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TI-2023-29290 Aliases CVE-2023-52983GHSA-2q9r-f82f-3g5x

block, bfq: fix uaf for bfqq in bic_set_bfqq()

Priority LOW 36CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for bfqq in bic_set_bfqq() After commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'"), bic->bfqq will be accessed in bic_set_bfqq(), however, in some context bic->bfqq will be freed, and bic_set_bfqq() is called with the freed bic->bfqq. Fix the problem by always freeing bfqq after bic_set_bfqq().

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00283 20th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1, 5.15.93, 6.1.11Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.0.16 to before 6.16.1Patch availableCNA
LinuxLinux5.15.86 to before 5.15.93; 6.1.2 to before 6.1.115.15.93, 6.1.11Patch availableCNA
  • Linux VendorLinux Affected 6.0.16 to before 6.1 Fixed in 6.1 Patch available CNA
  • Linux VendorLinux Affected 5.15.86 to before 5.15.93; 6.1.2 to before 6.1.11 Fixed in 5.15.93, 6.1.11 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.15.86 to before 5.15.93; 6.1.2 to before 6.1.11VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.0.16:*:*:*:*:*:*:*6.0.16VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.15.86 to before 5.15.93; 6.1.2 to before 6.1.11 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.0.16:*:*:*:*:*:*:* Versions 6.0.16 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.1
  • Fix · CNA Linux (Linux) Fixed in 5.15.93, 6.1.11

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Not affected: 3 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-52983
  2. 2026-10-03 Alias added: GHSA-2q9r-f82f-3g5x

References

Patch 4

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences