ASoC: meson: Keep link pointers valid on realloc failure

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93039
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:56 UTC
Updated2026-09-17 17:17:56 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b de33afc57f24538186bccf4c4f6c65dd38634fd8 git Not specified
CNA Linux Linux affected 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b 1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642 git Not specified
CNA Linux Linux affected 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b 8db0a0fc84e80aa9924e0833aef6cc95df94e5a7 git Not specified
CNA Linux Linux affected 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b 41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab git Not specified
CNA Linux Linux affected 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b 0b30fbe6bf7cf6499b19dd886f466e7c9e820089 git Not specified
CNA Linux Linux affected 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b 8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d git Not specified
CNA Linux Linux affected 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b 5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe git Not specified
CNA Linux Linux affected 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b 2aaa41cf974f83a6fb105422bac4e2f107150774 git Not specified
CNA Linux Linux affected 4.19 Not specified
CNA Linux Linux unaffected 4.19 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/0b30fbe6bf7cf6499b19dd886f466e7c9e820089 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/de33afc57f24538186bccf4c4f6c65dd38634fd8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8db0a0fc84e80aa9924e0833aef6cc95df94e5a7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2aaa41cf974f83a6fb105422bac4e2f107150774 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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