What’s Vulnerable › Vulnerabilities

CVE-2023-53165: udf: Fix uninitialized array access for some pathnames

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-15 · updated 2026-06-17
• Weakness: CWE-908

Description

In the Linux kernel, the following vulnerability has been resolved: udf: Fix uninitialized array access for some pathnames For filenames that begin with . and are between 2 and 5 characters long, UDF charset conversion code would read uninitialized memory in the output buffer. The only practical impact is that the name may be prepended a "unification hash" when it is not actually needed but still it is good to fix this.

Affected products

• Linux kernel: from 4.6 before 4.14.324; from 4.15 before 4.19.293; from 4.20 before 5.4.255; from 5.5 before 5.10.192; from 5.11 before 5.15.123; from 5.16 before 6.1.42 — fixed in 4.14.324, 4.19.293, 5.10.192, 5.15.123, 5.4.255, 6.1.42

How to fix

Upgrade to a fixed version: Linux kernel 4.14.324, 4.19.293, 5.10.192, 5.15.123. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/008ae78d1e12efa904dc819b1ec83e2bca6b2c56
• https://git.kernel.org/stable/c/028f6055c912588e6f72722d89c30b401bbcf013
• https://git.kernel.org/stable/c/3f1368af47acf4d0b2a5fb0d2c0d6919d2234b6d
• https://git.kernel.org/stable/c/4503f6fc95d6dee85fb2c54785848799e192c51c
• https://git.kernel.org/stable/c/4d50988da0db167aed6f38685145cb5cd526c4f8
• https://git.kernel.org/stable/c/985f9666698960dfc87a106d6314203fa90fda75
• https://git.kernel.org/stable/c/a6824149809395dfbb5bc36bc7057cc3cb84e56d
• https://git.kernel.org/stable/c/b37f998d357102e8eb0f8eeb33f03fff22e49cbf

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