264 lines
15 KiB
JSON
264 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-93039",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-17T15:57:05.657Z",
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"datePublished": "2026-09-17T16:10:32.812Z",
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"dateUpdated": "2026-10-19T09:04:34.291Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:04:34.291Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.4,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - meson_card_reallocate_links() is reached only from meson_card_probe() (axg_card_pdrv.probe for compatible \"amlogic,axg-sound-card\") via meson_card_add_links() and axg_card_add_tdm_loopback(); no network protocol message or USB descriptor carries the dangling dai_link pointer.\nAC:H - The UAF fires only if meson_card_reallocate_links()'s krealloc of card->dai_link succeeds and the following krealloc of priv->link_data returns NULL. Both are GFP_KERNEL (reclaim allowed). meson_card_probe() then returns -ENOMEM; snd_soc_bind_card() maps DAI-component -EPROBE_DEFER to 0, so driver core does not retry axg_card_add_tdm_loopback().\nPR:N - meson_card_probe() and axg_card_add_tdm_loopback() have no capable() check. On Amlogic boards whose DT includes amlogic,axg-sound-card with a TDM playback link (meson-axg-s400.dts dai-link-6 / meson-khadas-vim3.dtsi dai-link-6), of_platform or udev autoload of snd-soc-meson-axg-sound-card runs this probe without an OS account.\nUI:N - axg_card_add_tdm_loopback() runs inside meson_card_probe() during automatic platform bind of the DT sound node; no victim must open /dev/snd/*, mount media, or plug extra hardware.\nS:U - meson_card_clean_references() use-after-frees and double-frees the host-kernel card->dai_link array from meson_card_reallocate_links(); impact stays in this kernel and is not a VM escape or IOMMU/DMA bypass.\nC:H - On the second-krealloc failure, meson_card_clean_references() walks the stale card->dai_link with for_each_card_prelinks() and reads link->cpus and link->codecs from the already-freed snd_soc_dai_link array, a heap UAF read.\nI:H - The same path kfree()s card->dai_link again (the old block krealloc may already have freed, or err_ldata's kfree(links) already released) and of_node_put()s pointers loaded from that freed array, a double-free/UAF write primitive.\nA:H - meson_card_clean_references() dereferences and kfree()s the freed dai_link array after meson_card_reallocate_links() returns -ENOMEM, causing a kernel oops or panic (slab UAF / invalid-free)."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"sound/soc/meson/meson-card-utils.c"
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],
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"versions": [
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{
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"version": "7864a79f37b55769b817d5e6c5ae0ca4bfdba93b",
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"lessThan": "de33afc57f24538186bccf4c4f6c65dd38634fd8",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7864a79f37b55769b817d5e6c5ae0ca4bfdba93b",
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"lessThan": "1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7864a79f37b55769b817d5e6c5ae0ca4bfdba93b",
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"lessThan": "8db0a0fc84e80aa9924e0833aef6cc95df94e5a7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7864a79f37b55769b817d5e6c5ae0ca4bfdba93b",
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"lessThan": "41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7864a79f37b55769b817d5e6c5ae0ca4bfdba93b",
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"lessThan": "0b30fbe6bf7cf6499b19dd886f466e7c9e820089",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7864a79f37b55769b817d5e6c5ae0ca4bfdba93b",
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"lessThan": "8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7864a79f37b55769b817d5e6c5ae0ca4bfdba93b",
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"lessThan": "5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7864a79f37b55769b817d5e6c5ae0ca4bfdba93b",
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"lessThan": "2aaa41cf974f83a6fb105422bac4e2f107150774",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"sound/soc/meson/meson-card-utils.c"
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],
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"versions": [
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{
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"version": "4.19",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.19",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.270",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.221",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.188",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.157",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.110",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.52",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "5.10.270"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "5.15.221"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "6.1.188"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "6.6.157"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "6.12.110"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "6.18.52"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "7.2.6"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.19",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/de33afc57f24538186bccf4c4f6c65dd38634fd8"
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},
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{
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"url": "https://git.kernel.org/stable/c/1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642"
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},
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{
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"url": "https://git.kernel.org/stable/c/8db0a0fc84e80aa9924e0833aef6cc95df94e5a7"
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},
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{
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"url": "https://git.kernel.org/stable/c/41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab"
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},
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{
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"url": "https://git.kernel.org/stable/c/0b30fbe6bf7cf6499b19dd886f466e7c9e820089"
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},
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{
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"url": "https://git.kernel.org/stable/c/8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d"
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},
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{
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"url": "https://git.kernel.org/stable/c/5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe"
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},
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{
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"url": "https://git.kernel.org/stable/c/2aaa41cf974f83a6fb105422bac4e2f107150774"
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}
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],
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"title": "ASoC: meson: Keep link pointers valid on realloc failure",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |