CVE-2024-49985: Linux kernel · i2c: stm32f7: Do not prepare/unprepare clock during runtime suspend/resume
Source GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 29 Oct 2026, 23:46 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 21 Oct 2024
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
A fix has been implemented in the Linux kernel to avoid the deadlock by replacing clk_prepare/unprepare calls with clk_enable/disable during runtime suspend and resume. Users should update to a kernel version that includes this fix. No additional mitigation steps are indicated.
Description
CVE-2024-49985 is a medium-severity vulnerability in the Linux kernel's i2c driver for stm32f7. It involves a deadlock condition triggered during runtime suspend/resume when clock controllers attached to the I2C bus perform clock preparation operations. The deadlock occurs due to recursive locking of the prepare_lock mutex, which can cause the system to hang. The issue is resolved by changing the clock enable/disable calls during runtime suspend/resume to avoid the problematic prepare/unprepare calls.
References
- nvd.nist.gov/vuln/detail/CVE-2024-49985 (opens in a new tab)
- git.kernel.org/stable/c/048bbbdbf85e5e00258dfb12f5e368f908801d7b (opens in a new tab)
- git.kernel.org/stable/c/1883cad2cc629ded4a3556c0bbb8b42533ad8764 (opens in a new tab)
- git.kernel.org/stable/c/22a1f8a5b56ba93d3e8b7a1dafa24e01c8bb48ba (opens in a new tab)
- git.kernel.org/stable/c/894cd5f5fd9061983445bbd1fa3d81be43095344 (opens in a new tab)
- git.kernel.org/stable/c/9b8bc33ad64192f54142396470cc34ce539a8940 (opens in a new tab)
- git.kernel.org/stable/c/c2024b1a583ab9176c797ea1e5f57baf8d5e2682 (opens in a new tab)
- git.kernel.org/stable/c/d6f1250a4d5773f447740b9fe37b8692105796d4 (opens in a new tab)
- git.kernel.org/stable/c/fac3c9f7784e8184c0338e9f0877b81e55d3ef1c (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/03/msg00002.html (opens in a new tab)