310 lines
16 KiB
JSON
310 lines
16 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-2026-43459",
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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": "2026-05-01T14:12:56.010Z",
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"datePublished": "2026-05-08T14:22:22.651Z",
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"dateUpdated": "2026-10-19T19:26:37.236Z"
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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": "2026-08-05T12:28:04.321Z"
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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: soc-core: flush delayed work before removing DAIs and widgets\n\nWhen a sound card is unbound while a PCM stream is open, a\nuse-after-free can occur in snd_soc_dapm_stream_event(), called from\nthe close_delayed_work workqueue handler.\n\nDuring unbind, snd_soc_unbind_card() flushes delayed work and then\ncalls soc_cleanup_card_resources(). Inside cleanup,\nsnd_card_disconnect_sync() releases all PCM file descriptors, and\nthe resulting PCM close path can call snd_soc_dapm_stream_stop()\nwhich schedules new delayed work with a pmdown_time timer delay.\nSince this happens after the flush in snd_soc_unbind_card(), the\nnew work is not caught. soc_remove_link_components() then frees\nDAPM widgets before this work fires, leading to the use-after-free.\n\nThe existing flush in soc_free_pcm_runtime() also cannot help as it\nruns after soc_remove_link_components() has already freed the widgets.\n\nAdd a flush in soc_cleanup_card_resources() after\nsnd_card_disconnect_sync() (after which no new PCM closes can\nschedule further delayed work) and before soc_remove_link_dais()\nand soc_remove_link_components() (which tear down the structures the\ndelayed work accesses)."
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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:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
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"baseScore": 7.3,
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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 - The vulnerable ASoC/ALSA teardown path is reached locally through open PCM device files and sound-card driver unbind/removal, not by network or adjacent inputs.\nAC:L - Once a PCM playback stream is open and card unbind occurs, the delayed work is queued deterministically after disconnect; no attacker-uncontrolled race win is required.\nPR:L - A low-privileged local user with access to ALSA PCM devices can control the open stream and close side of the sequence. The unbind side is normally root-mediated, but the lower-privileged scenario is defensible when paired with required user/admin interaction.\nUI:R - A non-admin attacker cannot normally write the root-owned sysfs driver unbind attribute or unload the driver, so exploitation in the low-privileged scenario requires a privileged user or system action to unbind/remove the sound card.\nS:U - The impact remains within the local kernel security authority; this is not a VM escape, IOMMU bypass, or cross-scope boundary violation.\nC:H - The bug is a kernel use-after-free in delayed work over freed DAPM/DAI-related objects. Following kernel scoring guidance, UAF memory corruption can enable high-impact information disclosure.\nI:H - The delayed work writes through freed widget/list objects and can corrupt kernel heap state. Following kernel scoring guidance, UAF memory corruption is treated as potentially enabling arbitrary write or control-flow compromise.\nA:H - Even without full exploitation, the use-after-free can dereference or mutate freed kernel objects from a workqueue and plausibly cause an oops, panic, or hang."
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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/soc-core.c"
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],
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"versions": [
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{
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"version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
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"lessThan": "bf80a89da97285d9b877e0c6995e870d46b8025c",
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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": "e894efef9ac7c10b7727798dcc711cccf07569f9",
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"lessThan": "3887e514978d28216246360b46a9cb534969eb5a",
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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": "e894efef9ac7c10b7727798dcc711cccf07569f9",
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"lessThan": "231568afbc0cd25b8fb2a94ebf9738eabe1cf007",
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"status": "affected",
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},
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{
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"version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
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"lessThan": "317a9298c54bb00319da73e5a7179f00e67fcbdf",
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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": "e894efef9ac7c10b7727798dcc711cccf07569f9",
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"lessThan": "eab71e11ce2447c1e01809cbc11eab4234cf8dc8",
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"status": "affected",
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"versionType": "git"
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{
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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": "e894efef9ac7c10b7727798dcc711cccf07569f9",
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"lessThan": "c054f0607c8bb1b1aa529bc109e4149298a1cccd",
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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": "e894efef9ac7c10b7727798dcc711cccf07569f9",
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"lessThan": "95bc5c225513fc3c4ce169563fb5e3929fbb938b",
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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/soc-core.c"
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],
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"versions": [
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{
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"version": "4.20",
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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": "4.20",
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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": "5.10.253",
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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": "5.15.203",
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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": "6.1.167",
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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": "6.6.130",
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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": "6.12.78",
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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": "6.18.19",
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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": "6.19.9",
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"lessThanOrEqual": "6.19.*",
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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": "7.0",
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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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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.20",
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"versionEndExcluding": "5.10.253"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/bf80a89da97285d9b877e0c6995e870d46b8025c"
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},
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{
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"url": "https://git.kernel.org/stable/c/3887e514978d28216246360b46a9cb534969eb5a"
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},
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{
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"url": "https://git.kernel.org/stable/c/231568afbc0cd25b8fb2a94ebf9738eabe1cf007"
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},
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{
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"url": "https://git.kernel.org/stable/c/317a9298c54bb00319da73e5a7179f00e67fcbdf"
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},
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{
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"url": "https://git.kernel.org/stable/c/eab71e11ce2447c1e01809cbc11eab4234cf8dc8"
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},
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{
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"url": "https://git.kernel.org/stable/c/7d33e6140945482a07f8089ee86e13e02553ffdb"
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},
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{
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"url": "https://git.kernel.org/stable/c/c054f0607c8bb1b1aa529bc109e4149298a1cccd"
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{
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"url": "https://git.kernel.org/stable/c/95bc5c225513fc3c4ce169563fb5e3929fbb938b"
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}
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],
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"title": "ASoC: soc-core: flush delayed work before removing DAIs and widgets",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-43459",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:17:35.638816Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T19:26:37.236Z"
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}
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}
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]
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}
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} |