{"id":"CVE-2026-97537","state":"PUBLISHED","title":"scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking\n\nqla25xx_free_req_que() and qla25xx_free_rsp_que() have two pre-existing\nbugs exposed on the error path of qla25xx_create_{req,rsp}_que():\n\n 1. When dma_alloc_coherent() fails during queue creation, the error\n    path calls the free function with req->ring / rsp->ring still NULL\n    (from kzalloc).  The unconditional dma_free_coherent() with a NULL\n    cpu_addr is undefined behavior and can panic.\n\n 2. The free functions clear req_qid_map / rsp_qid_map under vport_lock,\n    but the create functions protect the same bitmaps with mq_lock.\n    This provides no mutual exclusion.  Additionally, the create error\n    path clears the bit and releases mq_lock before calling the free\n    function, creating a window where another thread can allocate the\n    same que_id and have its ha->req_q_map entry clobbered by the\n    subsequent lockless NULL assignment in the free function.\n\nFix by:\n\n - Guarding dma_free_coherent() with a NULL check on the ring pointer.\n\n - Using mq_lock (the lock held by all creators) in the free functions\n   to atomically NULL the map entry and clear the bitmap bit.\n\n - Removing the now-redundant clear_bit blocks from the create error\n   paths since the free functions handle it atomically.","publishedAt":"2026-09-25T10:21:35.608Z","updatedAt":"2026-10-30T12:37:17.869Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"b65e3a82f77b7a63e386623d2ea70d2b5580295a","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"a9ff85886425355c72749be6090758aa19a89f16","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"81ee4df2a488f0909f7ff563e88a0e0099485a8b","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"2e6f60adf609c77e828f64e0cd371920bef91c12","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"56e25d716833604fd5bff388e472f290bfe793aa","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"f35cb67f2092b49d7949065dd56895ed47238f22","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"94fc0c5b45de2bf3a691619bcfd10b9a49fc647e","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"34a40e0dff940ac5eba494a69b553ea571e24873","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_mid.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.29","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_mid.c"]}],"references":["https://git.kernel.org/stable/c/b65e3a82f77b7a63e386623d2ea70d2b5580295a","https://git.kernel.org/stable/c/a9ff85886425355c72749be6090758aa19a89f16","https://git.kernel.org/stable/c/81ee4df2a488f0909f7ff563e88a0e0099485a8b","https://git.kernel.org/stable/c/2e6f60adf609c77e828f64e0cd371920bef91c12","https://git.kernel.org/stable/c/56e25d716833604fd5bff388e472f290bfe793aa","https://git.kernel.org/stable/c/f35cb67f2092b49d7949065dd56895ed47238f22","https://git.kernel.org/stable/c/94fc0c5b45de2bf3a691619bcfd10b9a49fc647e","https://git.kernel.org/stable/c/34a40e0dff940ac5eba494a69b553ea571e24873"],"weaknesses":[],"ingestedAt":"2026-10-30T12:56:04.490Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/97xxx/CVE-2026-97537.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97537","state":"PUBLISHED","datePublished":"2026-09-25T10:21:35.608Z","dateUpdated":"2026-10-30T12:37:17.869Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-24T16:01:01.153Z"},"containers":{"cna":{"title":"scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking\n\nqla25xx_free_req_que() and qla25xx_free_rsp_que() have two pre-existing\nbugs exposed on the error path of qla25xx_create_{req,rsp}_que():\n\n 1. When dma_alloc_coherent() fails during queue creation, the error\n    path calls the free function with req->ring / rsp->ring still NULL\n    (from kzalloc).  The unconditional dma_free_coherent() with a NULL\n    cpu_addr is undefined behavior and can panic.\n\n 2. The free functions clear req_qid_map / rsp_qid_map under vport_lock,\n    but the create functions protect the same bitmaps with mq_lock.\n    This provides no mutual exclusion.  Additionally, the create error\n    path clears the bit and releases mq_lock before calling the free\n    function, creating a window where another thread can allocate the\n    same que_id and have its ha->req_q_map entry clobbered by the\n    subsequent lockless NULL assignment in the free function.\n\nFix by:\n\n - Guarding dma_free_coherent() with a NULL check on the ring pointer.\n\n - Using mq_lock (the lock held by all creators) in the free functions\n   to atomically NULL the map entry and clear the bitmap bit.\n\n - Removing the now-redundant clear_bit blocks from the create error\n   paths since the free functions handle it atomically."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"b65e3a82f77b7a63e386623d2ea70d2b5580295a","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"a9ff85886425355c72749be6090758aa19a89f16","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"81ee4df2a488f0909f7ff563e88a0e0099485a8b","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"2e6f60adf609c77e828f64e0cd371920bef91c12","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"56e25d716833604fd5bff388e472f290bfe793aa","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"f35cb67f2092b49d7949065dd56895ed47238f22","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"94fc0c5b45de2bf3a691619bcfd10b9a49fc647e","versionType":"git"},{"version":"73208dfd7ab19f379d73e8a0fbf30f92c203e5e8","status":"affected","lessThan":"34a40e0dff940ac5eba494a69b553ea571e24873","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_mid.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.29","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_mid.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/b65e3a82f77b7a63e386623d2ea70d2b5580295a"},{"url":"https://git.kernel.org/stable/c/a9ff85886425355c72749be6090758aa19a89f16"},{"url":"https://git.kernel.org/stable/c/81ee4df2a488f0909f7ff563e88a0e0099485a8b"},{"url":"https://git.kernel.org/stable/c/2e6f60adf609c77e828f64e0cd371920bef91c12"},{"url":"https://git.kernel.org/stable/c/56e25d716833604fd5bff388e472f290bfe793aa"},{"url":"https://git.kernel.org/stable/c/f35cb67f2092b49d7949065dd56895ed47238f22"},{"url":"https://git.kernel.org/stable/c/94fc0c5b45de2bf3a691619bcfd10b9a49fc647e"},{"url":"https://git.kernel.org/stable/c/34a40e0dff940ac5eba494a69b553ea571e24873"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:37:17.869Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}