CVE-2026-74335

Kernel oops via exit-time BPF task lookup

Published Aug 15, 2026 · Updated Aug 15, 2026

NULL pointer dereference in the Linux kernel allows local users to trigger a kernel oops through a cgroup_skb BPF program. During task exit, bpf_task_from_vpid() passes a null PID namespace from task_active_pid_ns(current) to find_pid_ns(), which dereferences its idr member. Exploitation requires local privileges and a softirq race after the current task is unhashed; the observed consequence is an availability-only kernel fault.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel allows local users to trigger a kernel oops through a cgroup_skb BPF program. During task exit, bpf_task_from_vpid() passes a null PID namespace from task_active_pid_ns(current) to find_pid_ns(), which dereferences its idr member. Exploitation requires local privileges and a softirq race after the current task is unhashed; the observed consequence is an availability-only kernel fault.

The record

CVE
CVE-2026-74335
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=6.13
  2. Affected versionversion=675c3596ff32c040d1dd2e28dd57e83e634b9f60 <50dff00615522f3ec03449680ca23beb4cfc549c
  3. Affected versionversion=675c3596ff32c040d1dd2e28dd57e83e634b9f60 <a4c95b6221cb2972a94ed72663c09bd5b0b6dea4
  4. Affected versionversion=675c3596ff32c040d1dd2e28dd57e83e634b9f60 <b7474f4432dd9559ada03b01a8cd3472cd02c61d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.13; version=675c3596ff32c040d1dd2e28dd57e83e634b9f60 <50dff00615522f3ec03449680ca23beb4cfc549c; version=675c3596ff32c040d1dd2e28dd57e83e634b9f60 <a4c95b6221cb2972a94ed72663c09bd5b0b6dea4; version=675c3596ff32c040d1dd2e28dd57e83e634b9f60 <b7474f4432dd9559ada03b01a8cd3472cd02c61d

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.1Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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