{"id":"CVE-2026-97528","state":"PUBLISHED","title":"scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error\n\nqla_nvme_xmt_ls_rsp() obtains uctx, which was linked into\nfcport->unsol_ctx_head by qla2xxx_process_purls_iocb() and is still linked\nwhen the NVMe transport calls back to transmit the LS response. On the\nerror (out:) path the function frees uctx with kfree() but never removes\nit from the list. This leaves a freed node in fcport->unsol_ctx_head: the\nnext list_add_tail() for that fcport writes through the freed node, and a\nsubsequent list_del() can corrupt the list or panic.\n\nUnlink uctx with list_del() before kfree() on the error path, matching the\nother free sites in qla_nvme_release_lsrsp_cmd_kref() and\nqla2xxx_process_purls_pkt(). qla2x00_rel_sp() in the failure path only\nreturns the SRB to its pool and does not invoke sp->put_fn, so the out:\npath is the sole free and uctx is always still linked there.","publishedAt":"2026-09-25T10:21:30.130Z","updatedAt":"2026-10-21T12:53:03.891Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"875386b98857822b77ac7f95bdf367b70af5b78c","status":"affected","lessThan":"925a9129a514b7c3bc0a8af01e51868adbb9a83e","versionType":"git"},{"version":"875386b98857822b77ac7f95bdf367b70af5b78c","status":"affected","lessThan":"cbbf1484496aac86038e67ac984949af58009d4b","versionType":"git"},{"version":"875386b98857822b77ac7f95bdf367b70af5b78c","status":"affected","lessThan":"a95fc5f1c12bba1dbff72bd2611e7fad0758831b","versionType":"git"},{"version":"875386b98857822b77ac7f95bdf367b70af5b78c","status":"affected","lessThan":"c55d649a6cc246c3ccd5d118faea230c46b60f35","versionType":"git"},{"version":"875386b98857822b77ac7f95bdf367b70af5b78c","status":"affected","lessThan":"e46160a5d4fa59bf4d5f3412b6b5cb79edb967dd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_nvme.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","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_nvme.c"]}],"references":["https://git.kernel.org/stable/c/925a9129a514b7c3bc0a8af01e51868adbb9a83e","https://git.kernel.org/stable/c/cbbf1484496aac86038e67ac984949af58009d4b","https://git.kernel.org/stable/c/a95fc5f1c12bba1dbff72bd2611e7fad0758831b","https://git.kernel.org/stable/c/c55d649a6cc246c3ccd5d118faea230c46b60f35","https://git.kernel.org/stable/c/e46160a5d4fa59bf4d5f3412b6b5cb79edb967dd"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/97xxx/CVE-2026-97528.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97528","state":"PUBLISHED","datePublished":"2026-09-25T10:21:30.130Z","dateUpdated":"2026-10-21T12:53:03.891Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-24T16:01:01.153Z"},"containers":{"cna":{"title":"scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error\n\nqla_nvme_xmt_ls_rsp() obtains uctx, which was linked into\nfcport->unsol_ctx_head by qla2xxx_process_purls_iocb() and is still linked\nwhen the NVMe transport calls back to transmit the LS response. On the\nerror (out:) path the function frees uctx with kfree() but never removes\nit from the list. This leaves a freed node in fcport->unsol_ctx_head: the\nnext list_add_tail() for that fcport writes through the freed node, and a\nsubsequent list_del() can corrupt the list or panic.\n\nUnlink uctx with list_del() before kfree() on the error path, matching the\nother free sites in qla_nvme_release_lsrsp_cmd_kref() and\nqla2xxx_process_purls_pkt(). qla2x00_rel_sp() in the failure path only\nreturns the SRB to its pool and does not invoke sp->put_fn, so the out:\npath is the sole free and uctx is always still linked there."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"875386b98857822b77ac7f95bdf367b70af5b78c","status":"affected","lessThan":"925a9129a514b7c3bc0a8af01e51868adbb9a83e","versionType":"git"},{"version":"875386b98857822b77ac7f95bdf367b70af5b78c","status":"affected","lessThan":"cbbf1484496aac86038e67ac984949af58009d4b","versionType":"git"},{"version":"875386b98857822b77ac7f95bdf367b70af5b78c","status":"affected","lessThan":"a95fc5f1c12bba1dbff72bd2611e7fad0758831b","versionType":"git"},{"version":"875386b98857822b77ac7f95bdf367b70af5b78c","status":"affected","lessThan":"c55d649a6cc246c3ccd5d118faea230c46b60f35","versionType":"git"},{"version":"875386b98857822b77ac7f95bdf367b70af5b78c","status":"affected","lessThan":"e46160a5d4fa59bf4d5f3412b6b5cb79edb967dd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_nvme.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","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_nvme.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/925a9129a514b7c3bc0a8af01e51868adbb9a83e"},{"url":"https://git.kernel.org/stable/c/cbbf1484496aac86038e67ac984949af58009d4b"},{"url":"https://git.kernel.org/stable/c/a95fc5f1c12bba1dbff72bd2611e7fad0758831b"},{"url":"https://git.kernel.org/stable/c/c55d649a6cc246c3ccd5d118faea230c46b60f35"},{"url":"https://git.kernel.org/stable/c/e46160a5d4fa59bf4d5f3412b6b5cb79edb967dd"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - Unsolicited FC-NVMe LS frames are posted as PT_LS4_UNSOL; qla24xx_msix_rsp_q() (or qla2xxx_msix_rsp_q → qla_do_work) runs qla24xx_process_response_queue() → qla2xxx_process_purls_iocb(), then DPC qla2xxx_process_purls_pkt() → nvme_fc_rcv_ls_req() and nvme_fc_xmt_ls_rsp() call qla_nvme_xmt_ls_rsp(). FC/FCoE is a non-routable SAN fabric, so Adjacent is the highest defensible vector.\nAC:L - qla_nvme_xmt_ls_rsp() kfree()s uctx on out: when qla2x00_get_sp(GFP_ATOMIC) fails, qla2x00_start_sp() fails after five -EAGAIN retries, or fcport->deleted is set. A peer floods CREATE_ASSOCIATION LS onto base_qpair or sends LS then LOGO so deleted is set before nvme_fc_handle_ls_rqst_work() calls xmt_ls_rsp; both sides are attacker-driven.\nPR:N - qla2xxx_process_purls_iocb() looks up the sender with qla2x00_find_fcport_by_nportid(incl_deleted=0) and handles PT_LS4_UNSOL in the MSI-X/DPC path with no Linux credential or capability check. FC-SP/EDIF is opt-in; being a logged-in NVMe N_Port is fabric membership, not a privilege on the victim host.\nUI:N - qla24xx_queue_purex_item() sets PROCESS_PUREX_IOCB; qla2xxx_process_purls_pkt() and the nvme_fc rport lsrcv_work then call qla_nvme_xmt_ls_rsp() with no victim mount, open, or administrator action.\nS:U - kfree() of uctx while it remains on fcport->unsol_ctx_head corrupts that per-fcport list and the host kernel heap inside the qla2xxx driver. Impact stays in the same kernel security authority; it is not a VM escape or IOMMU/DMA bypass.\nC:H - After qla_nvme_xmt_ls_rsp() kfree()s uctx, the next qla2xxx_process_purls_iocb() list_add_tail() and a later list_del() in qla_nvme_release_lsrsp_cmd_kref() or qla2xxx_process_purls_pkt() operate on the freed qla_nvme_unsol_ctx. That use-after-free of a kmalloc object enables disclosure of reused kernel heap.\nI:H - list_add_tail(&uctx->elem, &fcport->unsol_ctx_head) writes next/prev through the already-freed node, and list_del() of a neighbor stores those pointers into adjacent heap objects. Combined with attacker-driven uctx allocations of known size, that is a kernel write primitive usable for control-flow hijack.\nA:H - list_add_tail()/list_del() on the dangling uctx->elem oopses on LIST_POISON or panics on a corrupted next/prev, and the remote peer can repeat PT_LS4_UNSOL to hit the out: path again, taking down the host and its FC-NVMe storage path."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:53:03.891Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}