CVE-2026-74460: Linux kernel · can: ems_usb: validate CPC message lengths
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1117.124~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +27
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: validate CPC message lengths ems_usb_read_bulk_callback() walks CPC messages packed in one USB receive buffer. Check that each declared message fits in the URB payload. Also require the type-specific payload to cover the fields used by the CAN, state, error and overrun handlers.
References
- ubuntu.com/security/CVE-2026-74460 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-74460 (opens in a new tab)
- git.kernel.org/linus/02925f51377f2a42a6724f00549167499c9302e5 (opens in a new tab)
- git.kernel.org/stable/c/02925f51377f2a42a6724f00549167499c9302e5 (opens in a new tab)
- git.kernel.org/stable/c/0b23144c59c126beb4a7761a85a194ae0fe668a5 (opens in a new tab)
- git.kernel.org/stable/c/0b9090717c7e2184e2c427bbcc752f295116ac1d (opens in a new tab)
- git.kernel.org/stable/c/ce8125566b1d0b0f16449407e014addf451804ea (opens in a new tab)
- git.kernel.org/stable/c/df3ac2a672a5284441f120d486acabdd6740fc2a (opens in a new tab)
- msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74460.json (opens in a new tab)
- support.microsoft.com/lifecycle (opens in a new tab)
- first.org/cvss (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-74460 (opens in a new tab)
- git.kernel.org/stable/c/1c380a332e342b7d58c86c4f556cb0823b16a9b8 (opens in a new tab)
- git.kernel.org/stable/c/bb3cc8da8a2967c0f8e83d148fc6870b19fa32c6 (opens in a new tab)
- git.kernel.org/stable/c/db5655287d78f00daf98888a520bb8da4d30126d (opens in a new tab)
- ubuntu.com/security/notices/USN-8876-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-2 (opens in a new tab)