{"id":"CVE-2021-23134","title":"Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to elevate their privileges","summary":"Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local user with the CAP_NET_RAW …","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-416","CWE-416"],"vendor":"netapp","product":"cloud_backup","affected":["cloud_backup","h300s_firmware","h500s_firmware","h700s_firmware","h410s_firmware","h410c_firmware","solidfire_baseboard_management_controller_firmware","linux_kernel < 4.4.269","linux_kernel >= 4.5, < 4.9.269","linux_kernel >= 4.10, < 4.14.233","linux_kernel >= 4.15, < 4.19.191","linux_kernel >= 4.20, < 5.4.119","linux_kernel >= 5.5, < 5.10.37","linux_kernel >= 5.11, < 5.11.21","linux_kernel >= 5.12, < 5.12.4","fedora = 33","fedora = 34","debian_linux = 9.0"],"patched":["linux_kernel 5.12.4"],"published":"2021-05-12","updated":"2026-07-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-23134","references":[{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=c61760e6940d","label":"psirt@paloaltonetworks.com"},{"url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html","label":"psirt@paloaltonetworks.com"},{"url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html","label":"psirt@paloaltonetworks.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZYORWNQIHNWRFYRDXBWYWBYM46PDZEN/","label":"psirt@paloaltonetworks.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QALNQT4LJFVSSA3MWCIECVY4AFPP4X77/","label":"psirt@paloaltonetworks.com"},{"url":"https://security.netapp.com/advisory/ntap-20210625-0007/","label":"psirt@paloaltonetworks.com"},{"url":"https://www.openwall.com/lists/oss-security/2021/05/11/4","label":"psirt@paloaltonetworks.com"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=c61760e6940d","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://lists.debian.org/debian-lts-announce/2021/06/msg00020.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZYORWNQIHNWRFYRDXBWYWBYM46PDZEN/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QALNQT4LJFVSSA3MWCIECVY4AFPP4X77/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20210625-0007/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.openwall.com/lists/oss-security/2021/05/11/4","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00372,"epssPercentile":0.30931,"ingestedAt":"2026-07-30T19:55:34.861Z","slug":"CVE-2021-23134","body":"## Overview\n\nUse After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local user with the CAP_NET_RAW capability.\n\n## Affected\n\n- `cloud_backup`\n- `h300s_firmware`\n- `h500s_firmware`\n- `h700s_firmware`\n- `h410s_firmware`\n- `h410c_firmware`\n- `solidfire_baseboard_management_controller_firmware`\n- `linux_kernel < 4.4.269`\n- `linux_kernel >= 4.5, < 4.9.269`\n- `linux_kernel >= 4.10, < 4.14.233`\n- `linux_kernel >= 4.15, < 4.19.191`\n- `linux_kernel >= 4.20, < 5.4.119`\n- `linux_kernel >= 5.5, < 5.10.37`\n- `linux_kernel >= 5.11, < 5.11.21`\n- `linux_kernel >= 5.12, < 5.12.4`\n- `fedora = 33`\n- `fedora = 34`\n- `debian_linux = 9.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.12.4`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}