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TI-2022-24886 Aliases CVE-2022-49377GHSA-4v4x-mh67-4m6p

blk-mq: don't touch ->tagset in blk_mq_get_sq_hctx

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: 4 fixed, 3 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: blk-mq: don't touch ->tagset in blk_mq_get_sq_hctx blk_mq_run_hw_queues() could be run when there isn't queued request and after queue is cleaned up, at that time tagset is freed, because tagset lifetime is covered by driver, and often freed after blk_cleanup_queue() returns. So don't touch ->tagset for figuring out current default hctx by the mapping built in request queue, so use-after-free on tagset can be avoided. Meantime this way should be fast than retrieving mapping from tagset.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00288 21st percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15.47, 5.17.15, 5.18.4 +1Red Hat: 2 advisoriesRed Hat: 4 fixed, 3 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
LinuxLinux5.12 and later5.15.47, 5.17.15, 5.18.4, 5.19Patch availableCNA
  • Linux VendorLinux Affected 5.12 and later Fixed in 5.15.47, 5.17.15, 5.18.4, 5.19 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.12 to before 5.15.47; 5.16 to before 5.17.15; 5.18 to before 5.18.4VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.12 to before 5.15.47; 5.16 to before 5.17.15; 5.18 to before 5.18.4 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.15.47, 5.17.15, 5.18.4, 5.19

Red Hat 2 advisories

  • RHSA-2025:10193 Released 2025-07-02 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.136.1.rt21.208.el9_0, kernel-rt-core-5.14.0-70.136.1.rt21.208.el9_0, kernel-rt-debug-5.14.0-70.136.1.rt21.208.el9_0 +9
    • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.136.1.rt21.208.el9_0, kernel-rt-core-5.14.0-70.136.1.rt21.208.el9_0, kernel-rt-debug-5.14.0-70.136.1.rt21.208.el9_0 +7
  • RHSA-2025:10174 Released 2025-07-01 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.136.1.el9_0, kernel-debug-devel-matched-5.14.0-70.136.1.el9_0, kernel-devel-5.14.0-70.136.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.136.1.el9_0, kernel-5.14.0-70.136.1.el9_0, kernel-abi-stablelists-5.14.0-70.136.1.el9_0 +14

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:10174
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2025:10174
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2025:10193
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2025:10193
Not affected: 2 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-49377
  2. 2026-10-03 Alias added: GHSA-4v4x-mh67-4m6p

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