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CVE-2026-98894— drm/amd/ras: reset CPER ring on corrupt entry size

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/amd/ras：在条目大小损坏时重置 CPER 环形缓冲区 当 CPER（Corrected Platform Error Record）环形缓冲区溢出处理逻辑推进读取指针时，它会信任从当前环形缓冲区内容中解析出的条目大小。然而，损坏的 CPER 数据可能生成一个在经历双字（dword）转换和指针掩码操作后无法推进读取指针（rptr）的条目大小。 在这种情况下，恢复循环会持续检查同一位置，同时持有 CPER 环形缓冲区的互斥锁。这会导致负责写入下一条 CPER

AI Predicted 5.5 Difficulty: Moderate

Affected Version Matrix 5

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a98d0d49757a113ce17960262b9cd4ccc1420108 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4d695e66d7027a0c78302e47ac76293675fbbb4d affected
< 6.18.53 affected
6.18.53≤ 6.18.* unaffected
7.2≤ * unaffected
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I. Basic Information for CVE-2026-98894

Vulnerability Information
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Vulnerability Title
drm/amd/ras: reset CPER ring on corrupt entry size
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/ras: reset CPER ring on corrupt entry size When CPER ring overflow handling advances the read pointer, it trusts the parsed entry size from the current ring contents. Corrupt CPER data can produce an entry size that does not advance rptr after dword conversion and pointer masking. In that case the recovery loop keeps testing the same location while holding the CPER ring mutex. This can hang the worker that is writing the next CPER record. Detect a no-progress rptr update and reset the CPER ring to an empty state instead. This drops the corrupt contents and lets the writer leave the recovery path without spinning.
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ a98d0d49757a113ce17960262b9cd4ccc1420108 -
Linux Linux 6.18.53 ~ 6.18.* -

II. Public POCs for CVE-2026-98894

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III. Intelligence Information for CVE-2026-98894

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Patches & Fixes for CVE-2026-98894 (2)

Same Patch Batch · Linux · 2026-10-23 · 218 CVEs total

CVE-2026-98938 rust: irq: pass RegistrationInner as cookie to request_irq
CVE-2026-98951 riscv: ptrace: Zero-initialize regset buffers before copyin
CVE-2026-98950 flow_dissector: avoid u16 truncation of hlen in bpf_flow_dissect()
CVE-2026-98949 drm/imagination: Fix reference and vm_bo handling in remap()
CVE-2026-98948 mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()
CVE-2026-98947 vsock: Fix memory leak in vmci_transport_recv_dgram_cb()
CVE-2026-98946 drm/vc4: Disable the V3D interrupt across runtime suspend
CVE-2026-98945 HID: steam: Rearrange teardown sequence
CVE-2026-98944 HID: steam: Refactor registration
CVE-2026-98943 HID: steam: Clean up locking
CVE-2026-98942 sched_ext: Build the cid tables privately and publish them with RCU
CVE-2026-98941 ext4: don't enable large folios on encrypted inodes
CVE-2026-98940 ASoC: qcom: lpass-cpu: use DAI table index for playback constraints
CVE-2026-98939 x86/mm: Drop unnecessary PMD page copy when freeing
CVE-2026-98927 KVM: arm64: nv: Fix life cycle of the nested_mmus array
CVE-2026-98930 KVM: s390: Fix IRQ injection with SIGP Stop and Store Status
CVE-2026-98929 macsec: initialize SecY before registering the netdevice
CVE-2026-98928 KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2
CVE-2026-98931 mtd: spinand: fix NULL pointer dereference with no ECC engine
CVE-2026-98926 drm/amd/display: Remove sink usage from DPMS

Showing top 20 of 218 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98894

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