CVE Catalog

CVE-2026-72104

Low risk· EPSS 10%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.20%

10th percentile - higher than 10% of all known CVEs

Summary

In the Linux kernel's dm-pcache module, the option parser does not check that each option has a value, which can lead to NULL pointer dereference. A malformed table can cause a system crash.

Risk Assessment

The vulnerability could be exploited by an attacker with device-mapper configuration privileges to cause a denial of service.

Recommendation

Apply the kernel patch that checks for a value for each option, and validate configuration before use.

Other vulnerabilities in Linux kernel

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Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: dm-pcache: reject option groups without values The pcache target parses optional arguments as name/value pairs. A table that advertises one optional argument and supplies only a recognized option name, for example "cache_mode", reaches parse_cache_opts() with argc == 1. The parser consumes the name, decrements argc to zero, then calls dm_shift_arg() again for the value. dm_shift_arg() returns NULL when no arguments remain, and the following strcmp() dereferences that NULL pointer. Check that each recognized option has a value before consuming it. This keeps valid "cache_mode writeback" and "data_crc true/false" tables unchanged while making malformed tables fail during target construction with a precise missing-value error.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS