{"id":"CVE-2026-43107","summary":"xfrm: account XFRMA_IF_ID in aevent size calculation","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: account XFRMA_IF_ID in aevent size calculation\n\nxfrm_get_ae() allocates the reply skb with xfrm_aevent_msgsize(), then\nbuild_aevent() appends attributes including XFRMA_IF_ID when x-\u003eif_id is\nset.\n\nxfrm_aevent_msgsize() does not include space for XFRMA_IF_ID. For states\nwith if_id, build_aevent() can fail with -EMSGSIZE and hit BUG_ON(err \u003c 0)\nin xfrm_get_ae(), turning a malformed netlink interaction into a kernel\npanic.\n\nAccount XFRMA_IF_ID in the size calculation unconditionally and replace\nthe BUG_ON with normal error unwinding.","modified":"2026-05-28T03:54:37.674744774Z","published":"2026-05-06T07:40:35.068Z","related":["CGA-v9pj-2c78-79r8"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43107.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2c41283d94af943a05f7f2cc1a01f0c872f3cf43"},{"type":"WEB","url":"https://git.kernel.org/stable/c/58e5735d1a5373652f405a0c16e54ac04aaab0ad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7081d46d32312f1a31f0e0e99c6835a394037599"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e62e322ea20be78e346e4b49f9a6b9f03313af4c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43107.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43107"},{"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":"7e6526404adedf079279aa7aa11722deaca8fe2e"},{"fixed":"2c41283d94af943a05f7f2cc1a01f0c872f3cf43"},{"fixed":"e62e322ea20be78e346e4b49f9a6b9f03313af4c"},{"fixed":"58e5735d1a5373652f405a0c16e54ac04aaab0ad"},{"fixed":"7081d46d32312f1a31f0e0e99c6835a394037599"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43107.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.19.0"},{"fixed":"6.12.83"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.24"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.14"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43107.json"}}],"schema_version":"1.7.5"}