{"id":"CVE-2026-72234","title":"batman-adv: access unicast_ttvn skb->data only after skb realloc","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: access unicast_ttvn skb->data only after skb realloc\n\nThe pskb_may_pull() called by batadv_get_vid() could reallocate the buffer\nbehind the skb. Variables w…","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 >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < aa9558af859934f24717d4bab97d61004f91a736","Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < 9c2c05629e46c1fd43931506d41c56a885a98eb4","Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < 7b162b36de750565404cd3b98315706622c6974f","Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < ed90eb5c68420cdfe67ec1f773324198d2ef6f50","Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < 979175834a699ccc3c4c0b0ba60ecae0f135a587","Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < b8afcf799b2cc92c41beebd029e53ed18960184a","Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < 9a7b7248798123efbd5fafe58461d57c7cc718af","Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < 7141990add3f75436f2933cb310654cad3b1e3e9","Linux 3.13"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-16T18:44:38.054664Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:45:03.804Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72234","references":[{"url":"https://git.kernel.org/stable/c/aa9558af859934f24717d4bab97d61004f91a736"},{"url":"https://git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4"},{"url":"https://git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f"},{"url":"https://git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50"},{"url":"https://git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587"},{"url":"https://git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a"},{"url":"https://git.kernel.org/stable/c/9a7b7248798123efbd5fafe58461d57c7cc718af"},{"url":"https://git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9"}],"tags":["cve.org"],"epss":0.00734,"epssPercentile":0.53476,"ingestedAt":"2026-10-16T19:46:24.419Z","slug":"CVE-2026-72234","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: access unicast_ttvn skb->data 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.\n\n## Affected\n\n- `Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < aa9558af859934f24717d4bab97d61004f91a736`\n- `Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < 9c2c05629e46c1fd43931506d41c56a885a98eb4`\n- `Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < 7b162b36de750565404cd3b98315706622c6974f`\n- `Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < ed90eb5c68420cdfe67ec1f773324198d2ef6f50`\n- `Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < 979175834a699ccc3c4c0b0ba60ecae0f135a587`\n- `Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < b8afcf799b2cc92c41beebd029e53ed18960184a`\n- `Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < 9a7b7248798123efbd5fafe58461d57c7cc718af`\n- `Linux >= c018ad3de61a1dc4194879a53e5559e094aa7b1a < 7141990add3f75436f2933cb310654cad3b1e3e9`\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":0.1,"exploitation":0,"ransomware":0},"changes":[]}