{"id":"CVE-2026-93039","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-93039","summary":"ASoC: meson: Keep link pointers valid on realloc failure","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: meson: Keep link pointers valid on realloc failure\n\nmeson_card_reallocate_links() grows the DAI link and private data\narrays with two consecutive krealloc() calls and updates the owner\npointers only after both calls have succeeded.\n\nA successful krealloc() may move the data: it frees the old block and\nreturns a new one. When that happens for the link array and the second\nkrealloc() then fails, card->dai_link still points to the block that\nkrealloc() already freed, and the error path frees the new block too.\nThe probe error path then calls meson_card_clean_references(), which\ndereferences card->dai_link and kfree()s it again, resulting in a\nuse-after-free and a double free.\n\nCommit card->dai_link and card->num_links right after the first\nkrealloc() succeeds, so the pointer always refers to a valid allocation\nthat meson_card_clean_references() can walk and free. krealloc() with\n__GFP_ZERO zero-initializes the added entries, so walking them on the\nerror path is safe. With both failure paths reduced to a plain return,\ndrop the goto labels and the error message.","published":"2026-09-17T16:10:32.812Z","modified":"2026-09-19T03:47:26.786063445Z","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.10.270"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0b30fbe6bf7cf6499b19dd886f466e7c9e820089"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2aaa41cf974f83a6fb105422bac4e2f107150774"},{"type":"WEB","url":"https://git.kernel.org/stable/c/41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8db0a0fc84e80aa9924e0833aef6cc95df94e5a7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de33afc57f24538186bccf4c4f6c65dd38634fd8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93039.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93039"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-19T03:47:26.786063445Z"}}