{"id":"CVE-2024-26883","revision":"74a96516d81445bcac66c35058604133","records":[{"revision":"74a96516d81445bcac66c35058604133","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-26883","aliases":[],"title":"bpf: Fix stackmap overflow check on 32-bit arches","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix stackmap overflow check on 32-bit arches\n\nThe stackmap code relies on roundup_pow_of_two() to compute the number\nof hash 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.\n\nThe commit in the fixes tag actually attempted to fix this, but the fix\ndid not account for the UB, so the fix only works on CPUs where an\noverflow does result in a neat truncation to zero, which is not\nguaranteed. Checking the value before rounding does not have this\nproblem.","state":0,"publishedAt":"2024-04-17T10:27:39.036+00:00","modifiedAt":"2026-10-15T00:39:05.259+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/stackmap.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"063c722dd9d285d877e6fd499e753d6224f4c046\",\n                            \"lessThan\": \"d0e214acc59145ce25113f617311aa79dda39cb3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7e3a6b820535eb395784060ae26c5af579528fa0\",\n                            \"lessThan\": \"21e5fa4688e1a4d3db6b72216231b24232f75c1d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8032bf2af9ce26b3a362b9711d15f626ab946a74\",\n                            \"lessThan\": \"15641007df0f0d35fa28742b25c2a7db9dcd6895\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6183f4d3a0a2ad230511987c6c362ca43ec0055f\",\n                            \"lessThan\": \"ca1f06e72dec41ae4f76e7b1a8a97265447b46ae\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6183f4d3a0a2ad230511987c6c362ca43ec0055f\",\n                            \"lessThan\": \"f06899582ccee09bd85d0696290e3eaca9aa042d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6183f4d3a0a2ad230511987c6c362ca43ec0055f\",\n                            \"lessThan\": \"7070b274c7866a4c5036f8d54fcaf315c64ac33a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6183f4d3a0a2ad230511987c6c362ca43ec0055f\",\n                            \"lessThan\": \"43f798b9036491fb014b55dd61c4c5c3193267d0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6183f4d3a0a2ad230511987c6c362ca43ec0055f\",\n                            \"lessThan\": \"0971126c8164abe2004b8536b49690a0d6005b0a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6183f4d3a0a2ad230511987c6c362ca43ec0055f\",\n                            \"lessThan\": \"7a4b21250bf79eef26543d35bd390448646c536b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"253150830a012adfccf90afcebae8fda5b05a80f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"766107351731ae223ebf60ca22bdfeb47ce6acc8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4.19.177\",\n                            \"lessThan\": \"4.19.311\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.99\",\n                            \"lessThan\": \"5.4.273\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.17\",\n                            \"lessThan\": \"5.10.214\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"4.9.258\",\n                            \"lessThan\": \"4.10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"4.14.222\",\n                            \"lessThan\": \"4.15\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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/stackmap.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.11\",\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/d0e214acc59145ce25113f617311aa79dda39cb3","https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d","https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895","https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae","https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d","https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a","https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0","https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a","https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-26883","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-26883","identifiers":["CVE-2024-26883"]},"retained":false,"historicalAffected":[]}],"coverage":[]}