High 7.8Published Jul 19, 2026

CVE-2026-63954hpfs: fix a crash if hpfs_map_dnode_bitmap fails

Updated under an hour ago (Oct 28, 2026, 8:30 AM ET)

Does this affect you?

It affects Linux. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Awaiting Analysis
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 010b08084000ef018f1a8de5197087f3b91d8cfe; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d98d8562b3284b5a5c8eb67e71b794508e46e288; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 1648a3c7f4e18f46a4881920133fc4f2494185a0; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7c58c55a2a16f7274772507bd1637be609351b4f; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 builds before 1d73a533760bc5abb83b3cc759133596f7bb708f; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0886c6f257fe3663f80218aa1919b0f3f21bf22c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4f37bb30b57d6d403d02673074555bd3c3602bef; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 974820a59efde7c1a7e1260bcfe9bb81f833cc9f	CNA record

References

References

https://git.kernel.org/stable/c/010b08084000ef018f1a8de5197087f3b91d8cfe
https://git.kernel.org/stable/c/d98d8562b3284b5a5c8eb67e71b794508e46e288
https://git.kernel.org/stable/c/1648a3c7f4e18f46a4881920133fc4f2494185a0
https://git.kernel.org/stable/c/7c58c55a2a16f7274772507bd1637be609351b4f
https://git.kernel.org/stable/c/1d73a533760bc5abb83b3cc759133596f7bb708f
https://git.kernel.org/stable/c/0886c6f257fe3663f80218aa1919b0f3f21bf22c
https://git.kernel.org/stable/c/4f37bb30b57d6d403d02673074555bd3c3602bef
https://git.kernel.org/stable/c/974820a59efde7c1a7e1260bcfe9bb81f833cc9f

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.