RHSA-2023:3388 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 8.6 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: use-after-free caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c (CVE-2022-3564)

• kernel: stack overflow in do_proc_dointvec and proc_skip_spaces (CVE-2022-4378)

• kernel: unmap_mapping_range() race with munmap() on VM_PFNMAP mappings leads to stale TLB entry (CVE-2022-39188)

• kernel: use-after-free related to leaf anon_vma double reuse (CVE-2022-42703)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• An application stopped on robust futex used via pthread_mutex_lock() (BZ#2170055)

• dm crypt: backport flags to optionally bypass kcryptd workqueues (BZ#2175202)

• The qede driver changes rx-usecs: to 256 causing performance impact (BZ#2176106)

• Intel QAT Update - (kernel changes) (BZ#2176852)

• Concurrent NVMe scans cause panic with native multipath (BZ#2178244)

• CNB: Update TC subsystem to upstream v5.18 (BZ#2179432)

• Server crashed in cifs_reconnect -> dfs_cache_free_tgts (BZ#2182082)

• WARNING: possible circular locking dependency detected cpu_partial_store+0x44/0x80 (BZ#2184771)

• "smpboot: Scheduler frequency invariance went wobbly, disabling!" on nohz_full CPUs after long run (BZ#2188069)

• kernel-rt: task deadline_test:2526 blocked for more than 600 seconds. (BZ#2188625)

• gfs2: file corruption in large data files (BZ#2188687)

Enhancement(s):

• Add support for no HWP mode into intel_pstate for Sapphire Rapids (SPR) (BZ#2178644)