CVE-2026-72428: Linux kernel · bpf: Fix stack slot index in nospec checks
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f1471aa76d74e0df3b2a90731ca0208f498c670b : update Linux kernel when convenient.
Data as of 6 Nov 2026, 18:11 UTC
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
Disclosed: evidence found.
CVE published 15 Aug 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.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| 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
- git.kernel.org/stable/c/e62268e695075a481a6c4feeb022c19cf57422a6 (opens in a new tab)
- git.kernel.org/stable/c/a71eb8f730a91271cf47ce291e785b6b7e54622f (opens in a new tab)
- git.kernel.org/stable/c/ca119656baa8f48a56e0c2f3ab63fdd33ca9e307 (opens in a new tab)
- git.kernel.org/stable/c/475405593de2b796224c6297aece44f321195919 (opens in a new tab)
- git.kernel.org/stable/c/f1471aa76d74e0df3b2a90731ca0208f498c670b (opens in a new tab)
- git.kernel.org/stable/c/68b41e68a62299f26cb16af422b5c7d1c69dafd9 (opens in a new tab)
- git.kernel.org/stable/c/db8f1dcf5950b91886b9df4270bc816370d292c1 (opens in a new tab)
- git.kernel.org/stable/c/d1d53aa30ab3b5ae89161c9cc840b3f7489ad386 (opens in a new tab)