CVE-2026-90250Hinoki check available

Kernel panic via incompatible cgroup BPF replacement

Published Sep 17, 2026 · Updated Sep 17, 2026

Null-pointer dereference in Linux cgroup BPF allows local users to panic the kernel via incompatible program replacement. In kernel/bpf/cgroup.c, __cgroup_bpf_replace leaves required per-CPU cgroup storage unallocated when a replacement program introduces storage use, causing bpf_get_local_storage to encounter an uninitialized pointer. Exploitation requires privileges to attach and replace cgroup BPF programs and execution of the replacement, interrupting the host rather than granting additional privileges.

CVSS severity4.4
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Null-pointer dereference in Linux cgroup BPF allows local users to panic the kernel via incompatible program replacement. In kernel/bpf/cgroup.c, __cgroup_bpf_replace leaves required per-CPU cgroup storage unallocated when a replacement program introduces storage use, causing bpf_get_local_storage to encounter an uninitialized pointer. Exploitation requires privileges to attach and replace cgroup BPF programs and execution of the replacement, interrupting the host rather than granting additional privileges.

The record

CVE
CVE-2026-90250
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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?

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  1. Affected versionversion=0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <12feca126831556dc7fabe5a3ba28fbd328768b6
  2. Affected versionversion=0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <1ab3da12061d7ccb099f7e925fa2d865967a316a
  3. Affected versionversion=0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <3f562c537e9ecf4bc5e206cfffc2cc047f1b7e94
  4. Affected versionversion=0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <a033c950f6731be88a7da98604ed78f302f15b80
  5. Affected versionversion=5.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <12feca126831556dc7fabe5a3ba28fbd328768b6; version=0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <1ab3da12061d7ccb099f7e925fa2d865967a316a; version=0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <3f562c537e9ecf4bc5e206cfffc2cc047f1b7e94; version=0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <a033c950f6731be88a7da98604ed78f302f15b80; version=5.7

Published CVSS scores

4.4Amazon LinuxCVSS:3.1/AV:L/AC:L/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.

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

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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 exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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