CVE-2023-52774: s390/dasd: protect device queue against concurrent access

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-21 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: protect device queue against concurrent access In dasd_profile_start() the amount of requests on the device queue are counted. The access to the device queue is unprotected against concurrent access. With a lot of parallel I/O, especially with alias devices enabled, the device queue can change while dasd_profile_start() is accessing the queue. In the worst case this leads to a kernel panic due to incorrect pointer accesses. Fix this by taking the device lock before accessing the queue and counting the requests. Additionally the check for a valid profile data pointer can be done earlier to avoid unnecessary locking in a hot path.

Affected products

Linux kernel: from 3.1 before 4.14.332; from 4.15 before 4.19.301; from 4.20 before 5.4.263; from 5.5 before 5.10.203; from 5.11 before 5.15.141; from 5.16 before 6.1.65 — fixed in 4.14.332, 4.19.301, 5.10.203, 5.15.141, 5.4.263, 6.1.65

How to fix

Upgrade to a fixed version: Linux kernel 4.14.332, 4.19.301, 5.10.203, 5.15.141. Check the vendor advisory for mitigations.

References

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