{"schema_version":"1.9.0","id":"CVE-2026-63919","published":"2026-07-19T14:55:22.121Z","modified":"2026-08-31T18:26:05.591656672Z","related":["SUSE-SU-2026:23066-1","SUSE-SU-2026:23068-1","SUSE-SU-2026:23193-1","SUSE-SU-2026:23194-1","SUSE-SU-2026:23221-1","SUSE-SU-2026:23231-1","SUSE-SU-2026:23237-1","SUSE-SU-2026:23241-1","SUSE-SU-2026:23244-1","SUSE-SU-2026:3593-1","SUSE-SU-2026:3595-1","SUSE-SU-2026:3602-1","SUSE-SU-2026:3616-1","SUSE-SU-2026:3617-1","SUSE-SU-2026:3790-1","SUSE-SU-2026:3810-1","openSUSE-SU-2026:21555-1"],"summary":"xfrm: input: hold netns during deferred transport reinjection","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: input: hold netns during deferred transport reinjection\n\nTransport-mode reinjection stores a struct net pointer in skb->cb and\nuses it later from xfrm_trans_reinject(). That pointer must stay valid\nuntil the deferred callback runs.\n\nTake a netns reference when queueing deferred reinjection work and drop\nit after the callback completes. Use maybe_get_net() so the queueing\npath does not revive a namespace that is already being torn down.\n\nThis keeps the existing workqueue design and fixes the netns lifetime\nhandling in one place for all users of xfrm_trans_queue_net().","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7b3801927e52f8621de311277f7fc727635019e7"},{"fixed":"7ee59eda8820b758ed29e1cd3222359c7b97302c"},{"fixed":"2df7059a18afb7d3aee6c36cad5d371c198111d4"},{"fixed":"8dfabcba6a943a7a02ebe1e1637c361ba96acbaa"},{"fixed":"48ce101cd630d6745b6923b5bad8358bc4c119da"},{"fixed":"55ddfc41451f01c588089cd74957a05311b6f202"},{"fixed":"9f7ebb45a83afc3216e855e57d51bb4bc9b5232e"},{"fixed":"9f67a36e91bb50d358760f381f233913fe5c09f8"},{"fixed":"c16f74dc1d75d0e2e7670076d5375deda110ebeb"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63919.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.6.0"},{"fixed":"5.10.259"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.210"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.176"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.143"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.93"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.35"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63919.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2df7059a18afb7d3aee6c36cad5d371c198111d4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/48ce101cd630d6745b6923b5bad8358bc4c119da"},{"type":"WEB","url":"https://git.kernel.org/stable/c/55ddfc41451f01c588089cd74957a05311b6f202"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7ee59eda8820b758ed29e1cd3222359c7b97302c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8dfabcba6a943a7a02ebe1e1637c361ba96acbaa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9f67a36e91bb50d358760f381f233913fe5c09f8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9f7ebb45a83afc3216e855e57d51bb4bc9b5232e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c16f74dc1d75d0e2e7670076d5375deda110ebeb"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63919.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63919"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63919.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}