{"id":"CVE-2026-72226","title":"batman-adv: tt: prevent TVLV OOB check overflow","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tt: prevent TVLV OOB check overflow\n\nA TT unicast TVLV contains the number of VLANs stored in it. This number is\nan u16 and gets multiplied by the size of t…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 0de12a4c4847f571d82a9cd96bc633eded41d7c6","Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < d6ff4764ff784ede25f5c83a6f5883a74c93a5ea","Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 1898273c5dc8148267ef9f97cd2517a2822350e7","Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 604bd5042fbcd1ab9f7cd98fd847ec017aeede8a","Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 7319c0794f91be2734aac695794e7203606b49f8","Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 3256c05d5a9db34346eaf20f52dddde984852d77","Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 6222b443686525cb5a9b6a9cecf23b2e2ab23e2a","Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 7a581d9aaba8c82bd6177fa36b2588eea77f6e2b","Linux 3.13"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-16T18:44:17.010963Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:45:02.826Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72226","references":[{"url":"https://git.kernel.org/stable/c/0de12a4c4847f571d82a9cd96bc633eded41d7c6"},{"url":"https://git.kernel.org/stable/c/d6ff4764ff784ede25f5c83a6f5883a74c93a5ea"},{"url":"https://git.kernel.org/stable/c/1898273c5dc8148267ef9f97cd2517a2822350e7"},{"url":"https://git.kernel.org/stable/c/604bd5042fbcd1ab9f7cd98fd847ec017aeede8a"},{"url":"https://git.kernel.org/stable/c/7319c0794f91be2734aac695794e7203606b49f8"},{"url":"https://git.kernel.org/stable/c/3256c05d5a9db34346eaf20f52dddde984852d77"},{"url":"https://git.kernel.org/stable/c/6222b443686525cb5a9b6a9cecf23b2e2ab23e2a"},{"url":"https://git.kernel.org/stable/c/7a581d9aaba8c82bd6177fa36b2588eea77f6e2b"}],"tags":["cve.org"],"epss":0.00755,"epssPercentile":0.54211,"ingestedAt":"2026-10-16T19:46:24.421Z","slug":"CVE-2026-72226","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tt: prevent TVLV OOB check overflow\n\nA TT unicast TVLV contains the number of VLANs stored in it. This number is\nan u16 and gets multiplied by the size of the struct\nbatadv_tvlv_tt_vlan_data (8 bytes). The size can therefore overflow the u16\nused to store the tt_vlan_len. All additional safety checks to prevent\nout-of-bounds access of the TVLV buffer are invalid due to this overflow.\n\nUsing size_t prevents this overflow and ensures that the safety checks\ncompare against the actual buffer requirements.\n\n## Affected\n\n- `Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 0de12a4c4847f571d82a9cd96bc633eded41d7c6`\n- `Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < d6ff4764ff784ede25f5c83a6f5883a74c93a5ea`\n- `Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 1898273c5dc8148267ef9f97cd2517a2822350e7`\n- `Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 604bd5042fbcd1ab9f7cd98fd847ec017aeede8a`\n- `Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 7319c0794f91be2734aac695794e7203606b49f8`\n- `Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 3256c05d5a9db34346eaf20f52dddde984852d77`\n- `Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 6222b443686525cb5a9b6a9cecf23b2e2ab23e2a`\n- `Linux >= 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b < 7a581d9aaba8c82bd6177fa36b2588eea77f6e2b`\n- `Linux 3.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}