{"id":"CVE-2026-72234","summary":"batman-adv: access unicast_ttvn skb-\u003edata only after skb realloc","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: access unicast_ttvn skb-\u003edata only after skb realloc\n\nThe pskb_may_pull() called by batadv_get_vid() could reallocate the buffer\nbehind the skb. Variables which were pointing to the old buffer need to be\nreassigned to avoid an use-after-free.\n\nThis was done correctly for the ethernet header but missed for the\nunicast_packet pointer.","modified":"2026-08-18T03:56:39.223721930Z","published":"2026-08-15T05:54:24.395Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72234.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9a7b7248798123efbd5fafe58461d57c7cc718af"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aa9558af859934f24717d4bab97d61004f91a736"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72234.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72234"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c018ad3de61a1dc4194879a53e5559e094aa7b1a"},{"fixed":"aa9558af859934f24717d4bab97d61004f91a736"},{"fixed":"9c2c05629e46c1fd43931506d41c56a885a98eb4"},{"fixed":"7b162b36de750565404cd3b98315706622c6974f"},{"fixed":"ed90eb5c68420cdfe67ec1f773324198d2ef6f50"},{"fixed":"979175834a699ccc3c4c0b0ba60ecae0f135a587"},{"fixed":"b8afcf799b2cc92c41beebd029e53ed18960184a"},{"fixed":"9a7b7248798123efbd5fafe58461d57c7cc718af"},{"fixed":"7141990add3f75436f2933cb310654cad3b1e3e9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72234.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.13.0"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72234.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}