{"id":"CVE-2023-52479","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix uaf in smb20_oplock_break_ack\n\ndrop reference after use opinfo.","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix uaf in smb20_oplock_break_ack\n\ndrop reference after use opinfo.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel < 5.15.135","linux_kernel >= 5.16, < 6.1.57","linux_kernel >= 6.2, < 6.5.7","linux_kernel = 6.6"],"patched":["linux_kernel 6.5.7"],"published":"2024-02-29","updated":"2026-08-04","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-52479","references":[{"url":"https://git.kernel.org/stable/c/694e13732e830cbbfedb562e57f28644927c33fd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8226ffc759ea59f10067b9acdf7f94bae1c69930","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c69813471a1ec081a0b9bf0c6bd7e8afd818afce","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d5b0e9d3563e7e314a850e81f42b2ef6f39882f9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/694e13732e830cbbfedb562e57f28644927c33fd","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/8226ffc759ea59f10067b9acdf7f94bae1c69930","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/c69813471a1ec081a0b9bf0c6bd7e8afd818afce","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/d5b0e9d3563e7e314a850e81f42b2ef6f39882f9","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52479.json"},{"url":"https://access.redhat.com/security/cve/CVE-2023-52479"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2267034"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-52479"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52479"},{"url":"https://lore.kernel.org/linux-cve-announce/2024022922-CVE-2023-52479-fc87@gregkh/T/#u"}],"tags":["nvd","csaf","vex","red-hat","score-dispute"],"epss":0.00608,"epssPercentile":0.48866,"ingestedAt":"2026-08-04T10:39:39.655Z","scores":{"nvd":8.8,"vendor":5.5},"slug":"CVE-2023-52479","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix uaf in smb20_oplock_break_ack\n\ndrop reference after use opinfo.\n\n## Affected\n\n- `linux_kernel < 5.15.135`\n- `linux_kernel >= 5.16, < 6.1.57`\n- `linux_kernel >= 6.2, < 6.5.7`\n- `linux_kernel = 6.6`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.5.7`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52479.json)","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}