Skip to main content
VulnerabilityPublished Updated

CVE-2026-72428: Linux kernel · bpf: Fix stack slot index in nospec checks

Affects Linux kernelSource CVE Database V5

0
Compare

Not known to be exploited · fixed in f1471aa76d74e0df3b2a90731ca0208f498c670b : update Linux kernel when convenient.

Data as of 6 Nov 2026, 18:11 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

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 f1471aa76d74e0df3b2a90731ca0208f498c670b, e62268e695075a481a6c4feeb022c19cf57422a6, db8f1dcf5950b91886b9df4270bc816370d292c1 +9

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Aug 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
  • >=5.10.56 <5.10.261
  • >=4.19.207 <4.20
  • >=5.4.146 <5.5
  • >=5.13.8 <5.14
Fixed in
  • f1471aa76d74e0df3b2a90731ca0208f498c670b
  • e62268e695075a481a6c4feeb022c19cf57422a6
  • db8f1dcf5950b91886b9df4270bc816370d292c1
  • d1d53aa30ab3b5ae89161c9cc840b3f7489ad386
  • ca119656baa8f48a56e0c2f3ab63fdd33ca9e307
  • a71eb8f730a91271cf47ce291e785b6b7e54622f
  • 475405593de2b796224c6297aece44f321195919
  • 68b41e68a62299f26cb16af422b5c7d1c69dafd9
  • 5.14
  • 5.10.261
  • 5.5
  • 4.20
LinuxLinuxAffected
  • =5.14
Fixed in–

AI-suggested

This vulnerability has been fixed in Linux kernel versions 5.14, 5.10.261, and other specified fixed commits. Users and administrators should upgrade affected Linux kernel versions to these fixed releases or later to mitigate the issue. No additional mitigation actions are indicated beyond applying the official patches.

Description

CVE-2026-72428 is a vulnerability in the Linux kernel's BPF subsystem related to incorrect stack slot indexing in nospec checks. The issue involves a mismatch between the byte slots used during stack writes and those checked during Spectre v4 sanitization pre-checks, potentially leaving some bytes unsanitized. This flaw has been fixed in multiple Linux kernel versions including 5.14 and 5.10.261.

References

Community reviews

Loading reviews…