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VulnerabilityPublished Updated

CVE-2026-74382: Linux kernel · net/sched: cls_bpf: prevent unbounded recursion in offload rollback

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in e2d3b7bab3748c811dc5750ce9a8d62bc7f90ed7 : patch Linux kernel soon.

Data as of 6 Nov 2026, 18:03 UTC

Severity
High

Rated High 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 e2d3b7bab3748c811dc5750ce9a8d62bc7f90ed7, a018f208ab7512380bd4cf670064d48cba00a1b1, 33373e1f378a501bc51aa73312f74295c84e3101 +5

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
  • ≥ 102740bd9436a3a6ba129af3a48271d794009fa5, < e2d3b7bab3748c811dc5750ce9a8d62bc7f90ed7
Fixed in
  • e2d3b7bab3748c811dc5750ce9a8d62bc7f90ed7
LinuxLinuxAffected
  • ≥ 102740bd9436a3a6ba129af3a48271d794009fa5, < a018f208ab7512380bd4cf670064d48cba00a1b1
Fixed in
  • a018f208ab7512380bd4cf670064d48cba00a1b1
LinuxLinuxAffected
  • ≥ 102740bd9436a3a6ba129af3a48271d794009fa5, < 33373e1f378a501bc51aa73312f74295c84e3101
Fixed in
  • 33373e1f378a501bc51aa73312f74295c84e3101
LinuxLinuxAffected
  • ≥ 102740bd9436a3a6ba129af3a48271d794009fa5, < 10753da2d659dd425a6e620f47f86852d604f67f
Fixed in
  • 10753da2d659dd425a6e620f47f86852d604f67f
LinuxLinuxAffected
  • ≥ 102740bd9436a3a6ba129af3a48271d794009fa5, < 1387f252a242a51bfbb6eace29c8f8db21b457da
Fixed in
  • 1387f252a242a51bfbb6eace29c8f8db21b457da
LinuxLinuxAffected
  • ≥ 102740bd9436a3a6ba129af3a48271d794009fa5, < 27db54b90bcc7c37867fe664107fa25ea6a116e4
Fixed in
  • 27db54b90bcc7c37867fe664107fa25ea6a116e4

AI-suggested

A fix is available and has been applied in the Linux kernel. Users should update to a fixed kernel version containing the patches identified by the provided commit hashes. No additional mitigation steps are required beyond applying the official fix.

Description

A stack overflow vulnerability in the Linux kernel's cls_bpf_offload_cmd() function could cause unbounded recursion during offload rollback when tc_setup_cb_replace() fails repeatedly. This issue affects version 4.15 and was fixed by preventing recursive rollback calls.

References

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