{"id":"CVE-2023-3389","title":"A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation.\n\nRacing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer.\n\nWe recommend upgrad…","summary":"A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation.\n\nRacing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer.\n\nWe recommend upgrad…","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":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.10.162, < 5.10.185","linux_kernel >= 5.13, < 6.4","ubuntu_linux = 14.04","ubuntu_linux = 16.04","ubuntu_linux = 18.04","ubuntu_linux = 20.04","ubuntu_linux = 22.04","debian_linux = 10.0","debian_linux = 11.0"],"patched":["linux_kernel 6.4"],"published":"2023-06-28","updated":"2026-10-14","sourceUpdated":"2026-10-14T21:17:16.660","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-3389","references":[{"url":"http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html","label":"cve-coordination@google.com"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=4716c73b188566865bdd79c3a6709696a224ac04","label":"cve-coordination@google.com"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.15.y&id=0e388fce7aec40992eadee654193cad345d62663","label":"cve-coordination@google.com"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef7dfac51d8ed961b742218f526bd589f3900a59","label":"cve-coordination@google.com"},{"url":"https://kernel.dance/0e388fce7aec40992eadee654193cad345d62663","label":"cve-coordination@google.com"},{"url":"https://kernel.dance/4716c73b188566865bdd79c3a6709696a224ac04","label":"cve-coordination@google.com"},{"url":"https://kernel.dance/ef7dfac51d8ed961b742218f526bd589f3900a59","label":"cve-coordination@google.com"},{"url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html","label":"cve-coordination@google.com"},{"url":"https://security.netapp.com/advisory/ntap-20230731-0001/","label":"cve-coordination@google.com"},{"url":"https://www.debian.org/security/2023/dsa-5480","label":"cve-coordination@google.com"},{"url":"http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=4716c73b188566865bdd79c3a6709696a224ac04","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.15.y&id=0e388fce7aec40992eadee654193cad345d62663","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef7dfac51d8ed961b742218f526bd589f3900a59","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kernel.dance/0e388fce7aec40992eadee654193cad345d62663","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kernel.dance/4716c73b188566865bdd79c3a6709696a224ac04","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kernel.dance/ef7dfac51d8ed961b742218f526bd589f3900a59","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20230731-0001/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2023/dsa-5480","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-794697.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd"],"epss":0.00669,"epssPercentile":0.50804,"ingestedAt":"2026-10-14T21:57:04.735Z","slug":"CVE-2023-3389","body":"## Overview\n\nA use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation.\n\nRacing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer.\n\nWe recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).\n\n## Affected\n\n- `linux_kernel >= 5.10.162, < 5.10.185`\n- `linux_kernel >= 5.13, < 6.4`\n- `ubuntu_linux = 14.04`\n- `ubuntu_linux = 16.04`\n- `ubuntu_linux = 18.04`\n- `ubuntu_linux = 20.04`\n- `ubuntu_linux = 22.04`\n- `debian_linux = 10.0`\n- `debian_linux = 11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.4`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}