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TI-2026-31357 Aliases CVE-2026-43178GHSA-6xqc-j72q-x4c8

procfs: fix possible double mmput() in do_procmap_query()

Priority LOW 33CWE-415Published · 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: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-415 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: procfs: fix possible double mmput() in do_procmap_query() When user provides incorrectly sized buffer for build ID for PROCMAP_QUERY we return with -ENAMETOOLONG error. After recent changes this condition happens later, after we unlocked mmap_lock/per-VMA lock and did mmput(), so original goto out is now wrong and will double-mmput() mm_struct. Fix by jumping further to clean up only vm_file and name_buf.

Why it matters now

EPSS 0.00132 2nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.12.75, 6.18.16, 6.19.6 +1Red Hat: 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.12.70 to before 6.12.75; 6.18.10 to before 6.18.166.12.75, 6.18.16Patch availableCNA
LinuxLinux6.19 and later6.12.75, 6.18.16, 6.19.6, 7.0Patch availableCNA
  • Linux VendorLinux Affected 6.12.70 to before 6.12.75; 6.18.10 to before 6.18.16 Fixed in 6.12.75, 6.18.16 Patch available CNA
  • Linux VendorLinux Affected 6.19 and later Fixed in 6.12.75, 6.18.16, 6.19.6, 7.0 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.12.70 to before 6.12.75; 6.18.10 to before 6.18.16; 6.19.1 to before 6.19.6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.19:-:*:*:*:*:*:*6.19VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.12.70 to before 6.12.75; 6.18.10 to before 6.18.16; 6.19.1 to before 6.19.6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.19:-:*:*:*:*:*:* Versions 6.19 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.12.75, 6.18.16
  • Fix · CNA Linux (Linux) Fixed in 6.12.75, 6.18.16, 6.19.6, 7.0

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6Affected—
Not affected: 4 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-43178
  2. 2026-10-03 Alias added: GHSA-6xqc-j72q-x4c8

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