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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： drm/amdgpu：禁止在一次提交中包含多个 FENCE 块 对每个块根据 进行分发，但并未拒绝重复的 ID。由于 是单槽位字段，若一次提交中携带两个 块， 会被执行两次，第二次执行会用新引用的 BO 覆盖 ，而第一次执行时获取的引用并未释放。 仅释放最终保留的 的引用，因此除最后一个之外的每个 FENCE 块都会导致一个 BO 引用泄漏。泄漏的 BO 会存活超过句柄关闭和进程退出。 参考提交 fec5f8e8c6bc（"drm/amdgpu：禁止在一次提交中包含多个

AI Predicted 5.1 Difficulty: Moderate EPSS 0.17% · P7

Possible ATT&CK Techniques 1 AI

T1069 · Permission Groups Discovery

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux d38ceaf99ed015f2a0b9af3499791bd3a3daae21< 7e9954e7212042ec808b06181b365b14f00c6f0a affected
d38ceaf99ed015f2a0b9af3499791bd3a3daae21< 070229262ede37d17c4ea596650deb6e5eb5d106 affected
d38ceaf99ed015f2a0b9af3499791bd3a3daae21< 5f46322e0b84af29e10eb951ff45bd6ea40640de affected
d38ceaf99ed015f2a0b9af3499791bd3a3daae21< 71aa45f7bfe46fbc6f51e7832573ff49b6005fea affected
d38ceaf99ed015f2a0b9af3499791bd3a3daae21< e3ee74d6dbbe409eb99546a7b0a02b2782f9021d affected
d38ceaf99ed015f2a0b9af3499791bd3a3daae21< 931cd1d1baeae68e8eb2c23bc1f3d8934dca6241 affected
4.2 affected
< 4.2 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-80539

Vulnerability Information
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Vulnerability Title
drm/amdgpu: disallow multiple FENCE chunks in one submit
Source: CVE Program / CVE List V5
Vulnerability Description
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)
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux d38ceaf99ed015f2a0b9af3499791bd3a3daae21 ~ 7e9954e7212042ec808b06181b365b14f00c6f0a -
Linux Linux 4.2 -

II. Public POCs for CVE-2026-80539

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III. Intelligence Information for CVE-2026-80539

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Patches & Fixes for CVE-2026-80539 (5)

Other References for CVE-2026-80539 (1)

Same Patch Batch · Linux · 2026-08-26 · 92 CVEs total

CVE-2026-80557 9.8 CRITICAL libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-80589 9.8 CRITICAL block: stop the timeout timer when releasing a never added disk
CVE-2026-74737 9.8 CRITICAL net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
CVE-2026-80558 9.8 CRITICAL libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80587 9.8 CRITICAL mptcp: avoid combining some incoming suboptions
CVE-2026-80528 9.8 CRITICAL ceph: avoid fs reclaim while using current->journal_info
CVE-2026-80561 9.8 CRITICAL libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-74743 9.8 CRITICAL macvlan: inherit needed_headroom and needed_tailroom from lowerdev
CVE-2026-74744 9.8 CRITICAL ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
CVE-2026-80519 9.8 CRITICAL ovpn: finish crypto callback cleanup before peer release
CVE-2026-74746 9.8 CRITICAL netfilter: flowtable: publish GC-visible tuple last
CVE-2026-80586 9.8 CRITICAL mptcp: options: reset DSS fields in case of unexpected size
CVE-2026-74752 9.8 CRITICAL sctp: validate cookie AUTH state before use
CVE-2026-80585 9.4 CRITICAL mptcp: fastopen: only mark MPTFO subflows with SYN data
CVE-2026-74751 9.4 CRITICAL riscv: lib: Fix ZBB strnlen reading past count boundary
CVE-2026-80551 9.3 CRITICAL s390/vfio_ccw: Ensure first IDAW remains constant
CVE-2026-80554 9.3 CRITICAL s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80552 8.8 HIGH s390/vfio_ccw: Ensure index for read/write regions are within range
CVE-2026-80548 8.8 HIGH s390/vfio_ccw: Selectively expand io_mutex
CVE-2026-80547 8.8 HIGH s390/vfio_ccw: Implement a crw lock

Showing top 20 of 92 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80539

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