{"id":"CVE-2026-72463","summary":"xfrm: Fix dev use-after-free in xfrm async resumption","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: Fix dev use-after-free in xfrm async resumption\n\nxfrm async resumption hold skb-\u003edev refcnt until after transport_finish.\nHowever, xfrm_rcv_cb may modify skb-\u003edev to tunnel dev without taking\ndevice reference, such as vti_rcv_cb. The subsequent async resumption\nwill decrement the tunnel device's reference count, which lead to uaf\nof tunnel dev and refcnt leak of orig dev as below:\n\nunregister_netdevice: waiting for vti1 to become free. Usage count = -2\n\nStash the original skb-\u003edev to fix refcnt imbalance. The new skb-\u003edev set\nby xfrm_rcv_cb can race with device teardown. Extend rcu protection over\nxfrm_rcv_cb and transport_finish to prevent races.","modified":"2026-08-18T03:56:25.620474769Z","published":"2026-08-15T05:57:07.413Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72463.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/63a30015199912bd5055bead8001b1ae68a67cdb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8045c0df98d4f14c54e5cb875f1c9c0ce89fe4ff"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72463.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72463"},{"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":"1c428b03840094410c5fb6a5db30640486bbbfcb"},{"fixed":"63a30015199912bd5055bead8001b1ae68a67cdb"},{"fixed":"8045c0df98d4f14c54e5cb875f1c9c0ce89fe4ff"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"4236c30b437b80f673b9e08c8fae38b8d471ac9e"},{"last_affected":"0f451b43c88bf2b9c038b414be580efee42e031b"},{"last_affected":"5002beda5cac69d522dc54da0d5d463ed9c963d2"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.12.94"},{"fixed":"6.13"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.18.23"},{"fixed":"6.19"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.19.13"},{"fixed":"6.20"}]}],"versions":["v6.12.93","v6.12.92","v6.12.91","v6.12.90","v6.12.89","v6.12.88","v6.12.87","v6.12.86","v6.12.85","v6.12.84","v6.12.83","v6.12.82","v6.19.12","v6.18.22","v6.12.81","v6.19.11","v6.18.21","v6.12.80","v6.19-rc2","v6.19.10","v6.18.20","v6.12.79","v6.19","v6.12.78","v6.19.9","v6.18.19","v6.12.77","v6.19.8","v6.18.18","v6.19.7","v6.18.17","v6.12.76","v6.18.16","v6.19.6","v6.12.75","v6.18.15","v6.19.5","v6.12.74","v6.19.4","v6.18.14","v6.19.3","v6.18.13","v6.19.2","v6.18.12","v6.12.73","v6.19.1","v6.18.11","v6.12.72","v6.18.10","v6.12.71","v6.12.70","v6.18.9","v6.12.69","v6.19-rc8","v6.19-rc1","v6.19-rc6","v6.18.8","v6.12.68","v6.19-rc7","v6.19-rc5","v6.19-rc4","v6.18.7","v6.12.67","v6.19-rc3","v6.18.6","v6.12.66","v6.18.5","v6.12.65","v6.18.4","v6.12.64","v6.18.3","v6.12.63","v6.18.2","v6.18.1","v6.12.62","v6.18","v6.12.61","v6.18-rc1","v6.12.60","v6.18-rc7","v6.18-rc3","v6.12.59","v6.18-rc5","v6.18-rc6","v6.18-rc2","v6.12.58","v6.18-rc4","v6.12.57","v6.12.56","v6.12.55","v6.12.54","v6.12.53","v6.12.52","v6.12.51","v6.17","v6.17-rc7","v6.12.50","v6.17-rc1","v6.17-rc2","v6.12.49","v6.17-rc6","v6.17-rc4","v6.17-rc5","v6.17-rc3","v6.16","v6.12.48","v6.12.47","v6.12.46","v6.12.45","v6.12.44","v6.12.43","v6.12.42","v6.12.41","v6.16-rc6","v6.12.40","v6.16-rc1","v6.16-rc4","v6.16-rc2","v6.16-rc5","v6.16-rc7","v6.16-rc3","v6.12.39","v6.14-rc3","v6.12.38","v6.12.37","v6.12.36","v6.12.35","v6.12.34","v6.12.33","v6.15","v6.12.32","v6.15-rc1","v6.15-rc6","v6.15-rc3","v6.12.31","v6.12.30","v6.15-rc2","v6.15-rc7","v6.15-rc4","v6.12.29","v6.12.28","v6.15-rc5","v6.12.27","v6.12.26","v6.14","v6.12.25","v6.12.24","v6.12.23","v6.12.22","v6.12.21","v6.14-rc1","v6.14-rc7","v6.14-rc6","v6.12.20","v6.14-rc4","v6.14-rc5","v6.12.19","v6.14-rc2","v6.12.18","v6.12.17","v6.12.16","v6.12.15","v6.13","v6.12.14","v6.13-rc1","v6.12.13","v6.12.12","v6.12.11","v6.13-rc6","v6.12.10","v6.13-rc7","v6.13-rc2","v6.12.9","v6.13-rc5","v6.13-rc3","v6.12.8","v6.12-rc1","v6.13-rc4","v6.12.7","v6.12.6","v6.12.5","v6.12.4","v6.12","v6.12.3","v6.12.2","v6.12.1","v6.12-rc7","v6.12-rc3","v6.12-rc4","v6.12-rc6","v6.12-rc5","v6.12-rc2","v6.11-rc1","v6.11-rc5","v6.11","v6.11-rc7","v6.10-rc1","v6.11-rc6","v6.11-rc3","v6.11-rc4","v6.11-rc2","v6.10","v6.10-rc6","v6.10-rc7","v6.10-rc3","v6.9-rc1","v6.10-rc5","v6.10-rc2","v6.10-rc4","v6.9","v6.9-rc6","v6.9-rc7","v6.9-rc5","v6.9-rc3","v6.9-rc2","v6.8","v6.9-rc4","v6.8-rc1","v6.7-rc1","v6.8-rc7","v6.8-rc6","v6.8-rc5","v6.8-rc4","v6.8-rc3","v6.8-rc2","v6.7","v6.7-rc3","v6.7-rc8","v6.7-rc7","v6.7-rc6","v6.7-rc2","v6.7-rc4","v6.7-rc5","v6.6","v6.6-rc1","v6.6-rc5","v6.6-rc3","v6.6-rc7","v6.6-rc6","v6.6-rc4","v6.6-rc2","v6.5","v6.5-rc1","v6.5-rc2","v6.5-rc7","v6.5-rc4","v6.5-rc3","v6.5-rc6","v6.5-rc5","v6.4","v6.4-rc7","v6.4-rc1","v6.4-rc6","v6.4-rc5","v6.4-rc3","v6.4-rc4","v6.4-rc2","v6.3","v6.3-rc1","v6.3-rc7","v6.3-rc2","v6.3-rc3","v6.3-rc5","v6.3-rc6","v6.3-rc4","v6.2-rc6","v6.2-rc1","v6.2","v6.2-rc2","v6.2-rc8","v6.2-rc5","v6.2-rc4","v6.2-rc7","v6.2-rc3","v6.1-rc1","v6.1","v6.1-rc8","v6.1-rc3","v6.1-rc6","v6.1-rc7","v6.1-rc4","v6.1-rc2","v6.1-rc5","v6.0-rc1","v6.0","v6.0-rc7","v6.0-rc3","v6.0-rc2","v6.0-rc6","v6.0-rc4","v6.0-rc5","v5.19","v5.19-rc1","v5.19-rc5","v5.19-rc8","v5.19-rc6","v5.18"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