CVE-2026-43459 (GCVE-0-2026-43459)
Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-11 22:24
VLAI?
Title
ASoC: soc-core: flush delayed work before removing DAIs and widgets
Summary
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).
Severity ?
7.3 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
e894efef9ac7c10b7727798dcc711cccf07569f9 , < bf80a89da97285d9b877e0c6995e870d46b8025c
(git)
Affected: e894efef9ac7c10b7727798dcc711cccf07569f9 , < 3887e514978d28216246360b46a9cb534969eb5a (git) Affected: e894efef9ac7c10b7727798dcc711cccf07569f9 , < 231568afbc0cd25b8fb2a94ebf9738eabe1cf007 (git) Affected: e894efef9ac7c10b7727798dcc711cccf07569f9 , < 317a9298c54bb00319da73e5a7179f00e67fcbdf (git) Affected: e894efef9ac7c10b7727798dcc711cccf07569f9 , < eab71e11ce2447c1e01809cbc11eab4234cf8dc8 (git) Affected: e894efef9ac7c10b7727798dcc711cccf07569f9 , < 7d33e6140945482a07f8089ee86e13e02553ffdb (git) Affected: e894efef9ac7c10b7727798dcc711cccf07569f9 , < c054f0607c8bb1b1aa529bc109e4149298a1cccd (git) Affected: e894efef9ac7c10b7727798dcc711cccf07569f9 , < 95bc5c225513fc3c4ce169563fb5e3929fbb938b (git) |
|
| Linux | Linux |
Affected:
4.20
Unaffected: 0 , < 4.20 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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