VulnerabilityPublished 23 Oct 2026

CVE-2026-98949: Linux kernel · drm/imagination: Fix reference and vm_bo handling in remap()

Source GCVE Database

Authoritative record:CVE-2026-98949

Not known to be exploited · fixed in 784356aa88b82035d70e9faeded49b70cddeb29e : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 784356aa88b82035d70e9faeded49b70cddeb29e, 521cf8403a185a9d5790fe324bb43ba7ea85f51c, 196d4d10c1b33ae176685ff42a9994a5952b1d0f +1

Exploitation evidence

Disclosed: evidence found.
CVE published 23 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-5cm7-74mx-p47m

What to do

Upgrade Linux kernel to 784356aa88b82035d70e9faeded49b70cddeb29e, 521cf8403a185a9d5790fe324bb43ba7ea85f51c, 196d4d10c1b33ae176685ff42a9994a5952b1d0f or 9caa2eca5cc8372517ff36a83f321d4326abae93.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ ff5f643de0bf27874c4033cd57a0bd034b5c7d11, < 784356aa88b82035d70e9faeded49b70cddeb29e	Fixed in 784356aa88b82035d70e9faeded49b70cddeb29e
LinuxLinux	Affected ≥ ff5f643de0bf27874c4033cd57a0bd034b5c7d11, < 521cf8403a185a9d5790fe324bb43ba7ea85f51c	Fixed in 521cf8403a185a9d5790fe324bb43ba7ea85f51c
LinuxLinux	Affected ≥ ff5f643de0bf27874c4033cd57a0bd034b5c7d11, < 196d4d10c1b33ae176685ff42a9994a5952b1d0f	Fixed in 196d4d10c1b33ae176685ff42a9994a5952b1d0f
LinuxLinux	Affected ≥ ff5f643de0bf27874c4033cd57a0bd034b5c7d11, < 9caa2eca5cc8372517ff36a83f321d4326abae93	Fixed in 9caa2eca5cc8372517ff36a83f321d4326abae93
LinuxLinux	Affected =6.8	Fixed in–

AI-suggested

The vulnerability has been resolved in the Linux kernel drm/imagination driver by fixing the reference handling and correct linkage of vm_bo objects during remap operations. No additional mitigation steps are indicated. Users should update to the fixed kernel version once available. Patch status is not explicitly confirmed in the provided data; check the vendor or Linux kernel advisories for the official fix.

Description

A vulnerability in the Linux kernel's drm/imagination driver was resolved involving incorrect handling of reference counts and vm_bo linkage during GPU virtual address remapping. The flaw caused reference leaks and mismatches in object linkage when a memory map overlaps an existing mapping, potentially leading to resource leaks and warnings in kernel logs.

Impact

The vulnerability causes a leak of GEM references, resulting in memory (shmem) being held after the associated resource is closed, as well as kernel warnings due to object linkage mismatches. This can lead to resource exhaustion or instability in GPU memory management within the kernel. There is no indication of remote code execution or privilege escalation from the provided data.

Summary

The vulnerability in the Linux kernel drm/imagination driver relates to the pvr_vm_gpuva_remap() function, which incorrectly handles splitting of GPU virtual address mappings when a new map overlaps an existing one. Specifically, it takes unnecessary GEM references that are never dropped, causing reference leaks. Additionally, the parts resulting from the split are incorrectly linked to a new vm_bo object rather than the original one, triggering warnings due to object mismatches. The issue does not address locking of GPUVA lists, which is managed separately by switching GPUVM to immediate mode.

References

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