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TI-2026-31306 Aliases CVE-2026-43127GHSA-pmpx-w3f2-x2vp

ntfs3: fix circular locking dependency in run_unpack_ex

Priority LOW 24CWE-667Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-667 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix circular locking dependency in run_unpack_ex Syzbot reported a circular locking dependency between wnd->rw_lock (sbi->used.bitmap) and ni->file.run_lock. The deadlock scenario: 1. ntfs_extend_mft() takes ni->file.run_lock then wnd->rw_lock. 2. run_unpack_ex() takes wnd->rw_lock then tries to acquire ni->file.run_lock inside ntfs_refresh_zone(). This creates an AB-BA deadlock. Fix this by using down_read_trylock() instead of down_read() when acquiring run_lock in run_unpack_ex(). If the lock is contended, skip ntfs_refresh_zone() - the MFT zone will be refreshed on the next MFT operation. This breaks the circular dependency since we never block waiting for run_lock while holding wnd->rw_lock.

Why it matters now

EPSS 0.0012 1st percentileScored 2026-11-07
Fix Fixed Linux (Linux): 6.6.160, 6.12.114, 6.18.16 +2

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.6.66 to before 6.6.160; 6.12.5 to before 6.12.1146.6.160, 6.12.114Patch availableCNA
LinuxLinux6.13 and later6.6.160, 6.12.114, 6.18.16, 6.19.6, 7.0Patch availableCNA
  • Linux VendorLinux Affected 6.6.66 to before 6.6.160; 6.12.5 to before 6.12.114 Fixed in 6.6.160, 6.12.114 Patch available CNA
  • Linux VendorLinux Affected 6.13 and later Fixed in 6.6.160, 6.12.114, 6.18.16, 6.19.6, 7.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.6.66 to before 6.18.16; 6.19 to before 6.19.6VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.6.66 to before 6.18.16; 6.19 to before 6.19.6 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.6.160, 6.12.114
  • Fix · CNA Linux (Linux) Fixed in 6.6.160, 6.12.114, 6.18.16, 6.19.6, 7.0

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 5 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • 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-2026-43127
  2. 2026-10-03 Alias added: GHSA-pmpx-w3f2-x2vp
  3. 2026-10-21 Fix available: Linux/[email protected], Linux/[email protected], Linux/Linux@76016d15bbd90caa0ce7765fddf9bde8e943e601 +1 · CNA
  4. 2026-10-21 2 new references · CNA

References

Patch 3

Other 2

  • 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