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TI-2022-25813 Aliases CVE-2022-50329GHSA-mmqv-h65v-7p4p

block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq

Priority LOW 35CWE-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 bfq_exit_icq_bfqq Commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'") will access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq() can free bfqq first, and then call bic_set_bfqq(), which will cause uaf. Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00168 6th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15.87, 6.0.17, 6.1.3Red Hat: 1 advisoryRed 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
LinuxLinux5.15.86 to before 5.15.87; 6.0.16 to before 6.0.17; 6.1.2 to before 6.1.35.15.87, 6.0.17, 6.1.3Patch availableCNA
  • Linux VendorLinux Affected 5.15.86 to before 5.15.87; 6.0.16 to before 6.0.17; 6.1.2 to before 6.1.3 Fixed in 5.15.87, 6.0.17, 6.1.3 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:5.15.86:*:*:*:*:*:*:*5.15.86VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.0.16:*:*:*:*:*:*:*6.0.16VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.1.2:*:*:*:*:*:*:*6.1.2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*6.2 rc1VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:5.15.86:*:*:*:*:*:*:* Versions 5.15.86 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.0.16:*:*:*:*:*:*:* Versions 6.0.16 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.1.2:*:*:*:*:*:*:* Versions 6.1.2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:* Versions 6.2 rc1 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.15.87, 6.0.17, 6.1.3

Red Hat 1 advisory

  • RHSA-2023:6583 Released 2023-11-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-362.8.1.el9_3, libperf-5.14.0-362.8.1.el9_3
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-362.8.1.el9_3, kernel-64k-debug-devel-matched-5.14.0-362.8.1.el9_3, kernel-64k-devel-5.14.0-362.8.1.el9_3 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.2.0-362.8.1.el9_3, kernel-5.14.0-362.8.1.el9_3, kernel-64k-5.14.0-362.8.1.el9_3 +29
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-362.8.1.el9_3, kernel-rt-core-5.14.0-362.8.1.el9_3, kernel-rt-debug-5.14.0-362.8.1.el9_3 +9
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-362.8.1.el9_3, kernel-rt-core-5.14.0-362.8.1.el9_3, kernel-rt-debug-5.14.0-362.8.1.el9_3 +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 yet: Fix deferred
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-2022-50329
  2. 2026-10-03 Alias added: GHSA-mmqv-h65v-7p4p
  3. 2026-10-16 CISA SSVC decision points changed

References

Patch 5

  • 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