{"id":"CVE-2021-41864","title":"prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write.","summary":"prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write.","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-190"],"vendor":"netapp","product":"cloud_backup","affected":["linux_kernel >= 4.6, < 4.9.287","linux_kernel >= 4.10, < 4.14.251","linux_kernel >= 4.15, < 4.19.211","linux_kernel >= 4.20, < 5.4.153","linux_kernel >= 5.5, < 5.10.73","linux_kernel >= 5.11, < 5.14.12","fedora = 33","fedora = 34","fedora = 35","cloud_backup","hci_management_node","solidfire","h410c_firmware","h300s_firmware","h500s_firmware","h700s_firmware","h300e_firmware","h500e_firmware","h700e_firmware","h410s_firmware","solidfire_baseboard_management_controller_firmware","debian_linux = 9.0","debian_linux = 10.0"],"patched":["linux_kernel 5.14.12"],"published":"2021-10-02","updated":"2026-08-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-41864","references":[{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.12","label":"cve@mitre.org"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=30e29a9a2bc6a4888335a6ede968b75cd329657a","label":"cve@mitre.org"},{"url":"https://github.com/torvalds/linux/commit/30e29a9a2bc6a4888335a6ede968b75cd329657a","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7BLLVKYAIETEORUPTFO3TR3C33ZPFXQM/","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAT3RERO6QBKSPJBNNRWY3D4NCGTFOS7/","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SYKURLXBB2555ASWMPDNMBUPD6AG2JKQ/","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20211029-0004/","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2022/dsa-5096","label":"cve@mitre.org"},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.12","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=30e29a9a2bc6a4888335a6ede968b75cd329657a","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/torvalds/linux/commit/30e29a9a2bc6a4888335a6ede968b75cd329657a","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7BLLVKYAIETEORUPTFO3TR3C33ZPFXQM/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAT3RERO6QBKSPJBNNRWY3D4NCGTFOS7/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SYKURLXBB2555ASWMPDNMBUPD6AG2JKQ/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20211029-0004/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2022/dsa-5096","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00409,"epssPercentile":0.34783,"ingestedAt":"2026-08-05T18:50:24.876Z","slug":"CVE-2021-41864","body":"## Overview\n\nprealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write.\n\n## Affected\n\n- `linux_kernel >= 4.6, < 4.9.287`\n- `linux_kernel >= 4.10, < 4.14.251`\n- `linux_kernel >= 4.15, < 4.19.211`\n- `linux_kernel >= 4.20, < 5.4.153`\n- `linux_kernel >= 5.5, < 5.10.73`\n- `linux_kernel >= 5.11, < 5.14.12`\n- `fedora = 33`\n- `fedora = 34`\n- `fedora = 35`\n- `cloud_backup`\n- `hci_management_node`\n- `solidfire`\n- `h410c_firmware`\n- `h300s_firmware`\n- `h500s_firmware`\n- `h700s_firmware`\n- `h300e_firmware`\n- `h500e_firmware`\n- `h700e_firmware`\n- `h410s_firmware`\n- `solidfire_baseboard_management_controller_firmware`\n- `debian_linux = 9.0`\n- `debian_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.14.12`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}