CVE-2026-63954

hpfs: fix a crash if hpfs_map_dnode_bitmap fails

HIGH

7.8

CVSS Score

Published: July 19, 2026 at 02:55 PM UTC

Updated: October 30, 2026 at 02:32 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH7.8

Exploit prediction

EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: hpfs: fix a crash if hpfs_map_dnode_bitmap fails If hpfs_map_dnode_bitmap fails, the code would call hpfs_brelse4 on uninitialized quad buffer head, causing a crash.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.12.1 ≤ v < 5.10.2595.11 ≤ v < 5.15.2105.16 ≤ v < 6.1.1766.13 ≤ v < 6.18.356.19 ≤ v < 7.0.126.2 ≤ v < 6.6.1436.7 ≤ v < 6.12.931da177e4c3f41524e886b7f1b8a0c1fc7321cac2 2.6.12 7.1

Vendor states this is fixed in 010b08084000ef018f1a8de5197087f3b91d8cfe (fixed)

Vendor states this is fixed in 0886c6f257fe3663f80218aa1919b0f3f21bf22c (fixed)

Vendor states this is fixed in 1648a3c7f4e18f46a4881920133fc4f2494185a0 (fixed)

Vendor states this is fixed in 1d73a533760bc5abb83b3cc759133596f7bb708f (fixed)

Vendor states this is fixed in 4f37bb30b57d6d403d02673074555bd3c3602bef (fixed)

Vendor states this is fixed in 7c58c55a2a16f7274772507bd1637be609351b4f (fixed)

Vendor states this is fixed in 974820a59efde7c1a7e1260bcfe9bb81f833cc9f (fixed)

Vendor states this is fixed in d98d8562b3284b5a5c8eb67e71b794508e46e288 (fixed)

Vendor states this is fixed in 2.6.12 (unaffected)

Vendor states this is fixed in 5.10.259 (unaffected)

Vendor states this is fixed in 5.15.210 (unaffected)

Vendor states this is fixed in 6.1.176 (unaffected)