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CVE-2026-89892

media: em28xx: defer audio-only extension registration

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: media: em28xx: defer audio-only extension registration The audio-only path registers extensions while probing the primary device. For a dual-TS board, this happens before dev_next is created. The duplicate device inherits is_audio_only and is then independently inserted into em28xx_devlist. The list is intended to contain only primary devices: extension operations reach the secondary device through dev_next. The independently linked secondary can be freed during disconnect while its list node remains reachable, resulting in a use-after-free. Defer audio-only extension registration to the module-request work item. It runs only after probing has completed construction of the optional secondary device, so only the primary is registered and extension callbacks reach the secondary through dev_next.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 4a089668ef22c295ed4997289cc48446c849249c · fixed in 0da1e627f4fc9d0e947fdae90913042120878923; From 4a089668ef22c295ed4997289cc48446c849249c · fixed in f8d7e77d9c621b42a191c67a9b37bec23dc1d555; From 4a089668ef22c295ed4997289cc48446c849249c · fixed in 1abe9524dec0fd26e9ceb8d586034d6f68dd8273; From 4a089668ef22c295ed4997289cc48446c849249c · fixed in 4e11c45dfdc72ab656067b1df8fcebaf52fd4715; From 4a089668ef22c295ed4997289cc48446c849249c · fixed in d06067ee32620f272cfb80c7bc7c572ad4e74724; From 4a089668ef22c295ed4997289cc48446c849249c · fixed in f9322ac9f862961d7f377b87ec26c8565af7e073; From 4a089668ef22c295ed4997289cc48446c849249c · fixed in 4666197ca4f7d80cd3b0292054fe45d76be9ba04; From 4a089668ef22c295ed4997289cc48446c849249c · fixed in 95f76f51937fdfb0fc1e14cae606b1ef574a56f3

  • Linux Linux

    4.17

  • KernelLinux

    From 4.17.0 · fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.51; From 6.19.0 · fixed in 7.2.5

References 8

git.kernel.org