{"id":"CVE-2024-27414","summary":"rtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nrtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back\n\nIn the commit d73ef2d69c0d (\"rtnetlink: let rtnl_bridge_setlink checks\nIFLA_BRIDGE_MODE length\"), an adjustment was made to the old loop logic\nin the function `rtnl_bridge_setlink` to enable the loop to also check\nthe length of the IFLA_BRIDGE_MODE attribute. However, this adjustment\nremoved the `break` statement and led to an error logic of the flags\nwriting back at the end of this function.\n\nif (have_flags)\n    memcpy(nla_data(attr), &flags, sizeof(flags));\n    // attr should point to IFLA_BRIDGE_FLAGS NLA !!!\n\nBefore the mentioned commit, the `attr` is granted to be IFLA_BRIDGE_FLAGS.\nHowever, this is not necessarily true fow now as the updated loop will let\nthe attr point to the last NLA, even an invalid NLA which could cause\noverflow writes.\n\nThis patch introduces a new variable `br_flag` to save the NLA pointer\nthat points to IFLA_BRIDGE_FLAGS and uses it to resolve the mentioned\nerror logic.","modified":"2026-04-02T10:07:58.115469Z","published":"2024-05-17T11:50:57.207Z","related":["SUSE-SU-2024:2571-1","SUSE-SU-2024:2896-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27414.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/167d8642daa6a44b51de17f8ff0f584e1e762db7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/743ad091fb46e622f1b690385bb15e3cd3daf874"},{"type":"WEB","url":"https://git.kernel.org/stable/c/831bc2728fb48a8957a824cba8c264b30dca1425"},{"type":"WEB","url":"https://git.kernel.org/stable/c/882a51a10ecf24ce135d573afa0872aef02c5125"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1227b27fcccc99dc44f912b479e01a17e2d7d31"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9fbc44159dfc3e9a7073032752d9e03f5194a6f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f2261eb994aa5757c1da046b78e3229a3ece0ad9"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27414.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-27414"},{"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":"ad46d4861ed36315d3d9e838723ba3e367ecc042"},{"fixed":"b9fbc44159dfc3e9a7073032752d9e03f5194a6f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"abb0172fa8dc4a4ec51aa992b7269ed65959f310"},{"fixed":"882a51a10ecf24ce135d573afa0872aef02c5125"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"047508edd602921ee8bb0f2aa2100aa2e9bedc75"},{"fixed":"a1227b27fcccc99dc44f912b479e01a17e2d7d31"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8dfac8071d58447e5cace4c4c6fe493ce2f615f6"},{"fixed":"f2261eb994aa5757c1da046b78e3229a3ece0ad9"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d73ef2d69c0dba5f5a1cb9600045c873bab1fb7f"},{"fixed":"167d8642daa6a44b51de17f8ff0f584e1e762db7"},{"fixed":"831bc2728fb48a8957a824cba8c264b30dca1425"},{"fixed":"743ad091fb46e622f1b690385bb15e3cd3daf874"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"00757f58e37b2d9a6f99e15be484712390cd2bab"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-27414.json"}}],"schema_version":"1.7.5"}