SUSE Security Update: Security update for the Linux Kernel
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Announcement ID:    SUSE-SU-2022:3599-1
Rating:             important
References:         #1202677 #1202960 #1203552 #1203769 
Cross-References:   CVE-2022-2503 CVE-2022-3239 CVE-2022-3303
                    CVE-2022-41218
CVSS scores:
                    CVE-2022-2503 (NVD) : 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
                    CVE-2022-2503 (SUSE): 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
                    CVE-2022-3239 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2022-3239 (SUSE): 6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
                    CVE-2022-3303 (NVD) : 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2022-3303 (SUSE): 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
                    CVE-2022-41218 (NVD) : 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2022-41218 (SUSE): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products:
                    SUSE Linux Enterprise Server 12-SP3-BCL
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   An update that fixes four vulnerabilities is now available.

Description:


   The SUSE Linux Enterprise 12 SP3 kernel was updated.

   The following security bugs were fixed:

   - CVE-2022-3303: Fixed a race condition in the sound subsystem due to
     improper locking (bnc#1203769).
   - CVE-2022-41218: Fixed an use-after-free caused by refcount races in
     drivers/media/dvb-core/dmxdev.c (bnc#1202960).
   - CVE-2022-3239: Fixed an use-after-free in the video4linux driver that
     could lead a local user to able to crash the system or escalate their
     privileges (bnc#1203552).
   - CVE-2022-2503: Fixed a vulnerability that allowed root to bypass LoadPin
     and load untrusted and unverified kernel modules and firmware
     (bnc#1202677).

   The following non-security bugs were fixed:

   - x86/bugs: Reenable retbleed=off While for older kernels the return
     thunks are statically built in and cannot be dynamically patched out,
     retbleed=off should still be possible to do so that the mitigation can
     still be disabled on Intel who do not use the return thunks but IBRS.


Special Instructions and Notes:

   Please reboot the system after installing this update.

Patch Instructions:

   To install this SUSE Security 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 Server 12-SP3-BCL:

      zypper in -t patch SUSE-SLE-SERVER-12-SP3-BCL-2022-3599=1



Package List:

   - SUSE Linux Enterprise Server 12-SP3-BCL (x86_64):

      kernel-default-4.4.180-94.177.1
      kernel-default-base-4.4.180-94.177.1
      kernel-default-base-debuginfo-4.4.180-94.177.1
      kernel-default-debuginfo-4.4.180-94.177.1
      kernel-default-debugsource-4.4.180-94.177.1
      kernel-default-devel-4.4.180-94.177.1
      kernel-syms-4.4.180-94.177.1

   - SUSE Linux Enterprise Server 12-SP3-BCL (noarch):

      kernel-devel-4.4.180-94.177.1
      kernel-macros-4.4.180-94.177.1
      kernel-source-4.4.180-94.177.1


References:

   https://www.suse.com/security/cve/CVE-2022-2503.html
   https://www.suse.com/security/cve/CVE-2022-3239.html
   https://www.suse.com/security/cve/CVE-2022-3303.html
   https://www.suse.com/security/cve/CVE-2022-41218.html
   https://bugzilla.suse.com/1202677
   https://bugzilla.suse.com/1202960
   https://bugzilla.suse.com/1203552
   https://bugzilla.suse.com/1203769