7.8

CVE-2024-56531: linux Improper Locking

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2024-56531DEBIAN-CVE-2024-56531
Published 27-12-2024Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2024-56531 is a high (CVSS 7.8) Improper Locking vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.1% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 46 · Related 46
DLA-4075-1DLA-4076-1SUSE-SU-2025:0236-1SUSE-SU-2025:0289-1SUSE-SU-2025:0428-1SUSE-SU-2025:0499-1

Timeline

  1. 27-12-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

0.00 pp

From 0.22% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu134 products
  • linuxAll versions (No fix recorded) | < 5.4.0-211.231 | < 5.15.0-135.146 | < 6.8.0-58.60
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1142.152 | < 5.15.0-1080.87 | < 6.8.0-1027.29
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, < 3993edf44d3df7b6e8c753eac6ac8783473fcbab | ≥ 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, < ebad462eec93b0f701dfe4de98990e7355283801 | ≥ 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, < 4dd821dcbfcecf7af6a08370b0b217cde2818acf | ≥ 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, < cadf1d8e9ddcd74584ec961aeac14ac549b261d8 | ≥ 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, < 237f3faf0177bdde728fa3106d730d806436aa4d | ≥ 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, < 4507a8b9b30344c5ddd8219945f446d47e966a6d | ≥ 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, < dd0de8cb708951cebf727aa045e8242ba651bb52 | ≥ 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, < a3f9314752dbb6f6aa1f0f2b4c58243bda800738 | ≥ 523f1dce37434a9a6623bf46e7893e2b4b10ac3c, < b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c | 2.6.22
  • linux_kernel≥ 2.6.22, < 4.19.325 | ≥ 4.20, < 5.4.287 | ≥ 5.5, < 5.10.231 | ≥ 5.11, < 5.15.174 | ≥ 5.16, < 6.1.120 | ≥ 6.2, < 6.6.64 | ≥ 6.7, < 6.11.11 | ≥ 6.12, < 6.12.2
Debian1 product
  • linux< 6.1.123-1 | < 6.12.3-1

3 vendors · 137 products

References

49 links
Show all 49 references