{"id":"CVE-2025-21638","summary":"sctp: sysctl: auth_enable: avoid using current-\u003ensproxy","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: sysctl: auth_enable: avoid using current-\u003ensproxy\n\nAs mentioned in a previous commit of this series, using the 'net'\nstructure via 'current' is not recommended for different reasons:\n\n- Inconsistency: getting info from the reader's/writer's netns vs only\n  from the opener's netns.\n\n- current-\u003ensproxy can be NULL in some cases, resulting in an 'Oops'\n  (null-ptr-deref), e.g. when the current task is exiting, as spotted by\n  syzbot [1] using acct(2).\n\nThe 'net' structure can be obtained from the table-\u003edata using\ncontainer_of().\n\nNote that table-\u003edata could also be used directly, but that would\nincrease the size of this fix, while 'sctp.ctl_sock' still needs to be\nretrieved from 'net' structure.","modified":"2026-05-18T05:58:03.994662919Z","published":"2025-01-19T10:17:56.084Z","related":["SUSE-SU-2025:0784-1","SUSE-SU-2025:0834-1","SUSE-SU-2025:0847-1","SUSE-SU-2025:0856-1","SUSE-SU-2025:0955-1","SUSE-SU-2025:20190-1","SUSE-SU-2025:20192-1","SUSE-SU-2025:20260-1","SUSE-SU-2025:20270-1","USN-7379-2","USN-7380-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21638.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html"},{"type":"WEB","url":"https://git.kernel.org/stable/c/15649fd5415eda664ef35780c2013adeb5d9c695"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1b67030d39f2b00f94ac1f0af11ba6657589e4d3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd2a2939423566c654545fa3e96a656662a0af9e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c184bc621e3cef03ac9ba81a50dda2dae6a21d36"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cf387cdebfaebae228dfba162f94c567a67610c3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc583e7e5f8515ca489c0df28e4362a70eade382"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21638.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21638"},{"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":"b14878ccb7fac0242db82720b784ab62c467c0dc"},{"fixed":"cf387cdebfaebae228dfba162f94c567a67610c3"},{"fixed":"dc583e7e5f8515ca489c0df28e4362a70eade382"},{"fixed":"bd2a2939423566c654545fa3e96a656662a0af9e"},{"fixed":"1b67030d39f2b00f94ac1f0af11ba6657589e4d3"},{"fixed":"7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6"},{"fixed":"c184bc621e3cef03ac9ba81a50dda2dae6a21d36"},{"fixed":"15649fd5415eda664ef35780c2013adeb5d9c695"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"e5eae4a0511241959498b180fa0df0d4f1b11b9c"},{"last_affected":"88830f227a1f96e44d82ddfcb0cc81d517ec6dd8"},{"last_affected":"3938b0336a93fa5faa242dc9e5823ac69df9e066"}]}],"versions":["v3.13","v3.14.4","v3.10.40","v3.14","v3.12.20","v3.10.39","v3.14.3","v3.14.2","v3.10.38","v3.12.19","v3.14-rc4","v3.14.1","v3.10.37","v3.12.18","v3.14-rc8","v3.10.36","v3.12.17","v3.14-rc7","v3.14-rc6","v3.14-rc1","v3.14-rc2","v3.10.35","v3.12.16","v3.10.34","v3.14-rc5","v3.12.15","v3.10.33","v3.14-rc3","v3.12.14","v3.10.32","v3.12.13","v3.12.12","v3.10.31","v3.12.11","v3.10.30","v3.12.10","v3.10.29","v3.13-rc6","v3.12.9","v3.10.28","v3.12.8","v3.10.27","v3.13-rc8","v3.12","v3.13-rc7","v3.13-rc1","v3.12.7","v3.10.26","v3.13-rc4","v3.13-rc3","v3.12.6","v3.10.25","v3.13-rc5","v3.13-rc2","v3.12.5","v3.10.24","v3.12.4","v3.10.23","v3.10.22","v3.12.3","v3.12.2","v3.10.21","v3.12.1","v3.10.20","v3.10.19","v3.12-rc7","v3.12-rc3","v3.12-rc6","v3.10.18","v3.12-rc1","v3.12-rc5","v3.11","v3.10.17","v3.12-rc2","v3.12-rc4","v3.10.16","v3.10.15","v3.10.14","v3.10.13","v3.10.12","v3.10.11","v3.11-rc7","v3.10.10","v3.11-rc2","v3.11-rc5","v3.11-rc1","v3.11-rc3","v3.11-rc4","v3.10.9","v3.11-rc6","v3.10.8","v3.10.7","v3.10.6","v3.10.5","v3.10-rc2","v3.10.4","v3.10.3","v3.10.2","v3.10","v3.10.1","v3.10-rc7","v3.10-rc6","v3.10-rc1","v3.10-rc5","v3.10-rc3","v3.10-rc4","v3.9","v3.9-rc2","v3.9-rc7","v3.9-rc8","v3.9-rc3","v3.9-rc6","v3.9-rc5","v3.9-rc4","v3.9-rc1","v3.8","v3.8-rc7","v3.8-rc6","v3.8-rc5","v3.8-rc2","v3.8-rc1","v3.8-rc3","v3.8-rc4","v3.7","v3.7-rc1","v3.6","v3.7-rc6","v3.7-rc7","v3.7-rc3","v3.7-rc8","v3.7-rc2","v3.7-rc4","v3.7-rc5","v3.6-rc7","v3.6-rc1","v3.5-rc3","v3.6-rc6","v3.6-rc5","v3.5","v3.6-rc3","v3.6-rc4","v3.6-rc2","v3.4-rc4","v3.5-rc7","v3.5-rc5","v3.5-rc6","v3.5-rc2","v3.5-rc1","v3.5-rc4","v3.4","v3.4-rc2","v3.4-rc1","v3.4-rc7","v3.4-rc6","v3.4-rc3","v3.4-rc5","v3.3","v3.3-rc6","v3.3-rc3","v3.3-rc7","v3.3-rc2","v3.3-rc5","v3.2","v3.3-rc4","v3.3-rc1","v3.2-rc4","v3.2-rc7","v3.2-rc6","v3.2-rc5","v3.2-rc3","v3.1","v3.2-rc2","v3.2-rc1","v3.1-rc1","v3.1-rc9","v3.1-rc8","v3.1-rc10","v3.1-rc7","v3.1-rc3","v3.1-rc2","v3.1-rc4","v3.1-rc5","v3.0","v3.1-rc6","v3.0-rc7","v3.0-rc4","v3.0-rc6","v3.0-rc5","v3.0-rc3","v3.0-rc1","v2.6.39","v3.0-rc2","v2.6.38","v2.6.39-rc2","v2.6.39-rc7","v2.6.39-rc5","v2.6.39-rc1","v2.6.38-rc7","v2.6.39-rc6","v2.6.39-rc4","v2.6.39-rc3","v2.6.37","v2.6.38-rc1","v2.6.38-rc8","v2.6.38-rc2","v2.6.38-rc6","v2.6.38-rc5","v2.6.38-rc4","v2.6.38-rc3","v2.6.37-rc4","v2.6.37-rc2","v2.6.36","v2.6.37-rc5","v2.6.37-rc8","v2.6.37-rc7","v2.6.37-rc6","v2.6.37-rc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