CVE-2026-72104
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.
Affected versions
Linux kernel versions
6.18
and later are affected. Fixed in
6.18.40,
7.1.5,
7.2-rc3
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-72104?
CVE-2026-72104 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.18 onward and has been patched in 6.18.40, 7.1.5 and 7.2-rc3. CVE-2026-72104 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-72104?
Yes. CVE-2026-72104 has been patched. Fixed versions include 6.18.40, 7.1.5 and 7.2-rc3. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-72104 actively exploited?
No. CVE-2026-72104 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.