ASoC: soc-core: flush delayed work before removing DAIs and widgets
In the Linux kernel, the following vulnerability has been resolved: ASoC: soc-core: flush delayed work before removing DAIs and widgets When a sound card is unbound while a PCM stream is open, a use-after-free can occur in snd_soc_dapm_stream_event(), called from the close_delayed_work workqueue handler. During unbind, snd_soc_unbind_card() flushes delayed work and then calls soc_cleanup_card_resources(). Inside cleanup, snd_card_disconnect_sync() releases all PCM file descriptors, and the resulting PCM close path can call snd_soc_dapm_stream_stop() which schedules new delayed work with a pmdown_time timer delay. Since this happens after the flush in snd_soc_unbind_card(), the new work is not caught. soc_remove_link_components() then frees DAPM widgets before this work fires, leading to the use-after-free. The existing flush in soc_free_pcm_runtime() also cannot help as it runs after soc_remove_link_components() has already freed the widgets. Add a flush in soc_cleanup_card_resources() after snd_card_disconnect_sync() (after which no new PCM closes can schedule further delayed work) and before soc_remove_link_dais() and soc_remove_link_components() (which tear down the structures the delayed work accesses).
CVE-2026-43459
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-43459
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
"lessThan": "bf80a89da97285d9b877e0c6995e870d46b8025c",
"versionType": "git"
},
{
"status": "affected",
"version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
"lessThan": "3887e514978d28216246360b46a9cb534969eb5a",
"versionType": "git"
},
{
"status": "affected",
"version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
"lessThan": "231568afbc0cd25b8fb2a94ebf9738eabe1cf007",
"versionType": "git"
},
{
"status": "affected",
"version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
"lessThan": "317a9298c54bb00319da73e5a7179f00e67fcbdf",
"versionType": "git"
},
{
"status": "affected",
"version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
"lessThan": "eab71e11ce2447c1e01809cbc11eab4234cf8dc8",
"versionType": "git"
},
{
"status": "affected",
"version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
"lessThan": "7d33e6140945482a07f8089ee86e13e02553ffdb",
"versionType": "git"
},
{
"status": "affected",
"version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
"lessThan": "c054f0607c8bb1b1aa529bc109e4149298a1cccd",
"versionType": "git"
},
{
"status": "affected",
"version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
"lessThan": "95bc5c225513fc3c4ce169563fb5e3929fbb938b",
"versionType": "git"
}
],
"programFiles": [
"sound/soc/soc-core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.20"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.78",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.19",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.9",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/soc/soc-core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43459
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40080 · Revision 1
- Added to Heist Feed
- Publisher date