5.5

CVE-2024-56532: linux Improper Locking

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2024-56532DEBIAN-CVE-2024-56532
Published 27-12-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2024-56532 is a medium (CVSS 5.5) Improper Locking vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.3% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · 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-2025:0289-1SUSE-SU-2025:0428-1SUSE-SU-2025:0499-1SUSE-SU-2025:0556-1

Timeline

  1. 27-12-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: us122l: 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. The loop of us122l->mmap_count check is dropped as well. The check is useless for the asynchronous operation with *_when_closed().

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 19-09-2026

19-09-202619-10-2026
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≥ 030a07e441296c372f946cd4065b5d831d8dc40c, < 020cbc4d7414f0962004213e2b7bc5cc607e9ec7 | ≥ 030a07e441296c372f946cd4065b5d831d8dc40c, < 75f418b249d84021865eaa59515d3ed9b75ce4d6 | ≥ 030a07e441296c372f946cd4065b5d831d8dc40c, < bf0aa35a7cb8602cccf2387712114e836f65c154 | ≥ 030a07e441296c372f946cd4065b5d831d8dc40c, < 9a48bd2184b142c92a4e17eac074c61fcf975bc9 | ≥ 030a07e441296c372f946cd4065b5d831d8dc40c, < bc778ad3e495333eebda36fe91d5b2c93109cc16 | ≥ 030a07e441296c372f946cd4065b5d831d8dc40c, < 2938dd2648522336133c151dd67bb9bf01cbd390 | ≥ 030a07e441296c372f946cd4065b5d831d8dc40c, < 9b27924dc8d7f8a8c35e521287d4ccb9a006e597 | ≥ 030a07e441296c372f946cd4065b5d831d8dc40c, < 9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38 | ≥ 030a07e441296c372f946cd4065b5d831d8dc40c, < b7df09bb348016943f56b09dcaafe221e3f73947 | 2.6.28
  • linux_kernel≥ 2.6.28, < 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