CVE-2026-23119: Linux kernel · bonding: provide a net pointer to __skb_flow_dissect()
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium · fixed in 5.15.0-1105.112~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1105.112~20.04.1, 5.15.0-1110.119~20.04.1, 5.15.0-1106.115~20.04.1 +59
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 14 Feb 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@6.17.0-40.40?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws@6.17.0-1019.19?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure@6.17.0-1020.20?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@6.17.0-1020.22?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle@6.17.0-1018.18?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 from the vendor and should be applied promptly. The Ubuntu advisory USN-8162-1 provides updated kernel packages for affected versions. After applying the update, a system reboot is required. Note that due to an ABI change, third-party kernel modules must be recompiled and reinstalled. No additional mitigation steps are indicated by the vendor.
Description
A vulnerability in the Linux kernel's bonding driver was resolved by ensuring a proper net pointer is provided to the __skb_flow_dissect() function. This issue was identified after a commit that introduced network namespace plumbing into __skb_flow_dissect(). The flaw allowed syzbot to craft a bare skb, potentially causing a denial of service. The vulnerability affects specific Linux kernel versions used in the linux-hwe-edge product. A patch is available and should be applied to mitigate the issue.
References
- ubuntu.com/security/CVE-2026-23119 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-23119 (opens in a new tab)
- git.kernel.org/linus/5f9b329096596b7e53e07d041d7fca4cbe1be752 (opens in a new tab)
- git.kernel.org/stable/c/0efee0b992f28bd5ee01c7a86ef6a307c42eb907 (opens in a new tab)
- git.kernel.org/stable/c/3be945abdd228fd00f6afcf8d137002867a4651b (opens in a new tab)
- git.kernel.org/stable/c/5f9b329096596b7e53e07d041d7fca4cbe1be752 (opens in a new tab)
- git.kernel.org/stable/c/8e53780732ee881394406f79da5263b81eb48f7e (opens in a new tab)
- git.kernel.org/stable/c/bc3c8d2493c6f4d2038844dc8b7ee93de050f7fa (opens in a new tab)
- git.kernel.org/stable/c/de97735a40a144974bf3896ee4cc0270db2e47db (opens in a new tab)
- git.kernel.org/stable/c/f4faaa1297ecf3255a8591fff2633df05bd5ec84 (opens in a new tab)
- ubuntu.com/security/notices/USN-8162-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8180-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8180-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8186-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8187-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8188-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8180-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8180-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8180-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-8243-1 (opens in a new tab)