CVE-2026-43459

HIGH EPSS 1.7%

Published May 8, 20261mo ago · Modified Jun 17, 20261w ago

7.3 CVSS 3.1

High

Published May 8, 2026 1mo ago

Last Modified Jun 17, 2026 1w ago

Description

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).

CVSS Details

Base Score

7.3

Exploitability

1.3

Impact

5.9

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Attack Vector Local

Attack Complexity Low

Privileges Required Low

User Interaction Required

Scope Unchanged

Confidentiality High

Integrity High

Availability High

Threat Intelligence

EPSS Exploit Probability

1.7% percentile

Exploit & Patch Status

No Known Exploit

Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 10

Vendor	Product	Version	Range
linux	linux_kernel	*	≥4.20 – <5.10.253
linux	linux_kernel	*	≥5.11 – <5.15.203
linux	linux_kernel	*	≥5.16 – <6.1.167
linux	linux_kernel	*	≥6.2 – <6.6.130
linux	linux_kernel	*	≥6.7 – <6.12.78
linux	linux_kernel	*	≥6.13 – <6.18.19
linux	linux_kernel	*	≥6.19 – <6.19.9
linux	linux_kernel	7.0	any
linux	linux_kernel	7.0	any
linux	linux_kernel	7.0	any

References 8

git.kernel.org https://git.kernel.org/stable/c/231568afbc0cd25b8fb2a94ebf9738eabe1cf007

Patch
git.kernel.org https://git.kernel.org/stable/c/317a9298c54bb00319da73e5a7179f00e67fcbdf

Patch
git.kernel.org https://git.kernel.org/stable/c/3887e514978d28216246360b46a9cb534969eb5a

Patch
git.kernel.org https://git.kernel.org/stable/c/7d33e6140945482a07f8089ee86e13e02553ffdb

Patch
git.kernel.org https://git.kernel.org/stable/c/95bc5c225513fc3c4ce169563fb5e3929fbb938b

Patch
git.kernel.org https://git.kernel.org/stable/c/bf80a89da97285d9b877e0c6995e870d46b8025c

Patch
git.kernel.org https://git.kernel.org/stable/c/c054f0607c8bb1b1aa529bc109e4149298a1cccd

Patch
git.kernel.org https://git.kernel.org/stable/c/eab71e11ce2447c1e01809cbc11eab4234cf8dc8

Patch

Remediation

git.kernel.org https://git.kernel.org/stable/c/231568afbc0cd25b8fb2a94ebf9738eabe1cf007

Patch
git.kernel.org https://git.kernel.org/stable/c/317a9298c54bb00319da73e5a7179f00e67fcbdf

Patch
git.kernel.org https://git.kernel.org/stable/c/3887e514978d28216246360b46a9cb534969eb5a

Patch
git.kernel.org https://git.kernel.org/stable/c/7d33e6140945482a07f8089ee86e13e02553ffdb

Patch
git.kernel.org https://git.kernel.org/stable/c/95bc5c225513fc3c4ce169563fb5e3929fbb938b

Patch
git.kernel.org https://git.kernel.org/stable/c/bf80a89da97285d9b877e0c6995e870d46b8025c

Patch
git.kernel.org https://git.kernel.org/stable/c/c054f0607c8bb1b1aa529bc109e4149298a1cccd

Patch
git.kernel.org https://git.kernel.org/stable/c/eab71e11ce2447c1e01809cbc11eab4234cf8dc8

Patch