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redhatRedHatRHSA-2023:5604
HistoryOct 10, 2023 - 2:20 p.m.

(RHSA-2023:5604) Important: kernel security and bug fix update

2023-10-1014:20:39
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12
kernel
security vulnerabilities
bug fixes
linux operating system
cve
spectre
denial of service
rhel9.2
hyper-v
powervs
cpu affinity
cifs
null dereference
fc transport
unlock balance
core backports.

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.001

Percentile

25.7%

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

Security Fix(es):

  • Kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128)

  • kernel: nf_tables: use-after-free in nft_chain_lookup_byid() (CVE-2023-31248)

  • kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() (CVE-2023-35001)

  • kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt() (CVE-2023-35788)

  • kernel: hash collisions in the IPv6 connection lookup table (CVE-2023-1206)

  • kernel: Spectre v2 SMT mitigations problem (CVE-2023-1998)

  • kernel: fbcon: shift-out-of-bounds in fbcon_set_font() (CVE-2023-3161)

  • kernel: denial of service problem in net/unix/diag.c (CVE-2023-28327)

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):

  • Rhel9.2 - drmgr command is failing [hvcs/PowerVS] (BZ#2213790)

  • Wrong hwlat CPU affinity when started from a container. (BZ#2221158)

  • cifs: check the lease context if we actually got a lease (BZ#2221160)

  • [Hyper-V][RHEL 9]incomplete fc_transport implementation in storvsc causes null dereference in fc_timed_out() (BZ#2230748)

  • RHEL-9: WARNING: bad unlock balance detected! (BZ#2232214)

  • core: backports from upstream (BZ#2238028)

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.001

Percentile

25.7%