CVE-2026-93039ASoC: meson: Keep link pointers valid on realloc failure
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.4 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b before de33afc57f24538186bccf4c4f6c65dd38634fd8; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b builds before 1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b builds before 8db0a0fc84e80aa9924e0833aef6cc95df94e5a7; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b builds before 41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b builds before 0b30fbe6bf7cf6499b19dd886f466e7c9e820089; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b builds before 8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b builds before 5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b builds before 2aaa41cf974f83a6fb105422bac4e2f107150774 | CNA record |
References
- https://git.kernel.org/stable/c/de33afc57f24538186bccf4c4f6c65dd38634fd8
- https://git.kernel.org/stable/c/1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642
- https://git.kernel.org/stable/c/8db0a0fc84e80aa9924e0833aef6cc95df94e5a7
- https://git.kernel.org/stable/c/41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab
- https://git.kernel.org/stable/c/0b30fbe6bf7cf6499b19dd886f466e7c9e820089
- https://git.kernel.org/stable/c/8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d
- https://git.kernel.org/stable/c/5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe
- https://git.kernel.org/stable/c/2aaa41cf974f83a6fb105422bac4e2f107150774
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.