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VulnerabilityPublished

CVE-2026-98611: Linux kernel · bpf: Check params size before reading reserved fields

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited · fixed in e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a : patch Linux kernel soon.

Data as of 26 Oct 2026, 14:05 UTC

Severity
High

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

EPSS
0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a, cd12d3e08620257fbcaa262785d7f4b9473afc7a, a11212910cf09b2fe8db9afa41ef60c4f81879c5 +1

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Upgrade Linux kernel to e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a, cd12d3e08620257fbcaa262785d7f4b9473afc7a, a11212910cf09b2fe8db9afa41ef60c4f81879c5 or 86a0e945fb645ea90233fde239cd2de79f01974c.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 3e1c6f35409f9e447bf37f64840f5b65576bfb78, < e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a
Fixed in
  • e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a
LinuxLinuxAffected
  • ≥ 3e1c6f35409f9e447bf37f64840f5b65576bfb78, < cd12d3e08620257fbcaa262785d7f4b9473afc7a
Fixed in
  • cd12d3e08620257fbcaa262785d7f4b9473afc7a
LinuxLinuxAffected
  • ≥ 3e1c6f35409f9e447bf37f64840f5b65576bfb78, < a11212910cf09b2fe8db9afa41ef60c4f81879c5
Fixed in
  • a11212910cf09b2fe8db9afa41ef60c4f81879c5
LinuxLinuxAffected
  • ≥ 3e1c6f35409f9e447bf37f64840f5b65576bfb78, < 86a0e945fb645ea90233fde239cd2de79f01974c
Fixed in
  • 86a0e945fb645ea90233fde239cd2de79f01974c
LinuxLinuxAffected
  • =6.10
Fixed in–

AI-suggested

A fix is available and has been applied in the Linux kernel commits identified by hashes e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a, cd12d3e08620257fbcaa262785d7f4b9473afc7a, a11212910cf09b2fe8db9afa41ef60c4f81879c5, and 86a0e945fb645ea90233fde239cd2de79f01974a. Users should update to a patched kernel version to remediate this vulnerability.

Description

A vulnerability in the Linux kernel's BPF subsystem allows a BPF program to cause the kernel to read beyond the validated buffer region due to improper parameter size checking before accessing reserved fields. This issue has been fixed by moving the size check before the reserved field reads.

References

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