{"id":"CVE-2023-52811","summary":"scsi: ibmvfc: Remove BUG_ON in the case of an empty event pool","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ibmvfc: Remove BUG_ON in the case of an empty event pool\n\nIn practice the driver should never send more commands than are allocated\nto a queue's event pool. In the unlikely event that this happens, the code\nasserts a BUG_ON, and in the case that the kernel is not configured to\ncrash on panic returns a junk event pointer from the empty event list\ncausing things to spiral from there. This BUG_ON is a historical artifact\nof the ibmvfc driver first being upstreamed, and it is well known now that\nthe use of BUG_ON is bad practice except in the most unrecoverable\nscenario. There is nothing about this scenario that prevents the driver\nfrom recovering and carrying on.\n\nRemove the BUG_ON in question from ibmvfc_get_event() and return a NULL\npointer in the case of an empty event pool. Update all call sites to\nibmvfc_get_event() to check for a NULL pointer and perfrom the appropriate\nfailure or recovery action.","modified":"2026-03-11T19:31:56.367991Z","published":"2024-05-21T15:31:20.282Z","related":["SUSE-SU-2024:2008-1","SUSE-SU-2024:2011-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2189-1","SUSE-SU-2024:2190-1","SUSE-SU-2024:2360-1","SUSE-SU-2024:2381-1","SUSE-SU-2024:2561-1","SUSE-SU-2024:2571-1","SUSE-SU-2024:2896-1","SUSE-SU-2024:2973-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52811.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/88984ec4792766df5a9de7a2ff2b5f281f94c7d4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8bbe784c2ff28d56ca0c548aaf3e584edc77052d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b39f2d10b86d0af353ea339e5815820026bca48f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d2af4ef80601224b90630c1ddc7cd2c7c8ab4dd8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e1d1f79b1929dce470a5dc9281c574cd58e8c6c0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52811.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52811"},{"type":"WEB"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"072b91f9c6510d0ec4a49d07dbc318760c7da7b3"},{"fixed":"e1d1f79b1929dce470a5dc9281c574cd58e8c6c0"},{"fixed":"88984ec4792766df5a9de7a2ff2b5f281f94c7d4"},{"fixed":"d2af4ef80601224b90630c1ddc7cd2c7c8ab4dd8"},{"fixed":"8bbe784c2ff28d56ca0c548aaf3e584edc77052d"},{"fixed":"b39f2d10b86d0af353ea339e5815820026bca48f"}]}],"versions":["v2.6.26","v2.6.26-rc6","v2.6.26-rc7","v2.6.26-rc8","v2.6.26-rc9","v2.6.27","v2.6.27-rc1","v2.6.27-rc2","v2.6.27-rc3","v2.6.27-rc4","v2.6.27-rc5","v2.6.27-rc6","v2.6.27-rc7","v2.6.27-rc8","v2.6.27-rc9","v2.6.28","v2.6.28-rc1","v2.6.28-rc2","v2.6.28-rc3","v2.6.28-rc4","v2.6.28-rc5","v2.6.28-rc6","v2.6.28-rc7","v2.6.28-rc8","v2.6.28-rc9","v2.6.29","v2.6.29-rc1","v2.6.29-rc2","v2.6.29-rc3","v2.6.29-rc4","v2.6.29-rc5","v2.6.29-rc6","v2.6.29-rc7","v2.6.29-rc8","v2.6.30","v2.6.30-rc1","v2.6.30-rc2","v2.6.30-rc3","v2.6.30-rc4","v2.6.30-rc5","v2.6.30-rc6","v2.6.30-rc7","v2.6.30-rc8","v2.6.31","v2.6.31-rc1","v2.6.31-rc2","v2.6.31-rc3","v2.6.31-rc4","v2.6.31-rc5","v2.6.31-rc6","v2.6.31-rc7","v2.6.31-rc8","v2.6.31-rc9","v2.6.32","v2.6.32-rc1","v2.6.32-rc2","v2.6.32-rc3","v2.6.32-rc4","v2.6.32-rc5","v2.6.32-rc6","v2.6.32-rc7","v2.6.32-rc8","v2.6.33","v2.6.33-rc1","v2.6.33-rc2","v2.6.33-rc3","v2.6.33-rc4","v2.6.33-rc5","v2.6.33-rc6","v2.6.33-rc7","v2.6.33-rc8","v2.6.34","v2.6.34-rc1","v2.6.34-rc2","v2.6.34-rc3","v2.6.34-rc4","v2.6.34-rc5","v2.6.34-rc6","v2.6.34-rc7","v2.6.35","v2.6.35-rc1","v2.6.35-rc2","v2.6.35-rc3","v2.6.35-rc4","v2.6.35-rc5","v2.6.35-rc6","v2.6.36","v2.6.36-rc1","v2.6.36-rc2","v2.6.36-rc3","v2.6.36-rc4","v2.6.36-rc5","v2.6.36-rc6","v2.6.36-rc7","v2.6.36-rc8","v2.6.37","v2.6.37-rc1","v2.6.37-rc2","v2.6.37-rc3","v2.6.37-rc4","v2.6.37-rc5","v2.6.37-rc6","v2.6.37-rc7","v2.6.37-rc8","v2.6.38","v2.6.38-rc1","v2.6.38-rc2","v2.6.38-rc3","v2.6.38-rc4","v2.6.38-rc5","v2.6.38-rc6","v2.6.38-rc7","v2.6.38-rc8","v2.6.39","v2.6.39-rc1","v2.6.39-rc2","v2.6.39-rc3","v2.6.39-rc4","v2.6.39-rc5","v2.6.39-rc6","v2.6.39-rc7","v3.0","v3.0-rc1","v3.0-rc2","v3.0-rc3","v3.0-rc4","v3.0-rc5","v3.0-rc6","v3.0-rc7","v3.1","v3.1-rc1","v3.1-rc10","v3.1-rc2","v3.1-rc3","v3.1-rc4","v3.1-rc5","v3.1-rc6","v3.1-rc7","v3.1-rc8","v3.1-rc9","v3.10","v3.10-rc1","v3.10-rc2","v3.10-rc3","v3.10-rc4","v3.10-rc5","v3.10-rc6","v3.10-rc7","v3.11","v3.11-rc1","v3.11-rc2","v3.11-rc3","v3.11-rc4","v3.11-rc5","v3.11-rc6","v3.11-rc7","v3.12","v3.12-rc1","v3.12-rc2","v3.12-rc3","v3.12-rc4","v3.12-rc5","v3.12-rc6","v3.12-rc7","v3.13","v3.13-rc1","v3.13-rc2","v3.13-rc3","v3.13-rc4","v3.13-rc5","v3.13-rc6","v3.13-rc7","v3.13-rc8","v3.14","v3.14-rc1","v3.14-rc2","v3.14-rc3","v3.14-rc4","v3.14-rc5","v3.14-rc6","v3.14-rc7","v3.14-rc8","v3.15","v3.15-rc1","v3.15-rc2","v3.15-rc3","v3.15-rc4","v3.15-rc5","v3.15-rc6","v3.15-rc7","v3.15-rc8","v3.16","v3.16-rc1","v3.16-rc2","v3.16-rc3","v3.16-rc4","v3.16-rc5","v3.16-rc6","v3.16-rc7","v3.17","v3.17-rc1","v3.17-rc2","v3.17-rc3","v3.17-rc4","v3.17-rc5","v3.17-rc6","v3.17-rc7","v3.18","v3.18-rc1","v3.18-rc2","v3.18-rc3","v3.18-rc4","v3.18-rc5","v3.18-rc6","v3.18-rc7","v3.19","v3.19-rc1","v3.19-rc2","v3.19-rc3","v3.19-rc4","v3.19-rc5","v3.19-rc6","v3.19-rc7","v3.2","v3.2-rc1","v3.2-rc2","v3.2-rc3","v3.2-rc4","v3.2-rc5","v3.2-rc6","v3.2-rc7","v3.3","v3.3-rc1","v3.3-rc2","v3.3-rc3","v3.3-rc4","v3.3-rc5","v3.3-rc6","v3.3-rc7","v3.4","v3.4-rc1","v3.4-rc2","v3.4-rc3","v3.4-rc4","v3.4-rc5","v3.4-rc6","v3.4-rc7","v3.5","v3.5-rc1","v3.5-rc2","v3.5-rc3","v3.5-rc4","v3.5-rc5","v3.5-rc6","v3.5-rc7","v3.6","v3.6-rc1","v3.6-rc2","v3.6-rc3","v3.6-rc4","v3.6-rc5","v3.6-rc6","v3.6-rc7","v3.7","v3.7-rc1","v3.7-rc2","v3.7-r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