CVE-2025-68342: Linux kernel · can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing data
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, 14:05 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
An official fix is available and should be applied by upgrading to patched linux-aws kernel versions 6.8.0-1049.49 or later. Users should follow the Ubuntu security advisory USN-8094-1 for detailed update instructions.
Description
A vulnerability in the Linux kernel's gs_usb driver (CVE-2025-68342) was resolved by adding checks on the actual length of received data before accessing it. This prevents improper data access in the gs_usb_receive_bulk_callback() function. The issue affects specific linux-aws kernel versions prior to 6.8.0-1049.49 through 6.8.0-106.106~22.04.1. The vulnerability is medium severity and has been officially fixed in updated kernel releases.
References
- ubuntu.com/security/CVE-2025-68342 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-68342 (opens in a new tab)
- git.kernel.org/linus/395d988f93861101ec89d0dd9e3b876ae9392a5b (opens in a new tab)
- git.kernel.org/stable/c/395d988f93861101ec89d0dd9e3b876ae9392a5b (opens in a new tab)
- git.kernel.org/stable/c/4ffac725154cf6a253f5e6aa0c8946232b6a0af5 (opens in a new tab)
- git.kernel.org/stable/c/ad55004a3cb5b41ef78aa6c09e7bc5a489ba652b (opens in a new tab)
- git.kernel.org/stable/c/fb0c7c77a7ae3a2c3404b7d0173b8739a754b513 (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)
- ubuntu.com/security/notices/USN-8095-5 (opens in a new tab)