CVE-2024-47143: Linux kernel · dma-debug: fix a possible deadlock on radix_lock
Source GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 30 Oct 2026, 00:57 UTC
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 11 Jan 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
AI-suggested
Until a fix is applied, avoid workloads or configurations that trigger the dma debug API while holding rq_lock, if possible.
Description
CVE-2024-47143 is a medium-severity vulnerability in the Linux kernel's dma-debug subsystem involving a potential deadlock on radix_lock. The issue arises because radix_lock() is held simultaneously with dma_hash_entry[idx].lock, creating a deadlock scenario when the dma debug API is called while holding rq_lock. This deadlock can occur in specific CPU contexts during memory management and hardware tracing operations. The fix involves reordering calls to avoid holding these locks simultaneously.
References
- nvd.nist.gov/vuln/detail/CVE-2024-47143 (opens in a new tab)
- git.kernel.org/stable/c/3ccce34a5c3f5c9541108a451657ade621524b32 (opens in a new tab)
- git.kernel.org/stable/c/7543c3e3b9b88212fcd0aaf5cab5588797bdc7de (opens in a new tab)
- git.kernel.org/stable/c/8c1b4fea8d62285f5e1a8194889b39661608bd8a (opens in a new tab)
- git.kernel.org/stable/c/c212d91070beca0d03fef7bf988baf4ff4b3eee4 (opens in a new tab)
- git.kernel.org/stable/c/efe1b9bbf356357fdff0399af361133d6e3ba18e (opens in a new tab)
- git.kernel.org/stable/c/f2b95248a16c5186d1c658fc0aeb2f3bd95e5259 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/03/msg00001.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/03/msg00002.html (opens in a new tab)