CVE-2026-63954 (CVSS 7.8)

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.

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CVSS v3.1 Score

7.8

HIGH

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

EPSS — Exploit Prediction

0.0016

Probability of exploitation

0.06%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

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

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-63954? +

CVE-2026-63954 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0016, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-63954? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-63954