CVE-2025-68343: Linux kernel · can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 6.8.0-1050.53~22.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 10:12 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 6.8.0-1050.53~22.04.1, 6.8.0-1051.57~22.04.1, 6.8.0-1052.55~22.04.1 +40
Exploitation evidence
Disclosed: evidence found.
CVE published 23 Dec 2025
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 25.10linuxpkg:deb/ubuntu/linux@6.17.0-19.19?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws@6.17.0-1009.9?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure@6.17.0-1010.10?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde@6.17.0-1017.17?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp@6.17.0-1009.9?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle@6.17.0-1009.9?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch addressing this vulnerability is available and included in linux-aws kernel versions 6.8.0-1049.49~22.04.1 and later. Users should update their linux-aws kernel to these or newer versions to remediate the issue. No additional mitigation steps are required beyond applying the official fix.
Description
A vulnerability in the Linux kernel's gs_usb driver (CVE-2025-68343) was resolved by adding checks on the actual_length before accessing the gs_host_frame header. This prevents dereferencing potentially invalid pointers when processing USB bulk callbacks. The issue affected specific linux-aws kernel versions prior to 6.8.0-1049.49~22.04.1 and similar builds. The vulnerability could lead to improper memory access. A patch is available and included in updated linux-aws kernel releases.
References
- ubuntu.com/security/CVE-2025-68343 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-68343 (opens in a new tab)
- git.kernel.org/linus/6fe9f3279f7d2518439a7962c5870c6e9ecbadcf (opens in a new tab)
- git.kernel.org/stable/c/18cbce43363c9f84b90a92d57df341155eee0697 (opens in a new tab)
- git.kernel.org/stable/c/3433680b759646efcacc64fe36aa2e51ae34b8f0 (opens in a new tab)
- git.kernel.org/stable/c/616eee3e895b8ca0028163fcb1dce5e3e9dea322 (opens in a new tab)
- git.kernel.org/stable/c/6fe9f3279f7d2518439a7962c5870c6e9ecbadcf (opens in a new tab)
- git.kernel.org/stable/c/f31693dc3a584c0ad3937e857b59dbc1a7ed2b87 (opens in a new tab)
- ubuntu.com/security/notices/USN-8094-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8095-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8100-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8095-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8094-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8095-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8095-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8094-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8094-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8125-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8126-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8094-5 (opens in a new tab)