Upstream information
Description
In the Linux kernel, the following vulnerability has been resolved:blk-cgroup: Fix UAF in blkcg_unpin_online()
blkcg_unpin_online() walks up the blkcg hierarchy putting the online pin. To
walk up, it uses blkcg_parent(blkcg) but it was calling that after
blkcg_destroy_blkgs(blkcg) which could free the blkcg, leading to the
following UAF:
==================================================================
BUG: KASAN: slab-use-after-free in blkcg_unpin_online+0x15a/0x270
Read of size 8 at addr ffff8881057678c0 by task kworker/9:1/117
CPU: 9 UID: 0 PID: 117 Comm: kworker/9:1 Not tainted 6.13.0-rc1-work-00182-gb8f52214c61a-dirty #48
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS unknown 02/02/2022
Workqueue: cgwb_release cgwb_release_workfn
Call Trace:
<TASK>
dump_stack_lvl+0x27/0x80
print_report+0x151/0x710
kasan_report+0xc0/0x100
blkcg_unpin_online+0x15a/0x270
cgwb_release_workfn+0x194/0x480
process_scheduled_works+0x71b/0xe20
worker_thread+0x82a/0xbd0
kthread+0x242/0x2c0
ret_from_fork+0x33/0x70
ret_from_fork_asm+0x1a/0x30
</TASK>
...
Freed by task 1944:
kasan_save_track+0x2b/0x70
kasan_save_free_info+0x3c/0x50
__kasan_slab_free+0x33/0x50
kfree+0x10c/0x330
css_free_rwork_fn+0xe6/0xb30
process_scheduled_works+0x71b/0xe20
worker_thread+0x82a/0xbd0
kthread+0x242/0x2c0
ret_from_fork+0x33/0x70
ret_from_fork_asm+0x1a/0x30
Note that the UAF is not easy to trigger as the free path is indirected
behind a couple RCU grace periods and a work item execution. I could only
trigger it with artifical msleep() injected in blkcg_unpin_online().
Fix it by reading the parent pointer before destroying the blkcg's blkg's.
SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
National Vulnerability Database | SUSE | |
---|---|---|
Base Score | 7 | 6.4 |
Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H |
Attack Vector | Local | Local |
Attack Complexity | High | High |
Privileges Required | Low | High |
User Interaction | None | None |
Scope | Unchanged | Unchanged |
Confidentiality Impact | High | High |
Integrity Impact | High | High |
Availability Impact | High | High |
CVSSv3 Version | 3.1 | 3.1 |
SUSE | |
---|---|
Base Score | 7.1 |
Vector | CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
Attack Vector | Local |
Attack Complexity | High |
Attack Requirements | None |
Privileges Required | High |
User Interaction | None |
Vulnerable System Confidentiality Impact | High |
Vulnerable System Integrity Impact | High |
Vulnerable System Availability Impact | High |
Subsequent System Confidentiality Impact | None |
Subsequent System Integrity Impact | None |
Subsequent System Availability Impact | None |
CVSSv4 Version | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
Product(s) | Source package | State |
---|---|---|
Products under general support and receiving all security fixes. | ||
SUSE Linux Enterprise Desktop 15 SP6 | kernel-default | Not affected |
SUSE Linux Enterprise Desktop 15 SP6 | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP6 | kernel-default | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP6 | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP6 | kernel-source-azure | Not affected |
SUSE Linux Enterprise Live Patching 15 SP6 | kernel-default | Not affected |
SUSE Linux Enterprise Live Patching 15 SP6 | kernel-source | Not affected |
SUSE Linux Enterprise Micro 5.1 | kernel-default | Won't fix |
SUSE Linux Enterprise Micro 5.1 | kernel-rt | Won't fix |
SUSE Linux Enterprise Micro 5.1 | kernel-source | Won't fix |
SUSE Linux Enterprise Micro 5.1 | kernel-source-rt | Won't fix |
SUSE Linux Enterprise Micro 5.2 | kernel-default | Won't fix |
SUSE Linux Enterprise Micro 5.2 | kernel-rt | Won't fix |
SUSE Linux Enterprise Micro 5.2 | kernel-source | Won't fix |
SUSE Linux Enterprise Micro 5.2 | kernel-source-rt | Won't fix |
SUSE Linux Enterprise Micro 5.3 | kernel-default | Won't fix |
SUSE Linux Enterprise Micro 5.3 | kernel-rt | Won't fix |
SUSE Linux Enterprise Micro 5.3 | kernel-source | Won't fix |
SUSE Linux Enterprise Micro 5.3 | kernel-source-rt | Won't fix |
SUSE Linux Enterprise Micro 5.4 | kernel-default | Won't fix |
SUSE Linux Enterprise Micro 5.4 | kernel-rt | Won't fix |
SUSE Linux Enterprise Micro 5.4 | kernel-source | Won't fix |
SUSE Linux Enterprise Micro 5.4 | kernel-source-rt | Won't fix |
SUSE Linux Enterprise Micro 5.5 | kernel-default | Won't fix |
SUSE Linux Enterprise Micro 5.5 | kernel-source | Won't fix |
SUSE Linux Enterprise Micro 5.5 | kernel-source-rt | Won't fix |
SUSE Linux Enterprise Module for Basesystem 15 SP6 | kernel-default | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP6 | kernel-source | Not affected |
SUSE Linux Enterprise Module for Development Tools 15 SP6 | kernel-default | Not affected |
SUSE Linux Enterprise Module for Development Tools 15 SP6 | kernel-source | Not affected |
SUSE Linux Enterprise Module for Public Cloud 15 SP6 | kernel-source-azure | Not affected |
SUSE Linux Enterprise Real Time 15 SP6 | kernel-source-rt | Not affected |
SUSE Linux Enterprise Server 15 SP6 | kernel-default | Not affected |
SUSE Linux Enterprise Server 15 SP6 | kernel-source | Not affected |
SUSE Linux Enterprise Server 15 SP6 | kernel-source-azure | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP6 | kernel-default | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP6 | kernel-source | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP6 | kernel-source-azure | Not affected |
SUSE Linux Micro 6.0 | kernel-default | Not affected |
SUSE Linux Micro 6.0 | kernel-source | Not affected |
SUSE Linux Micro 6.0 | kernel-source-rt | Not affected |
SUSE Linux Micro 6.1 | kernel-default | Not affected |
SUSE Linux Micro 6.1 | kernel-source | Not affected |
SUSE Linux Micro 6.1 | kernel-source-rt | Not affected |
SUSE Manager Proxy 4.3 | kernel-default | Won't fix |
SUSE Manager Proxy 4.3 | kernel-source | Won't fix |
SUSE Manager Retail Branch Server 4.3 | kernel-default | Won't fix |
SUSE Manager Retail Branch Server 4.3 | kernel-source | Won't fix |
SUSE Manager Server 4.3 | kernel-default | Won't fix |
SUSE Manager Server 4.3 | kernel-source | Won't fix |
SUSE Real Time Module 15 SP6 | kernel-source-rt | Not affected |
openSUSE Leap 15.6 | kernel-default | Not affected |
openSUSE Leap 15.6 | kernel-source | Not affected |
openSUSE Leap 15.6 | kernel-source-azure | Not affected |
openSUSE Leap 15.6 | kernel-source-rt | Not affected |
Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
SUSE Linux Enterprise High Availability Extension 12 SP5 | kernel-default | Not affected |
SUSE Linux Enterprise High Availability Extension 12 SP5 | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP3 | kernel-source | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | kernel-source | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-default | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-source | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP4 | kernel-source | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | kernel-default | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | kernel-source | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP5 | kernel-default | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP5 | kernel-source | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP5 | kernel-source-azure | Unsupported |
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-default | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-source | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | kernel-default | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | kernel-source | Won't fix |
SUSE Linux Enterprise Live Patching 12 SP5 | kernel-default | Not affected |
SUSE Linux Enterprise Live Patching 12 SP5 | kernel-source | Not affected |
SUSE Linux Enterprise Live Patching 15 SP3 | kernel-default | Won't fix |
SUSE Linux Enterprise Live Patching 15 SP3 | kernel-source | Won't fix |
SUSE Linux Enterprise Live Patching 15 SP4 | kernel-default | Won't fix |
SUSE Linux Enterprise Live Patching 15 SP4 | kernel-source | Won't fix |
SUSE Linux Enterprise Live Patching 15 SP5 | kernel-default | Won't fix |
SUSE Linux Enterprise Live Patching 15 SP5 | kernel-source | Won't fix |
SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-source | Won't fix |
SUSE Linux Enterprise Module for Basesystem 15 SP4 | kernel-source | Won't fix |
SUSE Linux Enterprise Module for Basesystem 15 SP5 | kernel-default | Won't fix |
SUSE Linux Enterprise Module for Basesystem 15 SP5 | kernel-source | Won't fix |
SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-source | Won't fix |
SUSE Linux Enterprise Module for Development Tools 15 SP4 | kernel-source | Won't fix |
SUSE Linux Enterprise Module for Development Tools 15 SP5 | kernel-default | Won't fix |
SUSE Linux Enterprise Module for Development Tools 15 SP5 | kernel-source | Won't fix |
SUSE Linux Enterprise Module for Legacy 15 SP5 | kernel-default | Won't fix |
SUSE Linux Enterprise Module for Legacy 15 SP5 | kernel-source | Won't fix |
SUSE Linux Enterprise Module for Public Cloud 15 SP5 | kernel-source-azure | Unsupported |
SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | kernel-default | Not affected |
SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP5 | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP5 | kernel-source-azure | Not affected |
SUSE Linux Enterprise Server 12 SP5-LTSS | kernel-default | Not affected |
SUSE Linux Enterprise Server 12 SP5-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP5-LTSS | kernel-source-azure | Unsupported |
SUSE Linux Enterprise Server 15 SP3 | kernel-source | Won't fix |
SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-default | Won't fix |
SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-source | Won't fix |
SUSE Linux Enterprise Server 15 SP4 | kernel-source | Won't fix |
SUSE Linux Enterprise Server 15 SP4-LTSS | kernel-default | Won't fix |
SUSE Linux Enterprise Server 15 SP4-LTSS | kernel-source | Won't fix |
SUSE Linux Enterprise Server 15 SP5 | kernel-default | Won't fix |
SUSE Linux Enterprise Server 15 SP5 | kernel-source | Won't fix |
SUSE Linux Enterprise Server 15 SP5 | kernel-source-azure | Unsupported |
SUSE Linux Enterprise Server 15 SP5-LTSS | kernel-default | Won't fix |
SUSE Linux Enterprise Server 15 SP5-LTSS | kernel-source | Won't fix |
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | kernel-source | Not affected |
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | kernel-source-azure | Not affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP5 | kernel-default | Not affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP5 | kernel-source | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-default | Won't fix |
SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-source | Won't fix |
SUSE Linux Enterprise Server for SAP Applications 15 SP4 | kernel-default | Won't fix |
SUSE Linux Enterprise Server for SAP Applications 15 SP4 | kernel-source | Won't fix |
SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kernel-default | Won't fix |
SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kernel-source | Won't fix |
SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kernel-source-azure | Unsupported |
Products past their end of life and not receiving proactive updates anymore. | ||
HPE Helion OpenStack 8 | kernel-source | Not affected |
SUSE CaaS Platform 4.0 | kernel-source | Not affected |
SUSE CaaS Platform Toolchain 3 | kernel-source | Not affected |
SUSE Enterprise Storage 6 | kernel-source | Not affected |
SUSE Enterprise Storage 7 | kernel-source | Not affected |
SUSE Enterprise Storage 7.1 | kernel-source | Won't fix |
SUSE Linux Enterprise Desktop 11 SP4 | kernel-source | Not affected |
SUSE Linux Enterprise Desktop 12 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Desktop 12 SP3 | kernel-source | Not affected |
SUSE Linux Enterprise Desktop 12 SP4 | kernel-source | Not affected |
SUSE Linux Enterprise Desktop 15 | kernel-source | Not affected |
SUSE Linux Enterprise Desktop 15 SP1 | kernel-source | Not affected |
SUSE Linux Enterprise Desktop 15 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Desktop 15 SP3 | kernel-source | Won't fix |
SUSE Linux Enterprise Desktop 15 SP4 | kernel-source | Won't fix |
SUSE Linux Enterprise Desktop 15 SP5 | kernel-default | Won't fix |
SUSE Linux Enterprise Desktop 15 SP5 | kernel-source | Won't fix |
SUSE Linux Enterprise High Availability Extension 15 SP2 | kernel-default | Not affected |
SUSE Linux Enterprise High Availability Extension 15 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP1 | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-default | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-default | Won't fix |
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-source | Won't fix |
SUSE Linux Enterprise High Performance Computing 15-ESPOS | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise Live Patching 15 SP2 | kernel-default | Not affected |
SUSE Linux Enterprise Live Patching 15 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Micro 5.0 | kernel-default | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 | kernel-source | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP1 | kernel-source | Not affected |
SUSE Linux Enterprise Module for Basesystem 15 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Module for Development Tools 15 | kernel-source | Not affected |
SUSE Linux Enterprise Module for Development Tools 15 SP1 | kernel-source | Not affected |
SUSE Linux Enterprise Module for Development Tools 15 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT | kernel-source | Not affected |
SUSE Linux Enterprise Real Time 15 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Real Time 15 SP3 | kernel-source | Won't fix |
SUSE Linux Enterprise Real Time 15 SP3 | kernel-source-rt | Won't fix |
SUSE Linux Enterprise Real Time 15 SP4 | kernel-source | Won't fix |
SUSE Linux Enterprise Real Time 15 SP4 | kernel-source-rt | Won't fix |
SUSE Linux Enterprise Real Time 15 SP5 | kernel-source-rt | Won't fix |
SUSE Linux Enterprise Server 11 SP4 | kernel-source | Not affected |
SUSE Linux Enterprise Server 11 SP4 LTSS | kernel-default | Not affected |
SUSE Linux Enterprise Server 11 SP4 LTSS | kernel-source | Not affected |
SUSE Linux Enterprise Server 11 SP4-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP2-BCL | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP2-ESPOS | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP2-LTSS | kernel-default | Not affected |
SUSE Linux Enterprise Server 12 SP2-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP3 | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP3-BCL | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP3-ESPOS | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP3-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP4 | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP4-ESPOS | kernel-source | Not affected |
SUSE Linux Enterprise Server 12 SP4-LTSS | kernel-default | Not affected |
SUSE Linux Enterprise Server 12 SP4-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise Server 15 | kernel-source | Not affected |
SUSE Linux Enterprise Server 15 SP1 | kernel-source | Not affected |
SUSE Linux Enterprise Server 15 SP1-BCL | kernel-source | Not affected |
SUSE Linux Enterprise Server 15 SP1-LTSS | kernel-default | Not affected |
SUSE Linux Enterprise Server 15 SP1-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise Server 15 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Server 15 SP2-BCL | kernel-source | Not affected |
SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-default | Not affected |
SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise Server 15 SP3-BCL | kernel-source | Won't fix |
SUSE Linux Enterprise Server 15-LTSS | kernel-default | Not affected |
SUSE Linux Enterprise Server 15-LTSS | kernel-source | Not affected |
SUSE Linux Enterprise Server for Raspberry Pi 12 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP3 | kernel-source | Not affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP4 | kernel-source | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 | kernel-source | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP1 | kernel-source | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-default | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-source | Not affected |
SUSE Linux Enterprise Workstation Extension 15 SP5 | kernel-default | Won't fix |
SUSE Linux Enterprise Workstation Extension 15 SP5 | kernel-source | Won't fix |
SUSE Manager Proxy 4.0 | kernel-source | Not affected |
SUSE Manager Proxy 4.1 | kernel-source | Not affected |
SUSE Manager Proxy 4.2 | kernel-source | Won't fix |
SUSE Manager Retail Branch Server 4.0 | kernel-source | Not affected |
SUSE Manager Retail Branch Server 4.1 | kernel-source | Not affected |
SUSE Manager Retail Branch Server 4.2 | kernel-source | Won't fix |
SUSE Manager Server 4.0 | kernel-source | Not affected |
SUSE Manager Server 4.1 | kernel-source | Not affected |
SUSE Manager Server 4.2 | kernel-source | Won't fix |
SUSE OpenStack Cloud 7 | kernel-source | Not affected |
SUSE OpenStack Cloud 8 | kernel-source | Not affected |
SUSE OpenStack Cloud 9 | kernel-source | Not affected |
SUSE OpenStack Cloud Crowbar 8 | kernel-source | Not affected |
SUSE OpenStack Cloud Crowbar 9 | kernel-source | Not affected |
SUSE Real Time Module 15 SP3 | kernel-source-rt | Won't fix |
SUSE Real Time Module 15 SP4 | kernel-source-rt | Won't fix |
SUSE Real Time Module 15 SP5 | kernel-source-rt | Won't fix |
openSUSE Leap 15.3 | kernel-source | Won't fix |
openSUSE Leap 15.3 | kernel-source-rt | Won't fix |
openSUSE Leap 15.4 | kernel-source | Won't fix |
openSUSE Leap 15.4 | kernel-source-azure | Unsupported |
openSUSE Leap 15.4 | kernel-source-rt | Won't fix |
openSUSE Leap 15.5 | kernel-default | Won't fix |
openSUSE Leap 15.5 | kernel-source | Won't fix |
openSUSE Leap 15.5 | kernel-source-azure | Unsupported |
openSUSE Leap 15.5 | kernel-source-rt | Won't fix |
SUSE Timeline for this CVE
CVE page created: Thu Jan 9 12:14:21 2025CVE page last modified: Fri Jan 10 22:02:51 2025