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NVD / CVE Program· CNA Linux

CVE-2026-80539: drm/amdgpu: disallow multiple FENCE chunks in one submit

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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 070229262ede37d17c4ea596650deb6e5eb5d106, 5f46322e0b84af29e10eb951ff45bd6ea40640de, 71aa45f7bfe46fbc6f51e7832573ff49b6005fea; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 070229262ede37d17c4ea596650deb6e5eb5d106, 5f46322e0b84af29e10eb951ff45bd6ea40640de, 71aa45f7bfe46fbc6f51e7832573ff49b6005fea; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 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/amdgpu: disallow multiple FENCE chunks in one submit amdgpu_cs_pass1() dispatches on chunk_id once per chunk without rejecting repeated ids. p->uf_bo is a single-slot field, so a submission carrying two AMDGPU_CHUNK_ID_FENCE chunks runs amdgpu_cs_p1_user_fence() twice, and the second run overwrites p->uf_bo with a freshly referenced BO without dropping the reference taken by the first. amdgpu_cs_parser_fini() only unrefs the final p->uf_bo, so every FENCE chunk but the last leaks a BO reference. The leaked BO outlives handle close and process exit. Reject duplicate FENCE chunks the same way commit fec5f8e8c6bc ("drm/amdgpu: disallow multiple BO_HANDLES chunks in one submit") did for p->bo_list. (cherry picked from commit 665b1fc2a1845206408f9a2c6da67101789edb82)

—No exploit Fix available
Published
Aug 26, 2026
Updated
Aug 27, 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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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

    • 4.2affected
    • d38ceaf99ed015f2a0b9af3499791bd3a3daae21 and later · before 7e9954e7212042ec808b06181b365b14f00c6f0aaffected · git
    • d38ceaf99ed015f2a0b9af3499791bd3a3daae21 and later · before 070229262ede37d17c4ea596650deb6e5eb5d106affected · git
    • d38ceaf99ed015f2a0b9af3499791bd3a3daae21 and later · before 5f46322e0b84af29e10eb951ff45bd6ea40640deaffected · git
    • d38ceaf99ed015f2a0b9af3499791bd3a3daae21 and later · before 71aa45f7bfe46fbc6f51e7832573ff49b6005feaaffected · git
    • d38ceaf99ed015f2a0b9af3499791bd3a3daae21 and later · before e3ee74d6dbbe409eb99546a7b0a02b2782f9021daffected · git
    • d38ceaf99ed015f2a0b9af3499791bd3a3daae21 and later · before 931cd1d1baeae68e8eb2c23bc1f3d8934dca6241affected · git
    • before 4.2not affected · semver
    • 6.1.185 and later · up to and including 6.1.*not affected · semver
    • 6.6.153 and later · up to and including 6.6.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.10-17.1.10-1

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-2026-80537Aug 26, 2026 · xfs: fix off-by-one in rtrefcount btree root level validation
    31Monitor
  • ← EarlierCVE-2026-80538Aug 26, 2026 · xfs: propagate errors from xfs_rtginode_load
    28Monitor
  • Later →CVE-2026-80542Aug 26, 2026 · drm/amd/display: Fix NULL pointer dereference in amdgpu_dm_crtc_set_vblank()
    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 Linux070229262ede37d17c4ea596650deb6e5eb5d106Vendor (CNA)
Linux Linux5f46322e0b84af29e10eb951ff45bd6ea40640deVendor (CNA)
Linux Linux71aa45f7bfe46fbc6f51e7832573ff49b6005feaVendor (CNA)
Linux Linux7e9954e7212042ec808b06181b365b14f00c6f0aVendor (CNA)
Linux Linux931cd1d1baeae68e8eb2c23bc1f3d8934dca6241Vendor (CNA)
Linux Linuxe3ee74d6dbbe409eb99546a7b0a02b2782f9021dVendor (CNA)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · Debian:12Package 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.

No dated events beyond publication.

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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. Fix✗ → ✓

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References

Show all references (5 more)

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

All records