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CVE-2026-80576— drm/amdgpu: reject oversized IBs with per-ring packet limits

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：通过每环包限制拒绝超大的 IB 在 GFX 环中， 将用户提供的 直接传递给 而未设置上限，而 会将长度编码到数据包字段中。过大的值可能会破坏相邻的控制位，从而导致命令提交不稳定。 修复措施： 新增一个用于限制每环 IB 数据包大小的辅助函数，并在分配 IB 之前拒绝超过相应 dword 上限的命令提交。 对于 GFX/compute/SDMA/VPE 环，使用文档中规定的 20 位长度限制（即最大值为 2^20 - 1 = 1,048,575）。

CVSS 8.8 · High

Affected Version Matrix 11

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6e164ba1057175fb8a370d8e05cbff5c57eac0c8 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1474f3970d1afd303e12ff14d06808eabb371576 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 07fe270ec07c138a70afe7a81e115a85c35c545c affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< fd37f9dd5b5ab70a46fa7bc76623c0528d602b27 affected
< 6.12.105 affected
< 6.18.46 affected
< 7.1.10 affected
6.12.105≤ 6.12.* unaffected
… +3 more rows
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I. Basic Information for CVE-2026-80576

Vulnerability Information
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Vulnerability Title
drm/amdgpu: reject oversized IBs with per-ring packet limits
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: reject oversized IBs with per-ring packet limits On GFX rings, amdgpu_cs_p2_ib() passed user-supplied ib_bytes through to ib->length_dw without a limit, while ring_emit_ib() encodes length into packet fields. Oversized values can corrupt adjacent control bits and destabilize command submission. Add a per-ring IB packet size limit helper and reject command submissions exceeding the corresponding dword limit before IB allocation. Use the documented 20-bit limit for GFX/compute/SDMA/VPE, and apply the MM fallback limit for other ring types. (cherry picked from commit 7f48fa2cf62e3fa6c9c3870aa74988f773247e52)
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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 ~ 6e164ba1057175fb8a370d8e05cbff5c57eac0c8 -
Linux Linux 4.2 -

II. Public POCs for CVE-2026-80576

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III. Intelligence Information for CVE-2026-80576

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Patches & Fixes for CVE-2026-80576 (3)

Vendor Advisories for CVE-2026-80576 (1)

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

CVE-2026-80589 9.8 CRITICAL block: stop the timeout timer when releasing a never added disk
CVE-2026-74752 9.8 CRITICAL sctp: validate cookie AUTH state before use
CVE-2026-80519 9.8 CRITICAL ovpn: finish crypto callback cleanup before peer release
CVE-2026-80528 9.8 CRITICAL ceph: avoid fs reclaim while using current->journal_info
CVE-2026-74746 9.8 CRITICAL netfilter: flowtable: publish GC-visible tuple last
CVE-2026-80561 9.8 CRITICAL libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-74744 9.8 CRITICAL ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
CVE-2026-74743 9.8 CRITICAL macvlan: inherit needed_headroom and needed_tailroom from lowerdev
CVE-2026-80558 9.8 CRITICAL libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80586 9.8 CRITICAL mptcp: options: reset DSS fields in case of unexpected size
CVE-2026-80557 9.8 CRITICAL libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-74737 9.8 CRITICAL net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
CVE-2026-80587 9.8 CRITICAL mptcp: avoid combining some incoming suboptions
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-2026-80554 9.3 CRITICAL s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80551 9.3 CRITICAL s390/vfio_ccw: Ensure first IDAW remains constant
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
CVE-2026-80553 8.8 HIGH s390/vfio_ccw: Cancel existing workqueues

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

IV. Related Vulnerabilities

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Same vendor: Linux

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