High severity7.8NVD Advisory· Published Apr 25, 2026· Updated May 6, 2026
CVE-2026-31683
CVE-2026-31683
Description
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: avoid OGM aggregation when skb tailroom is insufficient
When OGM aggregation state is toggled at runtime, an existing forwarded packet may have been allocated with only packet_len bytes, while a later packet can still be selected for aggregation. Appending in this case can hit skb_put overflow conditions.
Reject aggregation when the target skb tailroom cannot accommodate the new packet. The caller then falls back to creating a new forward packet instead of appending.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
45cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=2.6.38,<5.10.253
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- osv-coords39 versionspkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0
< 6.12.0-160000.35.1+ 38 more
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1.160000.2.16
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1.160000.2.16
- (no CPE)range: < 6.12.0-160000.35.1.160000.2.16
- (no CPE)range: < 6.12.0-160000.35.1.160000.2.16
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
- (no CPE)range: < 6.12.0-160000.35.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1nvdPatch
- git.kernel.org/stable/c/0d4aef630be9d5f9c1227d07669c26c4383b5ad0nvdPatch
- git.kernel.org/stable/c/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8nvdPatch
- git.kernel.org/stable/c/1ada20331f2df2a942d6b83ae1f04a304b642e2anvdPatch
- git.kernel.org/stable/c/67176c96f325837b0bb3e9538ca2eba414f447d8nvdPatch
- git.kernel.org/stable/c/6755347c5f9bdd44dee80f692208b056fcd40a52nvdPatch
- git.kernel.org/stable/c/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075nvdPatch
- git.kernel.org/stable/c/eda89a1bae0602aec8314ced299bb243b9f9aeefnvdPatch
News mentions
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