CVE-2025-68210: Linux kernel · erofs: avoid infinite loop due to incomplete zstd-compressed data
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 6.17.0-1007.7~24.04.1 : 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 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 6.17.0-1007.7~24.04.1, 6.17.0-1008.8~24.04.1, 6.17.0-1008.8 +6
Exploitation evidence
Disclosed: evidence found.
CVE published 16 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.
Patches and advisories
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
An official patch is available and should be applied promptly. Users should update their Linux kernel to the fixed versions as provided by their vendor (e.g., Ubuntu security notices USN-8029-1 and USN-8030-1). After updating, a system reboot is required to activate the fixes. Due to an ABI change in the kernel update, all third-party kernel modules must be recompiled and reinstalled. Following these steps will mitigate the vulnerability effectively.
Description
A vulnerability in the Linux kernel's erofs file system decompression logic could cause an infinite loop when processing incomplete zstd-compressed data. This issue occurs if compressed data is truncated in crafted images, leading to the decompression code spinning indefinitely. The vulnerability has been addressed in updated Linux kernel versions. Users should apply the official patches and reboot to mitigate the issue. The update may require recompiling third-party kernel modules due to ABI changes.
References
- ubuntu.com/security/CVE-2025-68210 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-68210 (opens in a new tab)
- git.kernel.org/linus/f2a12cc3b97f062186568a7b94ddb7aa2ef68140 (opens in a new tab)
- git.kernel.org/stable/c/1f86d73a0afe43b6a85d2aa8207853350b7e2111 (opens in a new tab)
- git.kernel.org/stable/c/4d0e0bb1908acac5b27d30b45c450e8ead97eb00 (opens in a new tab)
- git.kernel.org/stable/c/f2a12cc3b97f062186568a7b94ddb7aa2ef68140 (opens in a new tab)
- ubuntu.com/security/notices/USN-8029-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8030-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8029-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8048-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8029-3 (opens in a new tab)