CVE-2024-56531ALSA: caiaq: Use snd_card_free_when_closed() at disconnection
- 7.8HighCVSS base score
- 0.22%Exploitation in 30 daysEPSS · top 87% 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: ALSA: caiaq: Use snd_card_free_when_closed() at disconnection The USB disconnect callback is supposed to be short and not too-long waiting. OTOH, the current code uses snd_card_free() at disconnection, but this waits for the close of all used fds, hence it can take long. It eventually blocks the upper layer USB ioctls, which may trigger a soft lockup. An easy workaround is to replace snd_card_free() with snd_card_free_when_closed(). This variant returns immediately while the release of resources is done asynchronously by the card device release at the last close. This patch also splits the code to the disconnect and the free phases; the former is called immediately at the USB disconnect callback while the latter is called from the card destructor.
Timeline
ID reserved
By Linux
Published
- 20 months later
· 20 months 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 |
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c – < 3993edf44d3df7b6e8c753eac6ac8783473fcbab
- affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c – < ebad462eec93b0f701dfe4de98990e7355283801
- affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c – < 4dd821dcbfcecf7af6a08370b0b217cde2818acf
- affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c – < cadf1d8e9ddcd74584ec961aeac14ac549b261d8
- affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c – < 237f3faf0177bdde728fa3106d730d806436aa4d
- affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c – < 4507a8b9b30344c5ddd8219945f446d47e966a6d
- affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c – < dd0de8cb708951cebf727aa045e8242ba651bb52
- affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c – < a3f9314752dbb6f6aa1f0f2b4c58243bda800738
- affected 523f1dce37434a9a6623bf46e7893e2b4b10ac3c – < b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c
- affected 2.6.22
- unaffected < 2.6.22
- unaffected 4.19.325 – ≤ 4.19.*
- unaffected 5.4.287 – ≤ 5.4.*
- unaffected 5.10.231 – ≤ 5.10.*
- unaffected 5.15.174 – ≤ 5.15.*
- unaffected 6.1.120 – ≤ 6.1.*
- unaffected 6.6.64 – ≤ 6.6.*
- unaffected 6.11.11 – ≤ 6.11.*
- unaffected 6.12.2 – ≤ 6.12.*
- unaffected 6.13 – ≤ *
References
References11
- https://git.kernel.org/stable/c/3993edf44d3df7b6e8c753eac6ac8783473fcbab (opens in a new tab)
- https://git.kernel.org/stable/c/ebad462eec93b0f701dfe4de98990e7355283801 (opens in a new tab)
- https://git.kernel.org/stable/c/4dd821dcbfcecf7af6a08370b0b217cde2818acf (opens in a new tab)
- https://git.kernel.org/stable/c/cadf1d8e9ddcd74584ec961aeac14ac549b261d8 (opens in a new tab)
- https://git.kernel.org/stable/c/237f3faf0177bdde728fa3106d730d806436aa4d (opens in a new tab)
- https://git.kernel.org/stable/c/4507a8b9b30344c5ddd8219945f446d47e966a6d (opens in a new tab)
- https://git.kernel.org/stable/c/dd0de8cb708951cebf727aa045e8242ba651bb52 (opens in a new tab)
- https://git.kernel.org/stable/c/a3f9314752dbb6f6aa1f0f2b4c58243bda800738 (opens in a new tab)
- https://git.kernel.org/stable/c/b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html (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-2024-53179 (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-2024-56531)Record last updated .