VulnerabilityPublished 20 Jul 2026Updated 6 Nov 2026

CVE-2026-64187: Linux kernel · xfs: fail recovery on a committed log item with no regions

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in d98f22d2e11e0a36493aeb25b2933571ee90d9a4 : patch Linux kernel soon.

Data as of 6 Nov 2026, 17:03 UTC

Severity

High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in d98f22d2e11e0a36493aeb25b2933571ee90d9a4, d50b1fd066d66ceb548ba43e332cfe8a47e5e55a, d0ae7ec3aa61db5140b107f0a63e017f63e56a96 +4

Exploitation evidence

Disclosed: evidence found.
CVE published 20 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 89cebc8477290b152618ffa110bbeae340d50900, < d98f22d2e11e0a36493aeb25b2933571ee90d9a4	Fixed in d98f22d2e11e0a36493aeb25b2933571ee90d9a4
LinuxLinux	Affected ≥ 89cebc8477290b152618ffa110bbeae340d50900, < d50b1fd066d66ceb548ba43e332cfe8a47e5e55a	Fixed in d50b1fd066d66ceb548ba43e332cfe8a47e5e55a
LinuxLinux	Affected ≥ 89cebc8477290b152618ffa110bbeae340d50900, < d0ae7ec3aa61db5140b107f0a63e017f63e56a96	Fixed in d0ae7ec3aa61db5140b107f0a63e017f63e56a96
LinuxLinux	Affected ≥ 89cebc8477290b152618ffa110bbeae340d50900, < cccbabeb9a18fcb978d76d6047f2b59214aa7749	Fixed in cccbabeb9a18fcb978d76d6047f2b59214aa7749
LinuxLinux	Affected ≥ 89cebc8477290b152618ffa110bbeae340d50900, < 5105426424ad6981db827cc1ada835a488fab035	Fixed in 5105426424ad6981db827cc1ada835a488fab035
LinuxLinux	Affected ≥ 89cebc8477290b152618ffa110bbeae340d50900, < 2094dab19d45c487285617b7b68913d0cc0c1211	Fixed in 2094dab19d45c487285617b7b68913d0cc0c1211

AI-suggested

A fix for this vulnerability has been implemented in the Linux kernel as indicated by multiple fixed commit hashes. Users and administrators should update their Linux kernel to a version that includes these fixes. Since this is not a cloud service, manual patching is required. No additional mitigation steps are indicated by the vendor advisory.

Description

A vulnerability in the Linux kernel's XFS filesystem recovery code could cause a null pointer dereference during log recovery if a crafted log contains a committed transaction with no regions. This occurs when the first operation of a transaction is a bare transaction header without regions, leading to a null pointer read and kernel fault during recovery.

Impact

Exploitation of this vulnerability can cause a kernel null pointer dereference during XFS log recovery, leading to a denial of service via system crash or hang. Since the fault occurs during filesystem recovery, it may prevent mounting or recovering the filesystem properly. There is no indication of privilege escalation or data corruption beyond the denial of service impact. The vulnerability requires a crafted log to trigger, so it is not triggered by normal operation or benign logs.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Nov 2026, 17:03 UTC

Technical details

References

Community reviews

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