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redhatRedHatRHSA-2023:5603
HistoryOct 10, 2023 - 2:20 p.m.

(RHSA-2023:5603) Important: kernel-rt security and bug fix update

2023-10-1014:20:32
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13
real time linux kernel
security fixes
bug fixes
fine-tuning
determinism
vulnerabilities
cve
stack-out-of-bounds
hash collisions
spectre v2
denial of service
rhel-9.0.z12 batch

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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

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):

  • kernel-rt: update RT source tree to the latest RHEL-9.0.z12 Batch (BZ#2232645)

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%