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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-99095: drm/vc4: drain the hangcheck timer and works on V3D unbind

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Fixed version: Linux Linux 17c5fa371de2d5508755cd4cd227cc8e2bb99240, 839eebfc95f8530feaa99677274912ac09b5820b, 94cf5971b1d04c6382437387c4dc3836cc7a1437; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 17c5fa371de2d5508755cd4cd227cc8e2bb99240, 839eebfc95f8530feaa99677274912ac09b5820b, 94cf5971b1d04c6382437387c4dc3836cc7a1437; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: drain the hangcheck timer and works on V3D unbind Nothing stops the hangcheck timer that submitted jobs arm, or the job_done_work that the render-done interrupt queues, at teardown: vc4_irq_disable() cancels only overflow_mem_work, and vc4_gem_destroy() runs from the drm-managed release, after vc4_v3d_unbind() has already uninstalled the V3D interrupt and cleared vc4->v3d. A timer still armed by then reads V3D registers through the NULL vc4->v3d pointer, and the late callbacks run on the vc4_dev embedding them after it has been freed. Drain them in vc4_v3d_unbind(): shut the timer down and cancel reset_work before the interrupt is taken down, because its vc4_irq_reset() re-enables it, then flush job_done_work so that completions queued at teardown still release their jobs. This issue was found by an in-house static analysis tool.

—No exploit Fix available
Published
Oct 26, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.5affected
    • d5b1a78a772f1e31a94f8babfa964152ec5e9aa5 and later · before 839eebfc95f8530feaa99677274912ac09b5820baffected · git
    • d5b1a78a772f1e31a94f8babfa964152ec5e9aa5 and later · before a1e7c7789aef551eea85de2f63989753c4fe9df6affected · git
    • d5b1a78a772f1e31a94f8babfa964152ec5e9aa5 and later · before 17c5fa371de2d5508755cd4cd227cc8e2bb99240affected · git
    • d5b1a78a772f1e31a94f8babfa964152ec5e9aa5 and later · before a046cd60ff3f4a8c8e672b3b18902682c1f91731affected · git
    • d5b1a78a772f1e31a94f8babfa964152ec5e9aa5 and later · before e61465d3e0292daebf4dbb34e0add635e2439569affected · git
    • d5b1a78a772f1e31a94f8babfa964152ec5e9aa5 and later · before ade226dfd28cf2fd1dce143c556d1ee77d953696affected · git
    • d5b1a78a772f1e31a94f8babfa964152ec5e9aa5 and later · before 94cf5971b1d04c6382437387c4dc3836cc7a1437affected · git
    • before 4.5not affected · semver
    • 5.15.224 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.11-17.2.11-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-99093Oct 26, 2026 · mm: don't schedule deferred kernel page table freeing while booting
    0Monitor
  • ← EarlierCVE-2026-99094Oct 26, 2026 · Bluetooth: btintel_pcie: fix TX descriptor bounds check
    30Monitor
  • Later →CVE-2026-99096Oct 26, 2026 · io_uring/register: don't exempt disabled rings from task restrictions
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux17c5fa371de2d5508755cd4cd227cc8e2bb99240Vendor (CNA)
Linux Linux839eebfc95f8530feaa99677274912ac09b5820bVendor (CNA)
Linux Linux94cf5971b1d04c6382437387c4dc3836cc7a1437Vendor (CNA)
Linux Linuxa046cd60ff3f4a8c8e672b3b18902682c1f91731Vendor (CNA)
Linux Linuxa1e7c7789aef551eea85de2f63989753c4fe9df6Vendor (CNA)
Linux Linuxade226dfd28cf2fd1dce143c556d1ee77d953696Vendor (CNA)
Linux Linuxe61465d3e0292daebf4dbb34e0add635e2439569Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 5, 2026+10 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records