CVE-2026-64485ALSA: compress: Fix task creation error unwind

Official description

In the Linux kernel, the following vulnerability has been resolved: ALSA: compress: Fix task creation error unwind snd_compr_task_new() allocates the driver task before validating the returned DMA buffers and reserving file descriptors. When either of those later steps fails, the core frees its task wrapper and DMA-buffer references without calling the driver's task_free() callback. Any driver resources allocated by task_create() are therefore leaked. The dual-fd allocation path also jumps to cleanup without storing the negative get_unused_fd_flags() result in retval. Since retval still contains the successful task_create() return value, TASK_CREATE can incorrectly report success although the task was discarded. Preserve the fd allocation errors and call task_free() when failure occurs after a successful task_create() callback.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/b27a75d42044d9d4709095617730b91b1c4af423
• https://git.kernel.org/stable/c/426a9947a38d272d0e19c031658da68e31128667
• https://git.kernel.org/stable/c/4a60127debb9e370d6c0e22a307326b624a141f3