CVE-2026-93039

Status: UPDATED  |  Advisory ID: CVE-2026-93039

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

ASoC: meson: Keep link pointers valid on realloc failure

meson_card_reallocate_links() grows the DAI link and private data

arrays with two consecutive krealloc() calls and updates the owner

pointers only after both calls have succeeded.

A successful krealloc() may move the data: it frees the old block and

returns a new one. When that happens for the link array and the second

krealloc() then fails, card->dai_link still points to the block that

krealloc() already freed, and the error path frees the new block too.

The probe error path then calls meson_card_clean_references(), which

dereferences card->dai_link and kfree()s it again, resulting in a

use-after-free and a double free.

Commit card->dai_link and card->num_links right after the first

krealloc() succeeds, so the pointer always refers to a valid allocation

that meson_card_clean_references() can walk and free. krealloc() with

__GFP_ZERO zero-initializes the added entries, so walking them on the

error path is safe. With both failure paths reduced to a plain return,

drop the goto labels and the error message. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References