{"id":"CVE-2021-3506","title":"An out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4","summary":"An out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to …","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","cwe":["CWE-125","CWE-125"],"vendor":"netapp","product":"cloud_backup","affected":["linux_kernel < 4.19.191","linux_kernel >= 4.20, < 5.4.118","linux_kernel >= 5.5, < 5.10.36","linux_kernel >= 5.11, < 5.11.20","linux_kernel >= 5.12, < 5.12.3","linux_kernel = 5.12","debian_linux = 9.0","cloud_backup","solidfire_baseboard_management_controller_firmware","h300s_firmware","h500s_firmware","h700s_firmware","h300e_firmware","h500e_firmware","h700e_firmware","h410s_firmware","h410c_firmware"],"patched":["linux_kernel 5.12.3"],"published":"2021-04-19","updated":"2026-09-01","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-3506","references":[{"url":"http://www.openwall.com/lists/oss-security/2021/05/08/1","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1944298","label":"secalert@redhat.com"},{"url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html","label":"secalert@redhat.com"},{"url":"https://security.netapp.com/advisory/ntap-20210611-0007/","label":"secalert@redhat.com"},{"url":"https://www.mail-archive.com/linux-kernel%40vger.kernel.org/msg2520013.html","label":"secalert@redhat.com"},{"url":"https://www.openwall.com/lists/oss-security/2021/03/28/2","label":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2021/05/08/1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1944298","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20210611-0007/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.mail-archive.com/linux-kernel%40vger.kernel.org/msg2520013.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.openwall.com/lists/oss-security/2021/03/28/2","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00366,"epssPercentile":0.27717,"ingestedAt":"2026-09-01T18:30:36.359Z","slug":"CVE-2021-3506","body":"## Overview\n\nAn out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.\n\n## Affected\n\n- `linux_kernel < 4.19.191`\n- `linux_kernel >= 4.20, < 5.4.118`\n- `linux_kernel >= 5.5, < 5.10.36`\n- `linux_kernel >= 5.11, < 5.11.20`\n- `linux_kernel >= 5.12, < 5.12.3`\n- `linux_kernel = 5.12`\n- `debian_linux = 9.0`\n- `cloud_backup`\n- `solidfire_baseboard_management_controller_firmware`\n- `h300s_firmware`\n- `h500s_firmware`\n- `h700s_firmware`\n- `h300e_firmware`\n- `h500e_firmware`\n- `h700e_firmware`\n- `h410s_firmware`\n- `h410c_firmware`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.12.3`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}