{"id":"CVE-2021-46963","state":"PUBLISHED","title":"scsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()\n\n    RIP: 0010:kmem_cache_free+0xfa/0x1b0\n    Call Trace:\n       qla2xxx_mqueuecommand+0x2b5/0x2c0 [qla2xxx]\n       scsi_queue_rq+0x5e2/0xa40\n       __blk_mq_try_issue_directly+0x128/0x1d0\n       blk_mq_request_issue_directly+0x4e/0xb0\n\nFix incorrect call to free srb in qla2xxx_mqueuecommand(), as srb is now\nallocated by upper layers. This fixes smatch warning of srb unintended\nfree.","publishedAt":"2024-02-27T18:47:01.783Z","updatedAt":"2026-08-05T08:45:15.980Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/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":"64a8c5018a4b21b04a756a56c495ef47c14e92d9","status":"affected","lessThan":"c5ab9b67d8b061de74e2ca51bf787ee599bd7f89","versionType":"git"},{"version":"dea6ee7173039d489977c9ed92e3749154615db4","status":"affected","lessThan":"77509a238547863040a42d57c72403f7d4c89a8f","versionType":"git"},{"version":"af2a0c51b1205327f55a7e82e530403ae1d42cbb","status":"affected","lessThan":"702cdaa2c6283c135ef16d52e0e4e3c1005aa538","versionType":"git"},{"version":"af2a0c51b1205327f55a7e82e530403ae1d42cbb","status":"affected","lessThan":"80ef24175df2cba3860d0369d1c662b49ee2de56","versionType":"git"},{"version":"af2a0c51b1205327f55a7e82e530403ae1d42cbb","status":"affected","lessThan":"a73208e3244127ef9f2cdf24e4adb947aaa32053","versionType":"git"},{"version":"af2a0c51b1205327f55a7e82e530403ae1d42cbb","status":"affected","lessThan":"6641df81ab799f28a5d564f860233dd26cca0d93","versionType":"git"},{"version":"4a1cc2f71bc57cf8dee6f58e7d2355a43aabb312","status":"affected","versionType":"git"},{"version":"4.19.90","status":"affected","lessThan":"4.19.191","versionType":"semver"},{"version":"5.4.4","status":"affected","lessThan":"5.4.118","versionType":"semver"},{"version":"5.3.17","status":"affected","lessThan":"5.4","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_os.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"4.19.191","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.118","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.36","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.11.20","status":"unaffected","lessThanOrEqual":"5.11.*","versionType":"semver"},{"version":"5.12.3","status":"unaffected","lessThanOrEqual":"5.12.*","versionType":"semver"},{"version":"5.13","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_os.c"]}],"references":["https://git.kernel.org/stable/c/c5ab9b67d8b061de74e2ca51bf787ee599bd7f89","https://git.kernel.org/stable/c/77509a238547863040a42d57c72403f7d4c89a8f","https://git.kernel.org/stable/c/702cdaa2c6283c135ef16d52e0e4e3c1005aa538","https://git.kernel.org/stable/c/80ef24175df2cba3860d0369d1c662b49ee2de56","https://git.kernel.org/stable/c/a73208e3244127ef9f2cdf24e4adb947aaa32053","https://git.kernel.org/stable/c/6641df81ab799f28a5d564f860233dd26cca0d93"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:16.371Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/46xxx/CVE-2021-46963.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-46963","state":"PUBLISHED","datePublished":"2024-02-27T18:47:01.783Z","dateUpdated":"2026-08-05T08:45:15.980Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-27T18:42:55.942Z"},"containers":{"cna":{"title":"scsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()\n\n    RIP: 0010:kmem_cache_free+0xfa/0x1b0\n    Call Trace:\n       qla2xxx_mqueuecommand+0x2b5/0x2c0 [qla2xxx]\n       scsi_queue_rq+0x5e2/0xa40\n       __blk_mq_try_issue_directly+0x128/0x1d0\n       blk_mq_request_issue_directly+0x4e/0xb0\n\nFix incorrect call to free srb in qla2xxx_mqueuecommand(), as srb is now\nallocated by upper layers. This fixes smatch warning of srb unintended\nfree."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"64a8c5018a4b21b04a756a56c495ef47c14e92d9","status":"affected","lessThan":"c5ab9b67d8b061de74e2ca51bf787ee599bd7f89","versionType":"git"},{"version":"dea6ee7173039d489977c9ed92e3749154615db4","status":"affected","lessThan":"77509a238547863040a42d57c72403f7d4c89a8f","versionType":"git"},{"version":"af2a0c51b1205327f55a7e82e530403ae1d42cbb","status":"affected","lessThan":"702cdaa2c6283c135ef16d52e0e4e3c1005aa538","versionType":"git"},{"version":"af2a0c51b1205327f55a7e82e530403ae1d42cbb","status":"affected","lessThan":"80ef24175df2cba3860d0369d1c662b49ee2de56","versionType":"git"},{"version":"af2a0c51b1205327f55a7e82e530403ae1d42cbb","status":"affected","lessThan":"a73208e3244127ef9f2cdf24e4adb947aaa32053","versionType":"git"},{"version":"af2a0c51b1205327f55a7e82e530403ae1d42cbb","status":"affected","lessThan":"6641df81ab799f28a5d564f860233dd26cca0d93","versionType":"git"},{"version":"4a1cc2f71bc57cf8dee6f58e7d2355a43aabb312","status":"affected","versionType":"git"},{"version":"4.19.90","status":"affected","lessThan":"4.19.191","versionType":"semver"},{"version":"5.4.4","status":"affected","lessThan":"5.4.118","versionType":"semver"},{"version":"5.3.17","status":"affected","lessThan":"5.4","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_os.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"4.19.191","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.118","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.36","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.11.20","status":"unaffected","lessThanOrEqual":"5.11.*","versionType":"semver"},{"version":"5.12.3","status":"unaffected","lessThanOrEqual":"5.12.*","versionType":"semver"},{"version":"5.13","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_os.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c5ab9b67d8b061de74e2ca51bf787ee599bd7f89"},{"url":"https://git.kernel.org/stable/c/77509a238547863040a42d57c72403f7d4c89a8f"},{"url":"https://git.kernel.org/stable/c/702cdaa2c6283c135ef16d52e0e4e3c1005aa538"},{"url":"https://git.kernel.org/stable/c/80ef24175df2cba3860d0369d1c662b49ee2de56"},{"url":"https://git.kernel.org/stable/c/a73208e3244127ef9f2cdf24e4adb947aaa32053"},{"url":"https://git.kernel.org/stable/c/6641df81ab799f28a5d564f860233dd26cca0d93"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerable path is qla2xxx_queuecommand → qla2xxx_mqueuecommand on outbound initiator I/O through the SCSI/block stack, reachable by local reads/writes to qla2xxx-backed devices or filesystems, not by processing remote Fibre Channel or network packets.\nAC:L - Once a qpair is offline (PCI EEH/FLR/reset recovery, a normal operational state on QLogic FC HBAs) or DIF I/O hits an unsupported qpair, any subsequent SCSI command deterministically takes the QLA_INTERFACE_ERROR path and performs the incorrect free with no race or layout dependency.\nPR:L - Any unprivileged local user who can issue I/O to a mounted filesystem or block device backed by a qla2xxx HBA reaches queuecommand; no capabilities or init-namespace root are required.\nUI:N - The attacker triggers the bug by performing their own I/O against already-attached qla2xxx storage; no separate victim mount, open, or confirmation is required.\nS:U - Impact is confined to the host kernel privilege domain (crash or heap corruption via the SRB mempool); there is no VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:H - When the SRB mempool is below min_nr (common with outstanding async fabric SRBs), mempool_free stores the embedded scsi_cmd_priv pointer; after scsi_done recycles the command this becomes a use-after-free that enables arbitrary kernel memory disclosure via heap reuse.\nI:H - The same mempool-poisoning UAF returns a dangling/aliased srb_t to later qla2xxx_get_qpair_sp callers for fabric/IOCB work, yielding heap corruption and control-flow hijack primitives suitable for privilege escalation.\nA:H - The reported failure is a kernel crash in kmem_cache_free from qla2xxx_mqueuecommand when the full mempool path frees the non-slab embedded SRB, which is full host availability impact."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T08:45:15.980Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.90","versionEndExcluding":"4.19.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.4","versionEndExcluding":"5.4.118"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.11.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.12.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-46963","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-02-27T20:13:28.391773Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-07-05T17:22:03.103Z"}},{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/c5ab9b67d8b061de74e2ca51bf787ee599bd7f89","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/77509a238547863040a42d57c72403f7d4c89a8f","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/702cdaa2c6283c135ef16d52e0e4e3c1005aa538","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/80ef24175df2cba3860d0369d1c662b49ee2de56","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/a73208e3244127ef9f2cdf24e4adb947aaa32053","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/6641df81ab799f28a5d564f860233dd26cca0d93","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T05:17:42.900Z"}}]}}}