{"id":"CVE-2026-31663","summary":"xfrm: hold dev ref until after transport_finish NF_HOOK","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: hold dev ref until after transport_finish NF_HOOK\n\nAfter async crypto completes, xfrm_input_resume() calls dev_put()\nimmediately on re-entry before the skb reaches transport_finish.\nThe skb-\u003edev pointer is then used inside NF_HOOK and its okfn,\nwhich can race with device teardown.\n\nRemove the dev_put from the async resumption entry and instead\ndrop the reference after the NF_HOOK call in transport_finish,\nusing a saved device pointer since NF_HOOK may consume the skb.\nThis covers NF_DROP, NF_QUEUE and NF_STOLEN paths that skip\nthe okfn.\n\nFor non-transport exits (decaps, gro, drop) and secondary\nasync return points, release the reference inline when\nasync is set.","modified":"2026-05-18T05:59:53.016752964Z","published":"2026-04-24T14:45:13.239Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31663.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0f451b43c88bf2b9c038b414be580efee42e031b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1c428b03840094410c5fb6a5db30640486bbbfcb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5002beda5cac69d522dc54da0d5d463ed9c963d2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31663.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31663"},{"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":"acf568ee859f098279eadf551612f103afdacb4e"},{"fixed":"0f451b43c88bf2b9c038b414be580efee42e031b"},{"fixed":"5002beda5cac69d522dc54da0d5d463ed9c963d2"},{"fixed":"1c428b03840094410c5fb6a5db30640486bbbfcb"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"69895c5ea0ca2e8d7de1e6d36965d0ab9730787f"},{"last_affected":"833760100588acfb267dac4d6a02ab9931237739"},{"last_affected":"e095ecaec6d94aa2156cceb98a85d409b51190f3"}]}],"versions":["v4.14","v3.16.54","v3.2.99","v4.14.23","v4.14.22","v4.14.21","v4.14.20","v4.14.19","v3.16.53","v3.2.98","v4.14.18","v4.14.17","v4.14.16","v4.14.15","v4.14.14","v4.14.13","v4.14.12","v3.16.52","v3.2.97","v4.14.11","v4.14.10","v3.16.51","v3.2.96","v4.14.9","v4.14.8","v4.14.7","v4.14.6","v4.14.5","v4.14.4","v4.14.3","v4.14.2","v4.14-rc1","v3.2.95","v3.16.50","v4.14.1","v4.14-rc7","v4.14-rc3","v4.13","v3.2.94","v3.16.49","v4.14-rc8","v4.14-rc4","v4.14-rc6","v4.14-rc2","v4.14-rc5","v3.16.48","v3.2.93","v4.13-rc2","v3.2.92","v3.16.47","v4.13-rc1","v4.13-rc3","v4.13-rc7","v4.13-rc4","v4.13-rc5","v4.13-rc6","v3.16.46","v3.2.91","v4.12-rc1","v4.12","v3.16.45","v3.2.90","v4.12-rc5","v4.12-rc7","v3.16.44","v3.2.89","v4.12-rc6","v4.12-rc4","v4.12-rc2","v4.12-rc3","v4.11","v3.16.43","v3.2.88","v4.11-rc1","v4.11-rc6","v4.11-rc8","v4.11-rc7","v4.11-rc3","v4.11-rc5","v4.11-rc2","v4.11-rc4","v3.16.42","v3.2.87","v4.10","v3.16.41","v3.2.86","v4.9","v3.16.40","v3.2.85","v3.16.39","v3.2.84","v4.10-rc8","v4.10-rc3","v4.10-rc1","v4.10-rc7","v4.10-rc6","v4.10-rc2","v4.10-rc5","v4.10-rc4","v4.9-rc7","v4.9-rc6","v4.9-rc8","v4.9-rc1","v4.9-rc5","v4.9-rc3","v4.9-rc4","v4.9-rc2","v3.16.38","v3.2.83","v4.8","v3.16.37","v3.2.82","v4.8-rc8","v4.8-rc2","v4.8-rc1","v4.8-rc7","v4.8-rc6","v4.8-rc5","v4.8-rc4","v4.8-rc3","v4.7","v3.16.36","v3.2.81","v4.7-rc4","v4.7-rc2","v4.7-rc1","v4.7-rc7","v4.7-rc6","v4.7-rc3","v4.7-rc5","v4.6","v4.6-rc1","v3.16.35","v3.2.80","v4.6-rc6","v4.6-rc4","v4.6-rc7","v4.6-rc5","v4.5-rc4","v4.6-rc2","v4.6-rc3","v3.2.79","v4.5","v3.2.78","v4.4","v4.5-rc1","v4.5-rc6","v4.5-rc2","v4.5-rc7","v4.5-rc5","v4.5-rc3","v3.2.77","v3.2.76","v3.2.75","v4.4-rc1","v4.4-rc2","v4.4-rc8","v4.4-rc3","v4.4-rc7","v4.4-rc5","v4.4-rc6","v4.4-rc4","v3.2.74","v4.3","v3.2.73","v3.2.72","v4.3-rc1","v4.3-rc6","v4.3-rc4","v4.3-rc2","v4.3-rc7","v4.3-rc5","v4.3-rc3","v4.2","v3.2.71","v4.2-rc2","v4.2-rc1","v4.2-rc8","v4.2-rc4","v4.2-rc6","v4.2-rc7","v4.0-rc5","v3.2.70","v4.2-rc5","v3.2.69","v4.2-rc3","v4.1-rc2","v4.1","v4.1-rc1","v4.1-rc8","v4.1-rc7","v4.1-rc6","v4.1-rc3","v4.1-rc4","v4.0","v4.1-rc5","v3.2.68","v4.0-rc1","v4.0-rc2","v4.0-rc7","v4.0-rc3","v4.0-rc6","v4.0-rc4","v3.19","v3.2.67","v3.2.66","v3.19-rc7","v3.19-rc5","v3.19-rc1","v3.19-rc6","v3.19-rc4","v3.18-rc1","v3.19-rc3","v3.19-rc2","v3.18","v3.2.65","v3.2.64","v3.18-rc7","v3.18-rc6","v3.18-rc2","v3.18-rc3","v3.18-rc4","v3.18-rc5","v3.17","v3.2.63","v3.16.7","v3.16.6","v3.17-rc1","v3.16.5","v3.17-rc7","v3.16.4","v3.17-rc2","v3.16.3","v3.17-rc4","v3.16","v3.17-rc5","v3.17-rc6","v3.16.2","v3.17-rc3","v3.2.62","v3.16.1","v3.16-rc7","v3.2.61","v3.16-rc1","v3.16-rc3","v3.16-rc5","v3.16-rc6","v3.16-rc2","v3.16-rc4","v3.13","v3.2.60","v3.15","v3.15-rc5","v3.2.59","v3.15-rc8","v3.15-rc1","v3.15-rc6","v3.15-rc3","v3.15-rc7","v3.15-rc2","v3.15-rc4","v3.2.58","v3.14","v3.14-rc4","v3.2.57","v3.14-rc8","v3.14-rc7","v3.2.56","v3.14-rc6","v3.14-rc1","v3.14-rc2","v3.2.55","v3.14-rc5","v3.14-rc3","v3.2.54","v3.13-rc6","v3.13-rc8","v3.12","v3.13-rc7","v3.13-rc1","v3.13-rc4","v3.13-rc3","v3.13-rc5","v3.2.53","v3.13-rc2","v3.2.52","v3.12-rc7","v3.12-rc3","v3.12-rc6","v3.12-rc1","v3.12-rc5","v3.11","v3.12-rc2","v3.12-rc4","v3.2.51","v3.2.50","v3.11-rc7","v3.11-rc2","v3.11-rc5","v3.11-rc1","v3.11-rc3","v3.11-rc4","v3.11-rc6","v3.10-rc2","v3.2.49","v3.2.48","v3.10","v3.10-rc7","v3.2.47","v3.10-rc6","v3.10-rc1","v3.10-rc5","v3.10-rc3","v3.2.46","v3.10-rc4","v3.2.45","v3.9","v3.2.44","v3.9-rc2","v3.9-rc7","v3.9-rc8","v3.2.43","v3.9-rc3","v3.9-rc6","v3.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