Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: cs35l41: validate and free ACPI mute object cs35l41_get_acpi_mute_state() evaluates a _DSM method to get the ACPI mute state and reads the first byte from the returned object. However, the returned ACPI object is owned by the caller and is never freed after use, so each successful query leaks the _DSM result object. The code also assumes that the returned object is a buffer with at least one byte. A malformed firmware response can return a different object type or an empty buffer, and the direct ret->buffer.pointer dereference can then access an invalid pointer. Use the typed _DSM helper, validate that the returned buffer contains at least one byte, and free the ACPI object after reading it.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 447106e92a0c86c332d40710436f38f64c322cd6 before 7fea0c89ed39a13d9a31163a74f8c62de30a4ffc; affected 447106e92a0c86c332d40710436f38f64c322cd6 before 08433c71f15984ddd5f5a307cf3f0aa9b84583aa; affected 447106e92a0c86c332d40710436f38f64c322cd6 before d5dfdf43259ad9d054052012095b1630e7366dcf; affected 447106e92a0c86c332d40710436f38f64c322cd6 before 3b597d24dc0455ae926f1053f97c2725038fc3cd |
| Linux / Linux | affected 6.7; unaffected 0 before 6.7; unaffected 6.12.101 through 6.12.*; unaffected 6.18.42 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.