CVE-2024-46791can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open
- 5.5MediumCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open The mcp251x_hw_wake() function is called with the mpc_lock mutex held and disables the interrupt handler so that no interrupts can be processed while waking the device. If an interrupt has already occurred then waiting for the interrupt handler to complete will deadlock because it will be trying to acquire the same mutex. CPU0 CPU1 ---- ---- mcp251x_open() mutex_lock(&priv->mcp_lock) request_threaded_irq() <interrupt> mcp251x_can_ist() mutex_lock(&priv->mcp_lock) mcp251x_hw_wake() disable_irq() <-- deadlock Use disable_irq_nosync() instead because the interrupt handler does everything while holding the mutex so it doesn't matter if it's still running.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 20 months later
· 20 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef – < 3a49b6b1caf5cefc05264d29079d52c99cb188e0
- affected 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef – < 513c8fc189b52f7922e36bdca58997482b198f0e
- affected 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef – < f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646
- affected 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef – < 8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7
- affected 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef – < e554113a1cd2a9cfc6c7af7bdea2141c5757e188
- affected 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef – < 7dd9c26bd6cf679bcfdef01a8659791aa6487a29
- affected 5.5
- unaffected < 5.5
- unaffected 5.10.226 – ≤ 5.10.*
- unaffected 5.15.167 – ≤ 5.15.*
- unaffected 6.1.110 – ≤ 6.1.*
- unaffected 6.6.51 – ≤ 6.6.*
- unaffected 6.10.10 – ≤ 6.10.*
- unaffected 6.11 – ≤ *
References
References8
- https://git.kernel.org/stable/c/3a49b6b1caf5cefc05264d29079d52c99cb188e0 (opens in a new tab)
- https://git.kernel.org/stable/c/513c8fc189b52f7922e36bdca58997482b198f0e (opens in a new tab)
- https://git.kernel.org/stable/c/f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646 (opens in a new tab)
- https://git.kernel.org/stable/c/8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7 (opens in a new tab)
- https://git.kernel.org/stable/c/e554113a1cd2a9cfc6c7af7bdea2141c5757e188 (opens in a new tab)
- https://git.kernel.org/stable/c/7dd9c26bd6cf679bcfdef01a8659791aa6487a29 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-42052 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-46791)Record last updated .