- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_audio: Fix use-after-free on sound card disconnect g_audio_cleanup() invokes snd_card_free_when_closed() to initiate sound card teardown and immediately frees the underlying struct snd_uac_chip context. However, snd_card_free_when_closed() returns asynchronously while ALSA control elements (kctls) remain open in userspace. When userspace control applications access or close these open file descriptors, kctl callbacks attempt to dereference kctl->private_data pointing to &uac->c_prm or &uac->p_prm within the freed uac structure, resulting in a use-after-free (UAF) memory corruption. Fix this issue by deferring the destruction of struct snd_uac_chip until all references to the ALSA sound card are released. Register a custom card->private_free callback (u_audio_card_free) during g_audio_setup() that frees uac and its associated playback/capture request and ring buffers only when the sound card reference count drops to zero.
Timeline
ID reserved
By Linux
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 98% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 33f341c1fc60e172a3515c51bdabee11e83d1ee9 – < a7ecd1a04f4f485d7be6443d0f0b2c61a800cb82
- affected b131989797f7287d7fdadb2bababc05a15d44750 – < f983793f03148b097977f200298db215cd2d4438
- affected 3bc7324e4911351e39c54a62e6ca46321cb10faf – < 6f46762196f04464e1050a9ee94e72b917db9010
- affected 6c67ed9ad9b83e453e808f9b31a931a20a25629b – < 891a8d11f4d5eb50b2ce7570f4f98204a7a57493
- affected 6c67ed9ad9b83e453e808f9b31a931a20a25629b – < c74ff0b1a0fca53d3ac185873c87d6a719b30a47
- affected 6c67ed9ad9b83e453e808f9b31a931a20a25629b – < 4e747c864a88537e18b1ffc19a1954c9686bb8e1
- affected 6c67ed9ad9b83e453e808f9b31a931a20a25629b – < 79a92896e2bb9471550c56fc23d8d93592f04c27
- affected 6c67ed9ad9b83e453e808f9b31a931a20a25629b – < 858965947081d10d41d9a1010a540d3d5eea958b
- affected 3e016ef2e72da93a2ea7afbb45de1b481b44d761
- affected 3256e152b645fc1e788ba44c2d8ced690113e3e6
- affected 0eda2004f38d95ef5715d62be884cd344260535b
- affected 43ca70753dfffd517d2af126da28690f8f615605
- affected 5.10.177 – < 5.10.270
- affected 5.15.105 – < 5.15.221
- affected 6.1.22 – < 6.1.188
- affected 4.14.312 – < 4.15
- affected 4.19.280 – < 4.20
- affected 5.4.240 – < 5.5
- affected 6.2.9 – < 6.3
- affected 6.3
- unaffected < 6.3
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/a7ecd1a04f4f485d7be6443d0f0b2c61a800cb82 (opens in a new tab)
- https://git.kernel.org/stable/c/f983793f03148b097977f200298db215cd2d4438 (opens in a new tab)
- https://git.kernel.org/stable/c/6f46762196f04464e1050a9ee94e72b917db9010 (opens in a new tab)
- https://git.kernel.org/stable/c/891a8d11f4d5eb50b2ce7570f4f98204a7a57493 (opens in a new tab)
- https://git.kernel.org/stable/c/c74ff0b1a0fca53d3ac185873c87d6a719b30a47 (opens in a new tab)
- https://git.kernel.org/stable/c/4e747c864a88537e18b1ffc19a1954c9686bb8e1 (opens in a new tab)
- https://git.kernel.org/stable/c/79a92896e2bb9471550c56fc23d8d93592f04c27 (opens in a new tab)
- https://git.kernel.org/stable/c/858965947081d10d41d9a1010a540d3d5eea958b (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76648 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89736)Record last updated .