{"id":"CVE-2023-53794","title":"cifs: fix session state check in reconnect to avoid use-after-free issue","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix session state check in reconnect to avoid use-after-free issue\n\nDon't collect exiting session in smb2_reconnect_server(), because it\nwill be released soon.\n\nN…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 4fcd1813e6404dd4420c7d12fb483f9320f0bf93 < 7e4f5c3f01fb0e51ca438e43262d858daf9a0a76","Linux >= 4fcd1813e6404dd4420c7d12fb483f9320f0bf93 < 759ffc164d95a32c09528766d74d9b4fb054e8f4","Linux >= 4fcd1813e6404dd4420c7d12fb483f9320f0bf93 < 99f280700b4cc02d5f141b8d15f8e9fad0418f65","Linux 655e0c067f0e02ece03fd0591dabe3db2ae27552","Linux 875cc09c0767a4ac06b57af383709657f98b3ea1","Linux 599fe1409085059ba12a2c3897c853be9fa9e7cf","Linux 2e4378ee60049b752c9dce16f62ce6fbd11b379a","Linux 59b520454b323ec43b2ae757217332cea33091e0","Linux e20c888e2b3576e5f498c167729d274ef60b86f8","Linux 4ce7aa4e44d88ce64ea8ae2337b8910f3670b0ba","Linux 419fad68e4c4135ff9859e9214dd6cf954413ca1","Linux >= 3.10.103 < 3.11","Linux >= 3.12.63 < 3.13","Linux >= 3.14.74 < 3.15","Linux >= 3.16.37 < 3.17","Linux >= 3.18.37 < 3.19","Linux >= 4.1.28 < 4.2","Linux >= 4.4.16 < 4.5","Linux >= 4.6.5 < 4.7","Linux 4.7"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-15T21:37:15.568860Z"},"published":"2025-12-09","updated":"2026-10-15","sourceUpdated":"2026-10-15T21:41:36.158Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53794","references":[{"url":"https://git.kernel.org/stable/c/7e4f5c3f01fb0e51ca438e43262d858daf9a0a76"},{"url":"https://git.kernel.org/stable/c/759ffc164d95a32c09528766d74d9b4fb054e8f4"},{"url":"https://git.kernel.org/stable/c/99f280700b4cc02d5f141b8d15f8e9fad0418f65"}],"tags":["cve.org"],"epss":0.00511,"epssPercentile":0.42121,"ingestedAt":"2026-10-15T22:48:25.421Z","slug":"CVE-2023-53794","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix session state check in reconnect to avoid use-after-free issue\n\nDon't collect exiting session in smb2_reconnect_server(), because it\nwill be released soon.\n\nNote that the exiting session will stay in server->smb_ses_list until\nit complete the cifs_free_ipc() and logoff() and then delete itself\nfrom the list.\n\n## Affected\n\n- `Linux >= 4fcd1813e6404dd4420c7d12fb483f9320f0bf93 < 7e4f5c3f01fb0e51ca438e43262d858daf9a0a76`\n- `Linux >= 4fcd1813e6404dd4420c7d12fb483f9320f0bf93 < 759ffc164d95a32c09528766d74d9b4fb054e8f4`\n- `Linux >= 4fcd1813e6404dd4420c7d12fb483f9320f0bf93 < 99f280700b4cc02d5f141b8d15f8e9fad0418f65`\n- `Linux 655e0c067f0e02ece03fd0591dabe3db2ae27552`\n- `Linux 875cc09c0767a4ac06b57af383709657f98b3ea1`\n- `Linux 599fe1409085059ba12a2c3897c853be9fa9e7cf`\n- `Linux 2e4378ee60049b752c9dce16f62ce6fbd11b379a`\n- `Linux 59b520454b323ec43b2ae757217332cea33091e0`\n- `Linux e20c888e2b3576e5f498c167729d274ef60b86f8`\n- `Linux 4ce7aa4e44d88ce64ea8ae2337b8910f3670b0ba`\n- `Linux 419fad68e4c4135ff9859e9214dd6cf954413ca1`\n- `Linux >= 3.10.103 < 3.11`\n- `Linux >= 3.12.63 < 3.13`\n- `Linux >= 3.14.74 < 3.15`\n- `Linux >= 3.16.37 < 3.17`\n- `Linux >= 3.18.37 < 3.19`\n- `Linux >= 4.1.28 < 4.2`\n- `Linux >= 4.4.16 < 4.5`\n- `Linux >= 4.6.5 < 4.7`\n- `Linux 4.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}