VulnerabilityPublished 18 Oct 2026

CVE-2026-98508: Linux kernel · drm/virtio: fix NULL pointer dereference on fence allocation failure

Source GCVE Database

Authoritative record:CVE-2026-98508· Medium

Not known to be exploited · fixed in f2f1683955b95c9b958069da3050f7e8e129ff88 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f2f1683955b95c9b958069da3050f7e8e129ff88, ecced0076b700b5896e52af10d0776be8be36b0d, a8b83ed4a4b1d04c756f53e375e86d3881f66e72 +4

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 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.

ghsa-4gjh-xj79-p5g5

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=6.1.54 <6.2 >=6.5.4 <6.6	Fixed in f2f1683955b95c9b958069da3050f7e8e129ff88 ecced0076b700b5896e52af10d0776be8be36b0d a8b83ed4a4b1d04c756f53e375e86d3881f66e72 9571ab7493561afb4624d69572a7ebb67d76d10f 846b3c64fe3e77d9db20a7e3e62dbbb637c773e1 6.6 6.2
LinuxLinux	Affected =6.6	Fixed in–
Linuxlinux/kernel`pkg:deb/linux/kernel`Other threats	Affected >=6.1.54 <6.2 >=6.5.4 <6.6 =6.6	Fixed in 6.2 6.6

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

AI-suggested

A fix for this vulnerability has been applied in the Linux kernel. Users should update to a kernel version that includes this patch to prevent the NULL pointer dereference. Since this is a kernel-level issue, applying the official kernel update is the recommended remediation. Patch status is not explicitly confirmed in the provided data; users should verify with the vendor or kernel release notes for the specific fixed version.

Description

A NULL pointer dereference vulnerability in the Linux kernel's drm/virtio driver was resolved. The issue occurs when virtio_gpu_fence_alloc() fails due to memory pressure and returns NULL, but the caller functions do not check for this failure. This leads to a NULL pointer dereference in virtio_gpu_fence_event_create(), causing a kernel crash (general protection fault). The flaw was discovered through fuzz testing with Syzkaller and affects the virtio GPU driver component.

References

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