NVD / CVE Program· CNA Linux

CVE-2024-46791: can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open

Noroxi assessment

Priority: Monitor (action score 22/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 3a49b6b1caf5cefc05264d29079d52c99cb188e0, 513c8fc189b52f7922e36bdca58997482b198f0e, 7dd9c26bd6cf679bcfdef01a8659791aa6487a29.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 3a49b6b1caf5cefc05264d29079d52c99cb188e0, 513c8fc189b52f7922e36bdca58997482b198f0e, 7dd9c26bd6cf679bcfdef01a8659791aa6487a29 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Denial of service

BDU:2024-08189

Published: Sep 18, 2024
Updated: Jun 17, 2026
EPSS: 0.1% · 5th percentile
CWE: CWE-667

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel5.5 and later · before 5.10.226
linux linux kernel5.11 and later · before 5.15.167
linux linux kernel5.16 and later · before 6.1.110
linux linux kernel6.2 and later · before 6.6.51
linux linux kernel6.7 and later · before 6.10.10
linux linux kernel6.11

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 5.5affected
- 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef and later · before 3a49b6b1caf5cefc05264d29079d52c99cb188e0affected · git
- 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef and later · before 513c8fc189b52f7922e36bdca58997482b198f0eaffected · git
- 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef and later · before f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646affected · git
- 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef and later · before 8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7affected · git
- 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef and later · before e554113a1cd2a9cfc6c7af7bdea2141c5757e188affected · git
- 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef and later · before 7dd9c26bd6cf679bcfdef01a8659791aa6487a29affected · git
- before 5.5not affected · semver
- 5.10.226 and later · up to and including 5.10.*not affected · semver
- 5.15.167 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.112-1	6.1.112-1
Debian:13	linux	before 6.10.11-1	6.10.11-1

Same product

linux: all records

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Published before and after this one in the same product

← EarlierCVE-2024-46789Sep 18, 2024 · mm/slub: add check for s->flags in the alloc_tagging_slab_free_hook
22Monitor
← EarlierCVE-2024-46790Sep 18, 2024 · codetag: debug: mark codetags for poisoned page as empty
22Monitor
Later →CVE-2024-46792Sep 18, 2024 · riscv: misaligned: Restrict user access to kernel memory
13Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	3a49b6b1caf5cefc05264d29079d52c99cb188e0	Vendor (CNA)
Linux Linux	513c8fc189b52f7922e36bdca58997482b198f0e	Vendor (CNA)
Linux Linux	7dd9c26bd6cf679bcfdef01a8659791aa6487a29	Vendor (CNA)
Linux Linux	8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7	Vendor (CNA)
Linux Linux	e554113a1cd2a9cfc6c7af7bdea2141c5757e188	Vendor (CNA)
Linux Linux	f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646	Vendor (CNA)
debian:linux	6.1.112-1 · Debian:12	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).