Security update for the Linux Kernel

Announcement ID:	SUSE-SU-2023:4142-1
Rating:	important
References:	bsc#1176588 bsc#1202845 bsc#1207270 bsc#1208995 bsc#1210169 bsc#1210643 bsc#1210658 bsc#1212703 bsc#1213812 bsc#1214233 bsc#1214351 bsc#1214380 bsc#1214386 bsc#1215115 bsc#1215117 bsc#1215150 bsc#1215221 bsc#1215275 bsc#1215299 bsc#1215322 bsc#1215356
Cross-References:	CVE-2020-36766 CVE-2023-1192 CVE-2023-1206 CVE-2023-1859 CVE-2023-2177 CVE-2023-4004 CVE-2023-40283 CVE-2023-42753 CVE-2023-4389 CVE-2023-4622 CVE-2023-4623 CVE-2023-4881 CVE-2023-4921
CVSS scores:	CVE-2020-36766 ( SUSE ): 2.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N CVE-2020-36766 ( NVD ): 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVE-2023-1192 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2023-1192 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2023-1206 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2023-1206 ( NVD ): 5.7 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2023-1859 ( SUSE ): 1.9 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L CVE-2023-1859 ( NVD ): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2023-2177 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2023-2177 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2023-4004 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-4004 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-40283 ( SUSE ): 5.7 CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVE-2023-40283 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-42753 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-42753 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-4389 ( SUSE ): 5.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H CVE-2023-4389 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVE-2023-4622 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-4622 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-4623 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-4623 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-4881 ( SUSE ): 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L CVE-2023-4881 ( NVD ): 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H CVE-2023-4921 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-4921 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products:	SUSE Linux Enterprise Micro 5.1 SUSE Linux Enterprise Micro 5.2 SUSE Linux Enterprise Micro for Rancher 5.2

An update that solves 13 vulnerabilities and has eight security fixes can now be installed.

Description:

The SUSE Linux Enterprise 15 SP3 RT kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2023-4389: Fixed a reference counting issue in the Btrfs filesystem that could be exploited in order to leak internal kernel information or crash the system (bsc#1214351).
• CVE-2023-42753: Fixed an array indexing vulnerability in the netfilter subsystem. This issue may have allowed a local user to crash the system or potentially escalate their privileges (bsc#1215150).
• CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup table. A user located in the local network or with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up to 95% (bsc#1212703).
• CVE-2023-4921: Fixed a use-after-free vulnerability in the QFQ network scheduler which could be exploited to achieve local privilege escalatio (bsc#1215275).
• CVE-2023-4004: Fixed improper element removal netfilter nft_set_pipapo (bsc#1213812).
• CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain sockets component which could be exploited to achieve local privilege escalation (bsc#1215117).
• CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215115).
• CVE-2020-36766: Fixed a potential information leak in in the CEC driver (bsc#1215299).
• CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs which could be exploited to crash the system (bsc#1210169).
• CVE-2023-2177: Fixed a null pointer dereference issue in the sctp network protocol which could allow a user to crash the system (bsc#1210643).
• CVE-2023-4881: Fixed a out-of-bounds write flaw in the netfilter subsystem that could lead to potential information disclosure or a denial of service (bsc#1215221).
• CVE-2023-40283: Fixed use-after-free in l2cap_sock_ready_cb (bsc#1214233).
• CVE-2023-1192: Fixed use-after-free in cifs_demultiplex_thread() (bsc#1208995).

The following non-security bugs were fixed:

• bnx2x: new flag for track HW resource allocation (bsc#1202845 bsc#1215322).
• check-for-config-changes: ignore BUILTIN_RETURN_ADDRESS_STRIPS_PAC (bsc#1214380). gcc7 on SLE 15 does not support this while later gcc does.
• locking/rwsem: Disable reader optimistic spinning (bnc#1176588).
• mkspec: Allow unsupported KMPs (bsc#1214386)
• scsi: qedf: Add synchronization between I/O completions and abort (bsc#1210658).
• x86/pkeys: Revert a5eff7259790 ("x86/pkeys: Add PKRU value to init_fpstate") (bsc#1215356).
• x86/srso: Do not probe microcode in a guest (git-fixes).
• x86/srso: Fix SBPB enablement for spec_rstack_overflow=off (git-fixes).
• x86/srso: Fix srso_show_state() side effect (git-fixes).
• x86/srso: Set CPUID feature bits independently of bug or mitigation status (git-fixes).

Special Instructions and Notes:

• Please reboot the system after installing this update.

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

• SUSE Linux Enterprise Micro 5.1
  zypper in -t patch SUSE-SUSE-MicroOS-5.1-2023-4142=1
• SUSE Linux Enterprise Micro 5.2
  zypper in -t patch SUSE-SUSE-MicroOS-5.2-2023-4142=1
• SUSE Linux Enterprise Micro for Rancher 5.2
  zypper in -t patch SUSE-SUSE-MicroOS-5.2-2023-4142=1

Package List:

• SUSE Linux Enterprise Micro 5.1 (nosrc x86_64)
  • kernel-rt-5.3.18-150300.144.1
• SUSE Linux Enterprise Micro 5.1 (x86_64)
  • kernel-rt-debuginfo-5.3.18-150300.144.1
  • kernel-rt-debugsource-5.3.18-150300.144.1
• SUSE Linux Enterprise Micro 5.2 (nosrc x86_64)
  • kernel-rt-5.3.18-150300.144.1
• SUSE Linux Enterprise Micro 5.2 (x86_64)
  • kernel-rt-debuginfo-5.3.18-150300.144.1
  • kernel-rt-debugsource-5.3.18-150300.144.1
• SUSE Linux Enterprise Micro for Rancher 5.2 (nosrc x86_64)
  • kernel-rt-5.3.18-150300.144.1
• SUSE Linux Enterprise Micro for Rancher 5.2 (x86_64)
  • kernel-rt-debuginfo-5.3.18-150300.144.1
  • kernel-rt-debugsource-5.3.18-150300.144.1

References:

• https://www.suse.com/security/cve/CVE-2020-36766.html
• https://www.suse.com/security/cve/CVE-2023-1192.html
• https://www.suse.com/security/cve/CVE-2023-1206.html
• https://www.suse.com/security/cve/CVE-2023-1859.html
• https://www.suse.com/security/cve/CVE-2023-2177.html
• https://www.suse.com/security/cve/CVE-2023-4004.html
• https://www.suse.com/security/cve/CVE-2023-40283.html
• https://www.suse.com/security/cve/CVE-2023-42753.html
• https://www.suse.com/security/cve/CVE-2023-4389.html
• https://www.suse.com/security/cve/CVE-2023-4622.html
• https://www.suse.com/security/cve/CVE-2023-4623.html
• https://www.suse.com/security/cve/CVE-2023-4881.html
• https://www.suse.com/security/cve/CVE-2023-4921.html
• https://bugzilla.suse.com/show_bug.cgi?id=1176588
• https://bugzilla.suse.com/show_bug.cgi?id=1202845
• https://bugzilla.suse.com/show_bug.cgi?id=1207270
• https://bugzilla.suse.com/show_bug.cgi?id=1208995
• https://bugzilla.suse.com/show_bug.cgi?id=1210169
• https://bugzilla.suse.com/show_bug.cgi?id=1210643
• https://bugzilla.suse.com/show_bug.cgi?id=1210658
• https://bugzilla.suse.com/show_bug.cgi?id=1212703
• https://bugzilla.suse.com/show_bug.cgi?id=1213812
• https://bugzilla.suse.com/show_bug.cgi?id=1214233
• https://bugzilla.suse.com/show_bug.cgi?id=1214351
• https://bugzilla.suse.com/show_bug.cgi?id=1214380
• https://bugzilla.suse.com/show_bug.cgi?id=1214386
• https://bugzilla.suse.com/show_bug.cgi?id=1215115
• https://bugzilla.suse.com/show_bug.cgi?id=1215117
• https://bugzilla.suse.com/show_bug.cgi?id=1215150
• https://bugzilla.suse.com/show_bug.cgi?id=1215221
• https://bugzilla.suse.com/show_bug.cgi?id=1215275
• https://bugzilla.suse.com/show_bug.cgi?id=1215299
• https://bugzilla.suse.com/show_bug.cgi?id=1215322
• https://bugzilla.suse.com/show_bug.cgi?id=1215356