Upstream information
Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix memory leak in fib6_rule_suppress The kernel leaks memory when a `fib` rule is present in IPv6 nftables firewall rules and a suppress_prefix rule is present in the IPv6 routing rules (used by certain tools such as wg-quick). In such scenarios, every incoming packet will leak an allocation in `ip6_dst_cache` slab cache. After some hours of `bpftrace`-ing and source code reading, I tracked down the issue to ca7a03c41753 ("ipv6: do not free rt if FIB_LOOKUP_NOREF is set on suppress rule"). The problem with that change is that the generic `args->flags` always have `FIB_LOOKUP_NOREF` set[1][2] but the IPv6-specific flag `RT6_LOOKUP_F_DST_NOREF` might not be, leading to `fib6_rule_suppress` not decreasing the refcount when needed. How to reproduce: - Add the following nftables rule to a prerouting chain: meta nfproto ipv6 fib saddr . mark . iif oif missing drop This can be done with: sudo nft create table inet test sudo nft create chain inet test test_chain '{ type filter hook prerouting priority filter + 10; policy accept; }' sudo nft add rule inet test test_chain meta nfproto ipv6 fib saddr . mark . iif oif missing drop - Run: sudo ip -6 rule add table main suppress_prefixlength 0 - Watch `sudo slabtop -o | grep ip6_dst_cache` to see memory usage increase with every incoming ipv6 packet. This patch exposes the protocol-specific flags to the protocol specific `suppress` function, and check the protocol-specific `flags` argument for RT6_LOOKUP_F_DST_NOREF instead of the generic FIB_LOOKUP_NOREF when decreasing the refcount, like this. [1]: https://github.com/torvalds/linux/blob/ca7a03c4175366a92cee0ccc4fec0038c3266e26/net/ipv6/fib6_rules.c#L71 [2]: https://github.com/torvalds/linux/blob/ca7a03c4175366a92cee0ccc4fec0038c3266e26/net/ipv6/fib6_rules.c#L99SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having low severity.
National Vulnerability Database | SUSE | |
---|---|---|
Base Score | 5.5 | 2.3 |
Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L |
Attack Vector | Local | Local |
Attack Complexity | Low | Low |
Privileges Required | Low | High |
User Interaction | None | None |
Scope | Unchanged | Unchanged |
Confidentiality Impact | None | None |
Integrity Impact | None | None |
Availability Impact | High | Low |
CVSSv3 Version | 3.1 | 3.1 |
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 Enterprise Storage 7.1 | kernel-default | Affected |
SUSE Enterprise Storage 7.1 | kernel-source | Affected |
SUSE Linux Enterprise Desktop 15 SP5 | kernel-default | Affected |
SUSE Linux Enterprise Desktop 15 SP5 | kernel-source | Affected |
SUSE Linux Enterprise Desktop 15 SP6 | kernel-default | Already fixed |
SUSE Linux Enterprise Desktop 15 SP6 | kernel-source | Already fixed |
SUSE Linux Enterprise High Performance Computing 12 SP5 | kernel-default | Not affected |
SUSE Linux Enterprise High Performance Computing 12 SP5 | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 12 SP5 | kernel-source-azure | Not affected |
SUSE Linux Enterprise High Performance Computing 15 SP5 | kernel-default | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP5 | kernel-source | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP5 | kernel-source-azure | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP6 | kernel-default | Already fixed |
SUSE Linux Enterprise High Performance Computing 15 SP6 | kernel-source | Already fixed |
SUSE Linux Enterprise High Performance Computing 15 SP6 | kernel-source-azure | Already fixed |
SUSE Linux Enterprise Micro 5.1 | kernel-default | Affected |
SUSE Linux Enterprise Micro 5.1 | kernel-rt | Affected |
SUSE Linux Enterprise Micro 5.1 | kernel-source-rt | Affected |
SUSE Linux Enterprise Micro 5.2 | kernel-default | Affected |
SUSE Linux Enterprise Micro 5.2 | kernel-rt | Affected |
SUSE Linux Enterprise Micro 5.2 | kernel-source-rt | Affected |
SUSE Linux Enterprise Micro 5.3 | kernel-default | Affected |
SUSE Linux Enterprise Micro 5.3 | kernel-rt | Affected |
SUSE Linux Enterprise Micro 5.3 | kernel-source-rt | Affected |
SUSE Linux Enterprise Micro 5.4 | kernel-default | Affected |
SUSE Linux Enterprise Micro 5.4 | kernel-rt | Affected |
SUSE Linux Enterprise Micro 5.4 | kernel-source-rt | Affected |
SUSE Linux Enterprise Micro 5.5 | kernel-source-rt | Affected |
SUSE Linux Enterprise Module for Basesystem 15 SP5 | kernel-default | Affected |
SUSE Linux Enterprise Module for Basesystem 15 SP5 | kernel-source | Affected |
SUSE Linux Enterprise Module for Basesystem 15 SP6 | kernel-default | Already fixed |
SUSE Linux Enterprise Module for Basesystem 15 SP6 | kernel-source | Already fixed |
SUSE Linux Enterprise Module for Development Tools 15 SP5 | kernel-default | Affected |
SUSE Linux Enterprise Module for Development Tools 15 SP5 | kernel-source | Affected |
SUSE Linux Enterprise Module for Development Tools 15 SP6 | kernel-default | Already fixed |
SUSE Linux Enterprise Module for Development Tools 15 SP6 | kernel-source | Already fixed |
SUSE Linux Enterprise Module for Public Cloud 15 SP5 | kernel-source-azure | Affected |
SUSE Linux Enterprise Module for Public Cloud 15 SP6 | kernel-source-azure | Already fixed |
SUSE Linux Enterprise Real Time 12 SP5 | kernel-source-rt | Not affected |
SUSE Linux Enterprise Real Time 15 SP5 | kernel-source-rt | Affected |
SUSE Linux Enterprise Real Time 15 SP6 | kernel-source-rt | Already fixed |
SUSE Linux Enterprise Server 12 SP5 | kernel-default | 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 15 SP5 | kernel-default | Affected |
SUSE Linux Enterprise Server 15 SP5 | kernel-source | Affected |
SUSE Linux Enterprise Server 15 SP5 | kernel-source-azure | Affected |
SUSE Linux Enterprise Server 15 SP6 | kernel-default | Already fixed |
SUSE Linux Enterprise Server 15 SP6 | kernel-source | Already fixed |
SUSE Linux Enterprise Server 15 SP6 | kernel-source-azure | Already fixed |
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 12 SP5 | kernel-source-azure | Not affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kernel-default | Affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kernel-source | Affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kernel-source-azure | Affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP6 | kernel-default | Already fixed |
SUSE Linux Enterprise Server for SAP Applications 15 SP6 | kernel-source | Already fixed |
SUSE Linux Enterprise Server for SAP Applications 15 SP6 | kernel-source-azure | Already fixed |
SUSE Manager Proxy 4.3 | kernel-default | Affected |
SUSE Manager Proxy 4.3 | kernel-source | Affected |
SUSE Manager Retail Branch Server 4.3 | kernel-default | Affected |
SUSE Manager Retail Branch Server 4.3 | kernel-source | Affected |
SUSE Manager Server 4.3 | kernel-default | Affected |
SUSE Manager Server 4.3 | kernel-source | Affected |
SUSE Real Time Module 15 SP5 | kernel-source-rt | Affected |
SUSE Real Time Module 15 SP6 | kernel-source-rt | Already fixed |
openSUSE Leap 15.5 | kernel-default | Affected |
openSUSE Leap 15.5 | kernel-source | Affected |
openSUSE Leap 15.5 | kernel-source-azure | Affected |
openSUSE Leap 15.5 | kernel-source-rt | Affected |
openSUSE Leap 15.6 | kernel-default | Already fixed |
openSUSE Leap 15.6 | kernel-source | Already fixed |
openSUSE Leap 15.6 | kernel-source-azure | Already fixed |
openSUSE Leap 15.6 | kernel-source-rt | Already fixed |
Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
SUSE Linux Enterprise Desktop 15 SP4 | kernel-source | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP2 | kernel-source | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | kernel-source | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-default | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-source | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP3 | kernel-source | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | kernel-source | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-default | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-source | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP4 | kernel-source | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-default | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-source | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | kernel-default | Affected |
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | kernel-source | Affected |
SUSE Linux Enterprise Module for Basesystem 15 SP2 | kernel-source | Affected |
SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-source | Affected |
SUSE Linux Enterprise Module for Basesystem 15 SP4 | kernel-source | Affected |
SUSE Linux Enterprise Module for Development Tools 15 SP2 | kernel-source | Affected |
SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-source | Affected |
SUSE Linux Enterprise Module for Development Tools 15 SP4 | kernel-source | Affected |
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 15 SP2 | kernel-source | Affected |
SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-default | Affected |
SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-source | Affected |
SUSE Linux Enterprise Server 15 SP3 | kernel-source | Affected |
SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-default | Affected |
SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-source | Affected |
SUSE Linux Enterprise Server 15 SP4 | kernel-source | Affected |
SUSE Linux Enterprise Server 15 SP4-LTSS | kernel-default | Affected |
SUSE Linux Enterprise Server 15 SP4-LTSS | kernel-source | Affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-default | Affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-source | Affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-default | Affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-source | Affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP4 | kernel-default | Affected |
SUSE Linux Enterprise Server for SAP Applications 15 SP4 | kernel-source | Affected |
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 Enterprise Storage 6 | kernel-source | Not affected |
SUSE Enterprise Storage 7 | kernel-source | 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 | Affected |
SUSE Linux Enterprise Desktop 15 SP3 | kernel-source | 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-ESPOS | kernel-source | Not affected |
SUSE Linux Enterprise High Performance Computing 15-LTSS | 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 Development Tools 15 | kernel-source | Not affected |
SUSE Linux Enterprise Module for Development Tools 15 SP1 | kernel-source | Not affected |
SUSE Linux Enterprise Real Time 15 SP2 | kernel-source | Affected |
SUSE Linux Enterprise Real Time 15 SP3 | kernel-source | Affected |
SUSE Linux Enterprise Real Time 15 SP3 | kernel-source-rt | Affected |
SUSE Linux Enterprise Real Time 15 SP4 | kernel-source | Affected |
SUSE Linux Enterprise Real Time 15 SP4 | kernel-source-rt | Affected |
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 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-BCL | kernel-source | Affected |
SUSE Linux Enterprise Server 15 SP3-BCL | kernel-source | Affected |
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 SAP Applications 12 SP3 | kernel-source | Not affected |
SUSE Linux Enterprise Server for SAP Applications 12 SP4 | kernel-default | 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 Manager Proxy 4.0 | kernel-source | Not affected |
SUSE Manager Proxy 4.1 | kernel-source | Affected |
SUSE Manager Proxy 4.2 | kernel-source | Affected |
SUSE Manager Retail Branch Server 4.0 | kernel-source | Not affected |
SUSE Manager Retail Branch Server 4.1 | kernel-source | Affected |
SUSE Manager Retail Branch Server 4.2 | kernel-source | Affected |
SUSE Manager Server 4.0 | kernel-source | Not affected |
SUSE Manager Server 4.1 | kernel-source | Affected |
SUSE Manager Server 4.2 | kernel-source | Affected |
SUSE OpenStack Cloud 8 | kernel-source | Not affected |
SUSE OpenStack Cloud 9 | kernel-default | 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-default | Not affected |
SUSE OpenStack Cloud Crowbar 9 | kernel-source | Not affected |
SUSE Real Time Module 15 SP3 | kernel-source-rt | Affected |
SUSE Real Time Module 15 SP4 | kernel-source-rt | Affected |
SUSE Timeline for this CVE
CVE page created: Fri May 24 18:00:42 2024CVE page last modified: Tue Jun 11 10:38:13 2024