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Vulnerability · Published Jun 24, 2026 · Assigned by Linux

CVE-2026-52934batman-adv: tvlv: reject oversized TVLV packets

High 8.8

In plain English

A high-severity security flaw 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 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.2%top 84.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: tvlv: reject oversized TVLV packets batadv_tvlv_container_ogm_append() builds a TVLV packet section from the tvlv.container_list. The total size of this section is computed by batadv_tvlv_container_list_size(), which sums the sizes of all registered containers. The return type and accumulator in batadv_tvlv_container_list_size() were u16. If the accumulated size exceeds U16_MAX, the value wraps around, causing the subsequent allocation in batadv_tvlv_container_ogm_append() to be undersized. The memcpy-style copy that follows would then write beyond the end of the allocated buffer, corrupting kernel memory. Fix this by widening the return type of batadv_tvlv_container_list_size() to size_t. In batadv_tvlv_container_ogm_append(), check the computed length against U16_MAX before proceeding, and bail out as if the allocation had failed when the limit is exceeded.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.176-1DEBIAN-CVE-2026-52934
Debian:13linux6.12.94-1DEBIAN-CVE-2026-52934
Debian:14linux7.0.12-1DEBIAN-CVE-2026-52934
Ubuntu:22.04:LTSlinux5.15.0-198.208UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux6.8.0-146.146USN-8903-1
Ubuntu:24.04:LTSlinux6.8.0-146.146UBUNTU-CVE-2026-52934
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-aws5.15.0-1117.124UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-aws6.8.0-1066.69USN-8903-1
Ubuntu:24.04:LTSlinux-aws6.8.0-1066.69UBUNTU-CVE-2026-52934
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1066.69~22.04.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1066.69~22.04.1USN-8903-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1123.132UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure6.8.0-1070.78UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure6.8.0-1070.78USN-8904-1
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-azure7.0.0-1010.10UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1070.78~22.04.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1070.78~22.04.1USN-8904-1
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1122.131UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1068.75USN-8904-1
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1068.75UBUNTU-CVE-2026-52934
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1009.9UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1068.75~22.04.1USN-8904-1
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1068.75~22.04.1UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-gcp5.15.0-1118.128UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-gcp6.8.0-1070.78USN-8905-2
Ubuntu:24.04:LTSlinux-gcp6.8.0-1070.78UBUNTU-CVE-2026-52934
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1070.78~22.04.1USN-8905-1
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1070.78~22.04.1UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-gke5.15.0-1113.119UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-gke6.8.0-1065.73UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-gke6.8.0-1065.73USN-8903-2
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1100.108UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1051.55UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1051.55USN-8903-2
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-28.28~24.04.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-ibm5.15.0-1111.115UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-ibm6.8.0-1066.67USN-8903-2
Ubuntu:24.04:LTSlinux-ibm6.8.0-1066.67UBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1066.67~22.04.1USN-8906-1
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1066.67~22.04.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1112.118UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-kvm5.15.0-1109.114UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-195.205UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-146.146.1USN-8903-2
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-146.146.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-146.146.1~22.04.1USN-8903-2
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-146.146.1~22.04.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1112.113UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1064.67USN-8903-2
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1064.67UBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1064.67~22.04.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1064.67~22.04.1USN-8903-2
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1064.67.1USN-8903-2
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1064.67.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-oracle5.15.0-1114.120UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-oracle6.8.0-1063.66USN-8903-2
Ubuntu:24.04:LTSlinux-oracle6.8.0-1063.66UBUNTU-CVE-2026-52934
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-52934
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-52934
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-52934
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-52934
Ubuntu:26.04:LTSlinux-riscv7.0.0-28.28.1UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-146.146~22.04.1UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3UBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-vmware6.8.0-1008.8UBUNTU-CVE-2026-52934
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-52934
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1080.84UBUNTU-CVE-2026-52934

Affected products (as reported)

VendorProductVersions
Linux Linux ef26157747d42254453f6b3ac2bd8bd3c53339c3 – before c02aa6c0c9d1bea9bb75dea362b75ad225137baeef26157747d42254453f6b3ac2bd8bd3c53339c3 – before 1595628a2f877d052eda18865ccf539392c47c04ef26157747d42254453f6b3ac2bd8bd3c53339c3 – before 6448a49344e87487b61bd88cb850cd694a0f576def26157747d42254453f6b3ac2bd8bd3c53339c3 – before 13493b00dd1e05a705981e052158652ea23eb482ef26157747d42254453f6b3ac2bd8bd3c53339c3 – before 94db72e9dac202e017ee3db22c59d17e4f3bf171ef26157747d42254453f6b3ac2bd8bd3c53339c3 – before ede47988ac5687793745b17c1634a496a2299919ef26157747d42254453f6b3ac2bd8bd3c53339c3 – before 94a3d72cd9b21116d7c6d5bdc57c11401fc28557ef26157747d42254453f6b3ac2bd8bd3c53339c3 – before f50487e3566358b2b982b7801945e858c78ad9ab
Linux Linux 3.13

References