{"id":"CVE-2026-68158","summary":"libceph: Fix multiplication overflow in decode_new_up_state_weight()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix multiplication overflow in decode_new_up_state_weight()\n\nIf a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted\nosdmap, out-of-bounds memory accesses may occur in\ndecode_new_up_state_weight(). This happens because the bounds check for\nthe new_state part is based on calculating its length depending on a len\nvalue read from the incoming message. This calculation may overflow\nleading to an incorrect bounds check. Subsequently, out-of-bounds reads\nmay occur when decoding this part.\n\nThis patch switches the multiplication to use check_mul_overflow() to\nabort processing the osdmap if an overflow occurred. Therefore,\nosdmaps/messages containing large values for len that result in a\nmultiplication overflow are treated as invalid.\n\n[ idryomov: rename new_state_len -\u003e new_state_item_size, formatting ]","modified":"2026-08-21T03:30:13.227341550Z","published":"2026-08-10T11:59:24.675Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68158.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/05c90e059269f087becfcce23348496085835c29"},{"type":"WEB","url":"https://git.kernel.org/stable/c/143ba49ead77ec483c0326f8aaad8649874e99c4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1732d89dfcd74f6fde9ce70900d316c4a151c153"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2ceee3b77b83052648c40fef965f836fd7699d26"},{"type":"WEB","url":"https://git.kernel.org/stable/c/98917a499ec7064c14fc56d180a4fd636fc2784c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bee4b5b53e7bff0467fd916cc44c9b190733c6bd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e4473751cc37db41f3f7da25d64a23e0c74570f1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f6961070c326bd158c38fa48756cde2bd78c4aaa"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68158.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68158"},{"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":"930c532869774ebf8af9efe9484c597f896a7d46"},{"fixed":"2ceee3b77b83052648c40fef965f836fd7699d26"},{"fixed":"e4473751cc37db41f3f7da25d64a23e0c74570f1"},{"fixed":"f6961070c326bd158c38fa48756cde2bd78c4aaa"},{"fixed":"05c90e059269f087becfcce23348496085835c29"},{"fixed":"143ba49ead77ec483c0326f8aaad8649874e99c4"},{"fixed":"1732d89dfcd74f6fde9ce70900d316c4a151c153"},{"fixed":"bee4b5b53e7bff0467fd916cc44c9b190733c6bd"},{"fixed":"98917a499ec7064c14fc56d180a4fd636fc2784c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"1196c36fd53c3b1615eb02f986cb727b1dfc1047"},{"last_affected":"bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196"},{"last_affected":"6b96b2d473701b45df3fea8dd9796b6ec39e6d54"},{"last_affected":"7405d73cea0d0e6c541f5c534078feeb46188844"},{"last_affected":"8777c9f654637d56f4c4ca54eb1bc7c609b70085"},{"last_affected":"6831c98ce0b8a3e88db64aa224372effd0dcc694"},{"last_affected":"032951d32c13b7564dfba82758260cb7aa1149d2"},{"last_affected":"14877928f10667a5606383885d004f7185f33718"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.10.103"},{"fixed":"3.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.12.63"},{"fixed":"3.13"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.14.75"},{"fixed":"3.15"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.16.39"},{"fixed":"3.17"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.18.39"},{"fixed":"3.19"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.1.30"},{"fixed":"4.2"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.4.17"},{"fixed":"4.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.6.6"},{"fixed":"4.7"}]}],"versions":["v3.16.38","v3.16.37","v3.16.36","v3.10.102","v4.6.5","v4.4.16","v3.14.74","v4.1.29","v3.18.38","v3.14.73","v4.4.15","v4.6.4","v3.12.62","v3.18.37","v4.1.28","v4.4.14","v4.6.3","v3.18.36","v4.1.27","v4.6.2","v4.4.13","v3.14.72","v3.12.61","v3.18.35","v4.6","v4.1.26","v4.6-rc1","v3.16.35","v4.6.1","v4.4.12","v3.14.71","v3.10.101","v4.4.11","v3.14.70","v3.18.34","v4.1.25","v3.12.60","v4.6-rc6","v4.6-rc4","v4.6-rc7","v4.4.10","v3.14.69","v4.6-rc5","v4.5-rc4","v3.18.33","v4.1.24","v4.6-rc2","v4.4.9","v3.14.68","v4.6-rc3","v3.18.32","v4.1.23","v3.14.67","v4.4.8","v3.12.59","v4.5","v4.4.7","v3.14.66","v3.18.31","v4.1.22","v3.12.58","v3.14.65","v4.4.6","v3.18.30","v4.1.21","v3.12.57","v4.4","v4.5-rc1","v3.18.29","v4.5-rc6","v4.1.20","v4.4.5","v3.14.64","v3.10.100","v4.5-rc2","v4.5-rc7","v4.5-rc5","v4.4.4","v3.14.63","v3.10.99","v4.5-rc3","v3.12.56","v3.18.28","v4.1.19","v4.4.3","v3.14.62","v3.10.98","v3.12.55","v4.4.2","v3.14.61","v3.10.97","v3.18.27","v4.1.18","v3.10.96","v3.14.60","v4.4.1","v3.12.54","v3.18.26","v4.1.17","v4.1.16","v3.14.59","v3.10.95","v3.12.53","v4.1.15","v3.14.58","v3.10.94","v4.4-rc1","v4.4-rc2","v4.4-rc8","v3.18.25","v4.4-rc3","v4.4-rc7","v4.4-rc5","v3.12.52","v4.4-rc6","v4.4-rc4","v4.3","v4.1.14","v4.1.13","v3.14.57","v3.10.93","v3.12.51","v3.18.24","v4.3-rc1","v4.1.12","v3.14.56","v3.10.92","v4.3-rc6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