CVE-2025-68338: Linux kernel · net: dsa: microchip: Don't free uninitialized ksz_irq
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 6.17.0-1009.9~24.04.2 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- 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 6.17.0-1009.9~24.04.2, 6.17.0-1010.10~24.04.1, 6.17.0-1009.9~24.04.3 +11
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?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle?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 is available and should be applied. The issue has been fixed in linux-hwe-edge kernel versions 6.17.0-1009.9~24.04.2 and later. Users should update to these fixed versions to remediate the vulnerability.
Description
A vulnerability in the Linux kernel's net: dsa: microchip driver was resolved, where an uninitialized IRQ resource (ksz_irq) could be freed if an error occurred during setup. This could lead to freeing uninitialized IRQ numbers or domains. The issue was fixed by ensuring only fully initialized ports are iterated over in the error path. The vulnerability affects certain versions of the linux-hwe-edge kernel prior to specific 6.17.0 builds.
References
- ubuntu.com/security/CVE-2025-68338 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-68338 (opens in a new tab)
- git.kernel.org/linus/25b62cc5b22c45face094ae3e8717258e46d1d19 (opens in a new tab)
- git.kernel.org/stable/c/25b62cc5b22c45face094ae3e8717258e46d1d19 (opens in a new tab)
- git.kernel.org/stable/c/32abbcf4379a0f851d7eb9d4389e7bf5c64bf6c0 (opens in a new tab)
- git.kernel.org/stable/c/9428654c827fa8d38b898135d26d39ee2d544246 (opens in a new tab)
- ubuntu.com/security/notices/USN-8094-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8094-2 (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-8094-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-8152-1 (opens in a new tab)