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CVE-2026-63954

HIGHCVSS 7.8/10EPSS 0.16%

Last modified

CVE-2026-63954 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.16%

6.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 010b08084000ef018f1a8de5197087f3b91d8cfe; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d98d8562b3284b5a5c8eb67e71b794508e46e288; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1648a3c7f4e18f46a4881920133fc4f2494185a0; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 7c58c55a2a16f7274772507bd1637be609351b4f; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1d73a533760bc5abb83b3cc759133596f7bb708f; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0886c6f257fe3663f80218aa1919b0f3f21bf22c; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4f37bb30b57d6d403d02673074555bd3c3602bef; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 974820a59efde7c1a7e1260bcfe9bb81f833cc9f
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-63954?
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.
How severe is CVE-2026-63954?
CVE-2026-63954 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-63954?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST