CVE-2025-68813: Linux kernel · ipvs: fix ipv4 null-ptr-deref in route error path
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1103.110~20.04.1 : 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
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1103.110~20.04.1, 5.15.0-1110.119~20.04.1, 5.15.0-1103.112~20.04.1 +70
Exploitation evidence
Disclosed: evidence found.
CVE published 13 Jan 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 25.10linuxpkg:deb/ubuntu/linux@6.17.0-22.22?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws@6.17.0-1012.12?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure@6.17.0-1013.13?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@6.17.0-1012.12?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle@6.17.0-1011.11?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 security update fixing this vulnerability is available from SUSE and Ubuntu. Users should apply the official Linux kernel patches or live patches provided by their vendor to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
Description
A null pointer dereference vulnerability in the Linux kernel's IP Virtual Server (IPVS) IPv4 code path was fixed. The flaw occurs when a route lookup fails and the error path calls dst_link_failure() with a NULL skb->dev pointer, leading to a kernel crash. This happens specifically when IPVS processes a packet in NAT mode with a misconfigured destination. The issue was caused by incomplete handling of skb->dev in the error path, resulting in a NULL pointer dereference in fib_compute_spec_dst(). A security update addressing this and other Linux kernel vulnerabilities has been released by SUSE and Ubuntu.
References
- ubuntu.com/security/CVE-2025-68813 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-68813 (opens in a new tab)
- git.kernel.org/linus/ad891bb3d079a46a821bf2b8867854645191bab0 (opens in a new tab)
- git.kernel.org/stable/c/25ab24df31f7af843c96a38e0781b9165216e1a8 (opens in a new tab)
- git.kernel.org/stable/c/4729ff0581fbb7ad098b6153b76b6f5aac94618a (opens in a new tab)
- git.kernel.org/stable/c/689a627d14788ad772e0fa24c2e57a23dbc7ce90 (opens in a new tab)
- git.kernel.org/stable/c/ad891bb3d079a46a821bf2b8867854645191bab0 (opens in a new tab)
- git.kernel.org/stable/c/cdeff10851c37a002d87a035818ebd60fdb74447 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8116-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-8141-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8163-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8163-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8177-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8179-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8177-2 (opens in a new tab)
- suse.com/support/security/rating/ (opens in a new tab)
- ftp.suse.com/pub/projects/security/csaf/suse-su-2026_20836-1.json (opens in a new tab)
- suse.com/support/update/announcement/2026/suse-su-202620836-1/ (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2026-March/025001.html (opens in a new tab)
- bugzilla.suse.com/1256624 (opens in a new tab)
- bugzilla.suse.com/1256644 (opens in a new tab)
- suse.com/security/cve/CVE-2025-68813/ (opens in a new tab)
- suse.com/security/cve/CVE-2025-71085/ (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2025-68813 (opens in a new tab)
- git.kernel.org/stable/c/312d7cd88882fc6cadcc08b02287497aaaf94bcd (opens in a new tab)
- git.kernel.org/stable/c/dd72a93c80408f06327dd2d956eb1a656d0b5903 (opens in a new tab)