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VulnerabilityPublished Updated

CVE-2026-40337: camelot-os sentry-kernel · Unverified Ownership

Affects camelot-os sentry-kernelSource CVE Database V5

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Not known to be exploited · CVSS 5.1 Medium : upgrade to 0.4.7 when convenient.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.4.7
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

Upgrade sentry-kernel and camelot-os/sentry-kernel to 0.4.7.

Affected software

ProductAffectedFixed in
camelot-ossentry-kernelAffected
  • <0.4.7
Fixed in
  • 0.4.7
GitHubcamelot-os/sentry-kernelpkg:github/camelot-os/sentry-kernelOther threatsAffected
  • <0.4.7
Fixed in
  • 0.4.7

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available in camelot-os sentry-kernel version 0.4.7 that addresses this vulnerability. Users should upgrade to version 0.4.7 or later. As a temporary workaround before patching, it is recommended to reduce the number of tasks with DEV and IO capabilities to a single task to limit the attack surface.

Description

The Sentry kernel is a high security level micro-kernel implementation made for high security embedded systems. A given task with one of the DEV or IO capability is able to interact with another task's IRQ line through the __sys_int_* syscall familly. Prior to version 0.4.7, this can lead to DoS and covert-channels between this task and the outer world. A patch is available in version 0.4.7. As a workaround, reduce tasks that have the DEV and IO capability to a single one.

References

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