CVE-2026-80888: Linux kernel · drm/vmwgfx: drop dma_buf reference on foreign-fd prime import
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f739416dc555fa205a785e5135d73fa39b26f35d : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:34 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in f739416dc555fa205a785e5135d73fa39b26f35d, c4fd91ee7228f56fbb4cf528757dc17ffefeb0ee, c1c22fca0a0896a452a7cb92422d67babd65b4be +5
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix is available and has been applied in multiple Linux kernel commits. Users should update to a Linux kernel version that includes these fixes to prevent the dma_buf reference leak. No additional mitigation is required beyond applying the official patch.
Description
A vulnerability in the Linux kernel's drm/vmwgfx component causes a dma_buf reference leak when an unprivileged renderD client imports a non-vmwgfx prime file descriptor. This leak occurs because the reference acquired by dma_buf_get() is not released on error, leading to indefinite pinning of foreign GEM resources. The issue has been fixed by ensuring the reference is properly dropped via dma_buf_put() on error paths.
References
- git.kernel.org/stable/c/1715901e7052cf90fbf04c8303e563a47e021278 (opens in a new tab)
- git.kernel.org/stable/c/c4fd91ee7228f56fbb4cf528757dc17ffefeb0ee (opens in a new tab)
- git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057 (opens in a new tab)
- git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be (opens in a new tab)
- git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293 (opens in a new tab)
- git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f (opens in a new tab)
- git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf (opens in a new tab)
- git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d (opens in a new tab)