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VulnerabilityPublished Updated

CVE-2026-80865: Linux kernel · bpf: Add missing access_ok call to copy_user_syms

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in d5dc200c3a3f217de072af269dd90adddf90e48d : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:34 UTC

Severity
Unrated

Rated by Threat Radar · 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 d5dc200c3a3f217de072af269dd90adddf90e48d, a67f7f9647cb243b3be32163e88e5bc76e3d51e9, 128391b57e0977c35243672a6f970073651f3831 +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Sep 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
  • ≥ 0236fec57a15dc2a068dfe4488e0c2ab4559b1ec, < d5dc200c3a3f217de072af269dd90adddf90e48d
Fixed in
  • d5dc200c3a3f217de072af269dd90adddf90e48d
LinuxLinuxAffected
  • ≥ 0236fec57a15dc2a068dfe4488e0c2ab4559b1ec, < a67f7f9647cb243b3be32163e88e5bc76e3d51e9
Fixed in
  • a67f7f9647cb243b3be32163e88e5bc76e3d51e9
LinuxLinuxAffected
  • ≥ 0236fec57a15dc2a068dfe4488e0c2ab4559b1ec, < 128391b57e0977c35243672a6f970073651f3831
Fixed in
  • 128391b57e0977c35243672a6f970073651f3831
LinuxLinuxAffected
  • ≥ 0236fec57a15dc2a068dfe4488e0c2ab4559b1ec, < 28ce7bcf8a29aa395b60764df4c97be745de89d0
Fixed in
  • 28ce7bcf8a29aa395b60764df4c97be745de89d0
LinuxLinuxAffected
  • ≥ 0236fec57a15dc2a068dfe4488e0c2ab4559b1ec, < 8b719cef5ac30ab83ce5693c5faf10e4944874af
Fixed in
  • 8b719cef5ac30ab83ce5693c5faf10e4944874af
LinuxLinuxAffected
  • ≥ 0236fec57a15dc2a068dfe4488e0c2ab4559b1ec, < 0b6252afcd1965f77c6a6f8a802a2e1381822b98
Fixed in
  • 0b6252afcd1965f77c6a6f8a802a2e1381822b98

AI-suggested

A fix is available and has been applied in the Linux kernel source as indicated by the listed fixed commit hashes. Users and administrators should update their Linux kernel from version 5.19 to a fixed version containing these commits to remediate the vulnerability.

Description

A vulnerability in the Linux kernel's BPF subsystem involved a missing access_ok call before using __get_user on a user space pointer in the copy_user_syms function. This flaw was addressed by adding the missing access_ok call for the entire pointer array and cleaning up error handling code. The issue affects Linux kernel version 5.19 and has been fixed in subsequent commits.

References

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