CVE-2026-43302: Linux kernel · drm/v3d: Set DMA segment size to avoid debug warnings
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium · fixed in 5.15.0-1112.119~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1112.119~20.04.1, 5.15.0-1117.126~20.04.1, 5.15.0-1117.126~20.04.2 +63
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 8 May 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.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde@7.0.0-1008.8?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 25.10linuxpkg:deb/ubuntu/linux?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=questingOther threats | Affected
| 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 to affected Linux kernel versions to set the DMA segment size correctly and prevent debug warnings. Users should update to the fixed kernel versions as provided by their Linux distribution vendors. The Ubuntu advisory USN-8492-1 confirms that this and other kernel vulnerabilities have been fixed in updated kernel packages. No additional mitigation steps are required beyond applying the official updates.
Description
A vulnerability in the Linux kernel's drm/v3d driver was resolved by setting the DMA segment size to avoid debug warnings caused by segment size mismatches when CONFIG_DMA_API_DEBUG is enabled. The issue involved the 'max_seg_size' parameter not being set, causing the kernel to default to 64K and triggering debug warnings for over-mapping of V3D segment lengths. This flaw could lead to kernel warnings and potential instability. The vulnerability has been fixed in updated Linux kernel releases.
References
- ubuntu.com/security/CVE-2026-43302 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-43302 (opens in a new tab)
- git.kernel.org/linus/9eb018828b1b30dfba689c060735c50fc5b9f704 (opens in a new tab)
- git.kernel.org/stable/c/0290934d30abe7c88e18140fd5184c3f386b1e44 (opens in a new tab)
- git.kernel.org/stable/c/14d0d6c8b4504a60cfeea74775ab2e0164019e65 (opens in a new tab)
- git.kernel.org/stable/c/225023e3619b81af6d8d0e680503fc2d68633023 (opens in a new tab)
- git.kernel.org/stable/c/2663ef70c6123b2232190f917275e5c3175f97d0 (opens in a new tab)
- git.kernel.org/stable/c/9eb018828b1b30dfba689c060735c50fc5b9f704 (opens in a new tab)
- git.kernel.org/stable/c/cf510785f74e74c54de40a43a955b7f844857487 (opens in a new tab)
- git.kernel.org/stable/c/db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8492-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8492-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8497-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8498-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8499-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8492-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8492-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8492-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-8575-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8576-1 (opens in a new tab)