CVE-2026-98075Public exploit

Kernel crash via unresolved BPF callback address

Published Sep 25, 2026 · Updated Sep 25, 2026

Improper BPF program verification in Linux allows local users to crash the kernel through a crafted timer callback. For a single-subprogram program, jit_subprogs() does not replace a BPF_PSEUDO_FUNC reference to main with a real address. Loading the trigger requires BPF privileges and BTF_FUNC_STATIC metadata; passing the unresolved value to bpf_timer_set_callback() calls a bogus address.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Improper BPF program verification in Linux allows local users to crash the kernel through a crafted timer callback. For a single-subprogram program, jit_subprogs() does not replace a BPF_PSEUDO_FUNC reference to main with a real address. Loading the trigger requires BPF privileges and BTF_FUNC_STATIC metadata; passing the unresolved value to bpf_timer_set_callback() calls a bogus address.

The record

CVE
CVE-2026-98075
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.13
  2. Affected versionversion=69c087ba6225b574afb6e505b72cb75242a3d844 <118212417ba0120d99f84154799f8880f07411f4
  3. Affected versionversion=69c087ba6225b574afb6e505b72cb75242a3d844 <374b2c5561db80fcdd7cdce44af37a49416f61c7
  4. Affected versionversion=69c087ba6225b574afb6e505b72cb75242a3d844 <92f0bd0e2b632c6565ac2214a4d7d2ed37e5b9f6
  5. Affected versionversion=69c087ba6225b574afb6e505b72cb75242a3d844 <d6c39774ae093c9f7009cc4ae918f18fc1af7ae7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.13; version=69c087ba6225b574afb6e505b72cb75242a3d844 <118212417ba0120d99f84154799f8880f07411f4; version=69c087ba6225b574afb6e505b72cb75242a3d844 <374b2c5561db80fcdd7cdce44af37a49416f61c7; version=69c087ba6225b574afb6e505b72cb75242a3d844 <92f0bd0e2b632c6565ac2214a4d7d2ed37e5b9f6; version=69c087ba6225b574afb6e505b72cb75242a3d844 <d6c39774ae093c9f7009cc4ae918f18fc1af7ae7

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started