CVE-2026-98142: Linux kernel · drm/cirrus-qemu: Validate BAR0 size during probe
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in 92312d333bf700798f92f30406c721bce87506f3 : patch Linux kernel soon.
Data as of 26 Oct 2026, 13:47 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 92312d333bf700798f92f30406c721bce87506f3, 144f51cd0ccc3ad47a6099917b7bb535611fb18f, 26bd90c886218f36c9adeab206b0e27b4384e2f6 +2
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 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 |
|---|---|---|
| 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– |
AI-suggested
A fix is available and has been applied in the Linux kernel. The patch validates that the PCI BAR0 resource size is not less than 4 MB during device probe and rejects devices that do not meet this requirement. Users should update to a Linux kernel version that includes this fix to prevent the issue.
Description
A vulnerability in the Linux kernel's cirrus-qemu DRM driver allows improper validation of the PCI BAR0 size during device probe. The driver assumes a fixed VRAM size of 4 MB but does not verify that the mapped BAR0 resource meets this size requirement. This can lead to framebuffer memory operations exceeding the actual mapped memory, causing a supervisor write page fault and kernel crash.
References
- git.kernel.org/stable/c/2a0e7bcff3fa63e7309d2b39e18af59eb8ef2b6e (opens in a new tab)
- git.kernel.org/stable/c/0b5084a1f070ad1fc34e11945644ae034bbc774c (opens in a new tab)
- git.kernel.org/stable/c/26bd90c886218f36c9adeab206b0e27b4384e2f6 (opens in a new tab)
- git.kernel.org/stable/c/144f51cd0ccc3ad47a6099917b7bb535611fb18f (opens in a new tab)
- git.kernel.org/stable/c/92312d333bf700798f92f30406c721bce87506f3 (opens in a new tab)