{"id":"CVE-2024-26884","title":"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 …","summary":"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 …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-119","CWE-190"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 3.19, < 4.19.311","linux_kernel >= 4.20, < 5.4.273","linux_kernel >= 5.5, < 5.10.214","linux_kernel >= 5.11, < 5.15.153","linux_kernel >= 5.16, < 6.1.83","linux_kernel >= 6.2, < 6.6.23","linux_kernel >= 6.7, < 6.7.11","linux_kernel >= 6.8, < 6.8.2"],"patched":["linux_kernel 6.8.2"],"published":"2024-04-17","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:17:28.903","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-26884","references":[{"url":"https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/3b08cfc65f07b1132c1979d73f014ae6e04de55d","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/64f00b4df0597590b199b62a37a165473bf658a6","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/6787d916c2cf9850c97a0a3f73e08c43e7d973b1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/8435f0961bf3dc65e204094349bd9aeaac1f8868","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/a6fa75b5096c0f9826a4fabe22d907b0a5bb1016","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/a83fdaeaea3677b83a53f72ace2d73a19bcd6d93","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/d817f0d34d927f2deb17dadbfe212c9a6a32ac3e","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00251,"epssPercentile":0.15253,"ingestedAt":"2026-10-15T03:30:12.656Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2024-10-30T19:28:25.440727Z"},"slug":"CVE-2024-26884","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `linux_kernel >= 3.19, < 4.19.311`\n- `linux_kernel >= 4.20, < 5.4.273`\n- `linux_kernel >= 5.5, < 5.10.214`\n- `linux_kernel >= 5.11, < 5.15.153`\n- `linux_kernel >= 5.16, < 6.1.83`\n- `linux_kernel >= 6.2, < 6.6.23`\n- `linux_kernel >= 6.7, < 6.7.11`\n- `linux_kernel >= 6.8, < 6.8.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.8.2`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}