{"id":"CVE-2026-46333","summary":"ptrace: slightly saner 'get_dumpable()' logic","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nptrace: slightly saner 'get_dumpable()' logic\n\nThe 'dumpability' of a task is fundamentally about the memory image of\nthe task - the concept comes from whether it can core dump or not - and\nmakes no sense when you don't have an associated mm.\n\nAnd almost all users do in fact use it only for the case where the task\nhas a mm pointer.\n\nBut we have one odd special case: ptrace_may_access() uses 'dumpable' to\ncheck various other things entirely independently of the MM (typically\nexplicitly using flags like PTRACE_MODE_READ_FSCREDS).  Including for\nthreads that no longer have a VM (and maybe never did, like most kernel\nthreads).\n\nIt's not what this flag was designed for, but it is what it is.\n\nThe ptrace code does check that the uid/gid matches, so you do have to\nbe uid-0 to see kernel thread details, but this means that the\ntraditional \"drop capabilities\" model doesn't make any difference for\nthis all.\n\nMake it all make a *bit* more sense by saying that if you don't have a\nMM pointer, we'll use a cached \"last dumpability\" flag if the thread\never had a MM (it will be zero for kernel threads since it is never\nset), and require a proper CAP_SYS_PTRACE capability to override.","modified":"2026-05-23T18:30:02.413678816Z","published":"2026-05-15T12:58:44.599Z","related":["ALSA-2026:19664","ALSA-2026:19666","ALSA-2026:A008","ALSA-2026:A009","ALSA-2026:A010","SUSE-SU-2026:1899-1","SUSE-SU-2026:1900-1","SUSE-SU-2026:1904-1","SUSE-SU-2026:1907-1","SUSE-SU-2026:1908-1","SUSE-SU-2026:1909-1","SUSE-SU-2026:1959-1","SUSE-SU-2026:1978-1","SUSE-SU-2026:21721-1","SUSE-SU-2026:21724-1","SUSE-SU-2026:21734-1","SUSE-SU-2026:21735-1","openSUSE-SU-2026:10825-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46333.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/05/15/9"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/05/20/14"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/05/20/16"},{"type":"WEB","url":"https://git.kernel.org/stable/c/01363cb3fbd0238ffdeb09f53e9039c9edf8a730"},{"type":"WEB","url":"https://git.kernel.org/stable/c/15b828a46f305ae9f05a7c16914b3ce273474205"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2a93a4fac7b6051d3be7cd1b015fe7320cd0404d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4709234fd1b95136ceb789f639b1e7ea5de1b181"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8f907d345bae8f4b3f004c5abc56bf2dfb851ea7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2026/05/msg00032.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2026/05/msg00035.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46333.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46333"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"EVIDENCE","url":"https://github.com/0xdeadbeefnetwork/ssh-keysign-pwn/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bfedb589252c01fa505ac9f6f2a3d5d68d707ef4"},{"fixed":"93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6"},{"fixed":"15b828a46f305ae9f05a7c16914b3ce273474205"},{"fixed":"4709234fd1b95136ceb789f639b1e7ea5de1b181"},{"fixed":"8f907d345bae8f4b3f004c5abc56bf2dfb851ea7"},{"fixed":"6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d"},{"fixed":"2a93a4fac7b6051d3be7cd1b015fe7320cd0404d"},{"fixed":"01363cb3fbd0238ffdeb09f53e9039c9edf8a730"},{"fixed":"31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"d5b3e840dbf6dd2c0f30b5982b6f5ecd49e46b12"},{"last_affected":"03eed7afbc09e061f66b448daf7863174c3dc3f3"},{"last_affected":"e45692fa1aea06676449b63ef3c2b6e1e72b7578"},{"last_affected":"694a95fa6dae4991f16cda333d897ea063021fed"}]}],"versions":["v3.16.51","v3.16.50","v3.16.49","v3.16.48","v3.16.47","v3.16.46","v3.16.45","v3.16.44","v3.16.43","v3.16.42","v3.16.41","v4.9","v3.16.40","v3.16.39","v4.8.15","v4.4.39","v4.9-rc7","v4.9-rc6","v4.9-rc8","v4.8.14","v4.4.38","v4.9-rc1","v4.8.13","v4.4.37","v4.9-rc5","v4.8.12","v4.4.36","v4.9-rc3","v4.8.11","v4.4.35","v4.9-rc4","v4.8.10","v4.4.34","v4.9-rc2","v4.8.9","v4.4.33","v3.16.38","v4.8.8","v4.4.32","v4.8.7","v4.4.31","v4.8.6","v4.4.30","v4.8","v4.4.29","v4.8.5","v4.4.28","v4.8.4","v4.4.27","v4.8.3","v4.4.26","v3.16.37","v4.8.2","v4.4.25","v4.8.1","v4.4.24","v4.4.23","v4.8-rc8","v4.8-rc2","v4.8-rc1","v4.8-rc7","v4.4.22","v4.8-rc6","v4.8-rc5","v4.4.21","v4.8-rc4","v4.4.20","v4.8-rc3","v4.7","v4.4.19","v3.16.36","v4.4.18","v4.4.17","v4.4.16","v4.7-rc4","v4.7-rc2","v4.4.15","v4.7-rc1","v4.7-rc7","v4.7-rc6","v4.7-rc3","v4.4.14","v4.7-rc5","v4.4.13","v4.6","v4.6-rc1","v3.16.35","v4.4.12","v4.4.11","v4.6-rc6","v4.6-rc4","v4.6-rc7","v4.4.10","v4.6-rc5","v4.5-rc4","v4.6-rc2","v4.4.9","v4.6-rc3","v4.4.8","v4.5","v4.4.7","v4.4.6","v4.4","v4.5-rc1","v4.5-rc6","v4.4.5","v4.5-rc2","v4.5-rc7","v4.5-rc5","v4.4.4","v4.5-rc3","v4.4.3","v4.4.2","v4.4.1","v4.4-rc1","v4.4-rc2","v4.4-rc8","v4.4-rc3","v4.4-rc7","v4.4-rc5","v4.4-rc6","v4.4-rc4","v4.3","v4.3-rc1","v4.3-rc6","v4.3-rc4","v4.3-rc2","v4.3-rc7","v4.3-rc5","v4.3-rc3","v4.2","v4.2-rc2","v4.2-rc1","v4.2-rc8","v4.2-rc4","v4.2-rc6","v4.2-rc7","v4.0-rc5","v4.2-rc5","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","v4.0-rc1","v4.0-rc2","v4.0-rc7","v4.0-rc3","v4.0-rc6","v4.0-rc4","v3.19","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","v3.18-rc7","v3.18-rc6","v3.18-rc2","v3.18-rc3","v3.18-rc4","v3.18-rc5","v3.17","v3.16.7","v3.1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