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VulnerabilityPublished Updated

CVE-2026-64173: Linux kernel · tracing: Do not call map->ops->elt_free() if elt_alloc() fails

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f383cff9fb382139980bac1bcd3f3f5d59f68435 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:03 UTC

Severity
Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
CISA SSVC
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 f383cff9fb382139980bac1bcd3f3f5d59f68435, b6723339736320b2e1784258ad4490cec7aac11a, b559a218eece132de0c58d444877b5627cbee524 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 2734b629525a9dae5bf217cbf0a9651da93d2108, < f383cff9fb382139980bac1bcd3f3f5d59f68435
Fixed in
  • f383cff9fb382139980bac1bcd3f3f5d59f68435
LinuxLinuxAffected
  • ≥ 2734b629525a9dae5bf217cbf0a9651da93d2108, < b6723339736320b2e1784258ad4490cec7aac11a
Fixed in
  • b6723339736320b2e1784258ad4490cec7aac11a
LinuxLinuxAffected
  • ≥ 2734b629525a9dae5bf217cbf0a9651da93d2108, < b559a218eece132de0c58d444877b5627cbee524
Fixed in
  • b559a218eece132de0c58d444877b5627cbee524
LinuxLinuxAffected
  • ≥ 2734b629525a9dae5bf217cbf0a9651da93d2108, < b427e9f6d81c9341cba23ef92f860f99f830d91d
Fixed in
  • b427e9f6d81c9341cba23ef92f860f99f830d91d
LinuxLinuxAffected
  • ≥ 2734b629525a9dae5bf217cbf0a9651da93d2108, < 798183376d9d3e278a270ea0e75a5769c8f145d9
Fixed in
  • 798183376d9d3e278a270ea0e75a5769c8f145d9
LinuxLinuxAffected
  • ≥ 2734b629525a9dae5bf217cbf0a9651da93d2108, < 49332e49ad5b20262cc719b03d4123b9362de701
Fixed in
  • 49332e49ad5b20262cc719b03d4123b9362de701

AI-suggested

A fix is available in the Linux kernel source as indicated by the listed fixed commit hashes. Users and administrators should update to a kernel version that includes these fixes to remediate the issue.

Description

A vulnerability in the Linux kernel tracing subsystem was fixed by ensuring that the function map->ops->elt_free() is not called if the allocation function map->ops->elt_alloc() fails. This prevents improper freeing operations when object allocation fails during tracing map element allocation.

References

Community reviews

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