VulnerabilityPublished 4 Feb 2026Updated 22 Aug 2026

CVE-2026-23051: Linux kernel · drm/amdgpu: fix drm panic null pointer when driver not support atomic

Affects Linux kernelSource GCVE Database

Not known to be exploited · fixed in 6.17.0-1021.21~24.04.1 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 6.17.0-1021.21~24.04.1, 6.17.0-1021.24~24.04.1, 6.17.0-41.41~24.04.1 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Patches and advisories

Affected software

Product	Affected	Fixed in
Ubuntu 25.10linux`pkg:deb/ubuntu/linux?arch=source&distro=questing`Other threats	Affected 6.14.0-15.15 – 6.17.0-40.40 20 affected builds	Fixed in–
Ubuntu 25.10linux-aws`pkg:deb/ubuntu/linux-aws?arch=source&distro=questing`Other threats	Affected 6.14.0-1005.5 – 6.17.0-1019.19 17 affected builds	Fixed in–
Ubuntu 25.10linux-azure`pkg:deb/ubuntu/linux-azure?arch=source&distro=questing`Other threats	Affected 6.14.0-1004.4 – 6.17.0-1020.20 16 affected builds	Fixed in–
Ubuntu 25.10linux-azure-fde`pkg:deb/ubuntu/linux-azure-fde?arch=source&distro=questing`Other threats	Affected 6.17.0-1003.3 – 6.17.0-1017.17 10 affected builds	Fixed in–
Ubuntu 25.10linux-gcp`pkg:deb/ubuntu/linux-gcp?arch=source&distro=questing`Other threats	Affected 6.14.0-1006.6 – 6.17.0-1020.22 17 affected builds	Fixed in–
Ubuntu 25.10linux-oracle`pkg:deb/ubuntu/linux-oracle?arch=source&distro=questing`Other threats	Affected 6.14.0-1005.5 – 6.17.0-1018.18 16 affected builds	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available and should be applied by updating the Linux kernel to version 6.17.0-1021.21 or later as provided by the vendor's security updates (e.g., Ubuntu USN-8570-1 and USN-8594-1). After updating, a system reboot is required to apply the fix. Due to an ABI change in the kernel update, all third-party kernel modules must be recompiled and reinstalled to ensure compatibility. Follow the vendor's update instructions carefully to avoid system issues.

Description

A vulnerability in the Linux kernel's AMDGPU driver was fixed to prevent a null pointer dereference panic when the driver does not support atomic operations. The issue occurs because the framebuffer handling uses an incorrect pointer under certain conditions. This flaw was resolved in Linux kernel versions 6.17.0-1021.21 and later. Multiple Linux kernel subsystems, including GPU drivers, were updated to address various security issues. The vulnerability has medium severity and no known exploits in the wild. A patch is available and should be applied by updating to the fixed kernel versions. Due to an ABI change, recompilation and reinstallation of third-party kernel modules may be necessary after updating. The vulnerability affects many specific Linux kernel versions prior to 6.17.0-1021.21.

Impact

The vulnerability can cause a kernel panic due to a null pointer dereference in the AMDGPU driver when atomic operations are not supported. This can lead to system instability or denial of service. There are no known exploits in the wild. The issue affects multiple Linux kernel versions prior to 6.17.0-1021.21. The medium severity reflects the potential for system crashes but no direct evidence of privilege escalation or remote code execution.

Summary

CVE-2026-23051 is a vulnerability in the Linux kernel's drm/amdgpu driver where a null pointer dereference panic occurs if the driver does not support atomic operations. The issue arises because the framebuffer uses plane->fb instead of plane->state->fb when atomic support is missing, leading to a null pointer dereference and kernel panic. This flaw was fixed by a commit cherry-picked into Linux kernel versions starting with 6.17.0-1021.21. The fix is included in Ubuntu security updates for the 24.04 LTS release and related kernel packages. This vulnerability is part of a broader set of Linux kernel security fixes addressing multiple subsystems and drivers. The patch is available and users are advised to update and reboot their systems. Due to ABI changes, third-party kernel modules must be recompiled and reinstalled after the update.

References

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