{"id":"CVE-2024-26884","revision":"6a8d582ee18440628b8dfb5c1dfe3eb8","records":[{"revision":"6a8d582ee18440628b8dfb5c1dfe3eb8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-26884","aliases":[],"title":"bpf: Fix hashtab overflow check on 32-bit arches","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix hashtab overflow check on 32-bit arches\n\nThe hashtab code relies on roundup_pow_of_two() to compute the number of\nhash buckets, and contains an overflow check by checking if the\nresulting value is 0. However, on 32-bit arches, the roundup code itself\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\nwhich is undefined behaviour, so it is not guaranteed to truncate\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\ncontains the same check, copied from the hashtab code. So apply the same\nfix to hashtab, by moving the overflow check to before the roundup.","state":0,"publishedAt":"2024-04-17T10:27:39.672+00:00","modifiedAt":"2026-10-15T00:39:06.476+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/bpf/hashtab.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"daaf427c6ab392bedcd018e326b2ffa1e1110cd6\",\n                            \"lessThan\": \"33ec04cadb77605b71d9298311919303d390c4d5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"daaf427c6ab392bedcd018e326b2ffa1e1110cd6\",\n                            \"lessThan\": \"92c81fbb3ed2e0dfc33a4183a67135e1ab566ace\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"daaf427c6ab392bedcd018e326b2ffa1e1110cd6\",\n                            \"lessThan\": \"64f00b4df0597590b199b62a37a165473bf658a6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"daaf427c6ab392bedcd018e326b2ffa1e1110cd6\",\n                            \"lessThan\": \"3b08cfc65f07b1132c1979d73f014ae6e04de55d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"daaf427c6ab392bedcd018e326b2ffa1e1110cd6\",\n                            \"lessThan\": \"a83fdaeaea3677b83a53f72ace2d73a19bcd6d93\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"daaf427c6ab392bedcd018e326b2ffa1e1110cd6\",\n                            \"lessThan\": \"8435f0961bf3dc65e204094349bd9aeaac1f8868\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"daaf427c6ab392bedcd018e326b2ffa1e1110cd6\",\n                            \"lessThan\": \"d817f0d34d927f2deb17dadbfe212c9a6a32ac3e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"daaf427c6ab392bedcd018e326b2ffa1e1110cd6\",\n                            \"lessThan\": \"a6fa75b5096c0f9826a4fabe22d907b0a5bb1016\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"daaf427c6ab392bedcd018e326b2ffa1e1110cd6\",\n                            \"lessThan\": \"6787d916c2cf9850c97a0a3f73e08c43e7d973b1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/bpf/hashtab.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"4.19.311\",\n                            \"lessThanOrEqual\": \"4.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.273\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.214\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.153\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.83\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.23\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.7.11\",\n                            \"lessThanOrEqual\": \"6.7.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.8.2\",\n                            \"lessThanOrEqual\": \"6.8.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.9\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5","https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace","https://git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6","https://git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d","https://git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93","https://git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868","https://git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e","https://git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016","https://git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-26884","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-26884","identifiers":["CVE-2024-26884"]},"retained":false,"historicalAffected":[]}],"coverage":[]}