Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 before 1247615aadb74c89c1b2f01a6de7df9dab92ecb3; affected 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 before 0cbe13fe540330d31e5273bbf8cbd66bc7c9cb5a; affected 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 before d9c631e3fbd44246a2be781d26cfacbb9b8ec127 |
| Linux / Linux | affected 6.18; unaffected 0 before 6.18; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.