SUSE-SU-2022:3599-1

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SUSE-SU-2022:3599-1

Summary: Security update for the Linux Kernel

Details: 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.

References: https://www.suse.com/support/update/announcement/2022/suse-su-20223599-1/, https://bugzilla.suse.com/1202677, https://bugzilla.suse.com/1202960, https://bugzilla.suse.com/1203552, https://bugzilla.suse.com/1203769, https://www.suse.com/security/cve/CVE-2022-2503, https://www.suse.com/security/cve/CVE-2022-3239, https://www.suse.com/security/cve/CVE-2022-3303, https://www.suse.com/security/cve/CVE-2022-41218