CVE-2026-23099: Linux kernel · bonding: limit BOND_MODE_8023AD to Ethernet devices
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.1 High · fixed in 5.15.0-1105.112~20.04.1 : patch Linux kernel soon.
Data as of 26 Oct 2026, 13:47 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% 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:H/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 4 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 and should be applied by updating to the fixed Linux kernel versions provided by the vendor, such as the linux-nvidia-tegra 5.15.0-1057.57~20.04.1 packages for Ubuntu 20.04 LTS. After updating, a system reboot is required. Due to ABI changes, third-party kernel modules must be recompiled and reinstalled. No additional mitigations are indicated by the vendor advisory.
Description
A vulnerability in the Linux kernel bonding driver was resolved that limited the BOND_MODE_8023AD mode to Ethernet devices only. The issue involved a global out-of-bounds memory access detected by KASAN in the dev_addr_lists.c code, specifically related to the lacpdu_mcast_addr variable. This flaw could lead to a denial of service or system crash due to memory corruption. The vulnerability affects specific Linux kernel versions and has a CVSS score of 7.1, indicating medium severity. A patch is available and included in updated Linux kernel packages, particularly for Ubuntu NVIDIA Tegra systems.
References
- ubuntu.com/security/CVE-2026-23099 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-23099 (opens in a new tab)
- git.kernel.org/linus/c84fcb79e5dbde0b8d5aeeaf04282d2149aebcf6 (opens in a new tab)
- git.kernel.org/stable/c/43dee6f7ef1d228821de1b61c292af3744c8d7da (opens in a new tab)
- git.kernel.org/stable/c/80c881e53a4fa0a80fa4bef7bc0ead0e8e88940d (opens in a new tab)
- git.kernel.org/stable/c/c84fcb79e5dbde0b8d5aeeaf04282d2149aebcf6 (opens in a new tab)
- git.kernel.org/stable/c/ef68afb1bee8d35a18896c27d7358079353d8d8a (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)
- ubuntu.com/security/notices/USN-8180-6 (opens in a new tab)
- ubuntu.com/security/notices/USN-8275-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8278-1 (opens in a new tab)