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Vulnerability · Published Jun 24, 2026 · Assigned by Linux

CVE-2026-52914batman-adv: fix fragment reassembly length accounting

Critical 9.8

In plain English

A critical-severity integer overflow in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 49.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix fragment reassembly length accounting batman-adv keeps a running payload length for queued fragments and uses it to validate a fragment chain before reassembly. That accounting currently allows the accumulated fragment length to be truncated during updates. As a result, malformed fragment chains can bypass the intended validation and drive reassembly with inconsistent length state, leading to a local denial of service. Fix the accounting by storing the accumulated length in a length-typed field and rejecting update overflows before the existing validation logic runs. The fix was verified against the original reproducer and against valid fragment reassembly paths.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.176-1DEBIAN-CVE-2026-52914
Debian:13linux6.12.94-1DEBIAN-CVE-2026-52914
Debian:14linux7.0.12-1DEBIAN-CVE-2026-52914
Ubuntu:22.04:LTSlinux5.15.0-186.196UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux6.8.0-137.137UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux6.8.0-137.137USN-8630-1
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-aws5.15.0-1112.119UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-aws6.8.0-1062.65USN-8630-1
Ubuntu:24.04:LTSlinux-aws6.8.0-1062.65UBUNTU-CVE-2026-52914
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1062.65~22.04.2UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1062.65~22.04.2USN-8630-4
Ubuntu:22.04:LTSlinux-azure5.15.0-1117.126UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure6.8.0-1064.72UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure6.8.0-1064.72USN-8630-1
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-azure7.0.0-1010.10UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1064.72~22.04.1USN-8630-1
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1064.72~22.04.1UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1117.126UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1063.70USN-8630-1
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1063.70UBUNTU-CVE-2026-52914
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1009.9UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1063.70~22.04.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1063.70~22.04.1USN-8630-1
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-gcp5.15.0-1112.122UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-gcp6.8.0-1065.73UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-gcp6.8.0-1065.73USN-8630-1
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1065.73~22.04.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1065.73~22.04.1USN-8630-1
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-gke5.15.0-1108.114UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-gke6.8.0-1060.68UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-gke6.8.0-1060.68USN-8630-1
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1095.103UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1047.51USN-8630-1
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1047.51UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-138.138~22.04.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-138.138~22.04.1USN-8656-1
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-28.28~24.04.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-ibm5.15.0-1106.110UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-ibm6.8.0-1062.63UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-ibm6.8.0-1062.63USN-8630-1
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1062.63~22.04.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1062.63~22.04.1USN-8630-1
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1107.113UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-kvm5.15.0-1104.109UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-184.194UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-137.137.1UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-137.137.1USN-8630-2
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-137.137.1~22.04.1USN-8630-2
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-137.137.1~22.04.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1107.108UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1060.63USN-8630-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1060.63UBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1032.32USN-8748-1
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1032.32UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1060.63~22.04.1USN-8630-1
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1060.63~22.04.1UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1060.63.1USN-8630-1
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1060.63.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1064.66UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1031.32UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1031.32USN-8630-2
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1053.53UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1033.33UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1033.33USN-8911-1
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-oracle5.15.0-1109.115UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-oracle6.8.0-1059.62USN-8630-2
Ubuntu:24.04:LTSlinux-oracle6.8.0-1059.62UBUNTU-CVE-2026-52914
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1059.62~22.04.1USN-8630-3
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1059.62~22.04.1UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-raspi5.15.0-1106.109UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-raspi6.8.0-1062.66UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-raspi6.8.0-1062.66USN-8630-5
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-52914
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-52914
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-52914
Ubuntu:26.04:LTSlinux-riscv7.0.0-28.28.1UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-137.137~22.04.1UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-vmware6.8.0-1008.8UBUNTU-CVE-2026-52914
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1034.35USN-8630-1
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1034.35UBUNTU-CVE-2026-52914
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1075.79UBUNTU-CVE-2026-52914

Affected products (as reported)

VendorProductVersions
Linux Linux 610bfc6bc99bc83680d190ebc69359a05fc7f605 – before e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64610bfc6bc99bc83680d190ebc69359a05fc7f605 – before 37be61825b15534a16ff9cfc9546de155b6df982610bfc6bc99bc83680d190ebc69359a05fc7f605 – before 975563c5de1123dde1ec7946bf5556d20c89d74e610bfc6bc99bc83680d190ebc69359a05fc7f605 – before f653b040dad1af70fa5cd4fe085e4758925480c9610bfc6bc99bc83680d190ebc69359a05fc7f605 – before e910dbf509125fe51ad68e4fa74dc8ab0a8e787a610bfc6bc99bc83680d190ebc69359a05fc7f605 – before 3eb8bcb823391bd58997831b3c9c152a4ba8e255610bfc6bc99bc83680d190ebc69359a05fc7f605 – before fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0610bfc6bc99bc83680d190ebc69359a05fc7f605 – before 9cd3f16c320bfdadd4509358122368deb56a5741
Linux Linux 3.13

Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References