{"id":"CVE-2026-89847","state":"PUBLISHED","title":"scsi: qla2xxx: Avoid double completion in async IOCB timeout","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Avoid double completion in async IOCB timeout\n\nqla2x00_async_iocb_timeout() tries to abort a timed-out async IOCB. When\nqla24xx_async_abort_cmd() fails, both the SRB_LOGIN_CMD path and the\nSRB_CTRL_VP/default path scan outstanding_cmds[] for the SRB and then\ncall sp->done(sp, QLA_FUNCTION_TIMEOUT) unconditionally, without checking\nwhether the SRB was actually found and removed.\n\nIf the response ISR completes the same handle first, it removes the SRB\nunder qp_lock_ptr and runs sp->done() -> complete(sp->comp). The\nsubmitter qla24xx_control_vp() wakes from wait_for_completion(), clears\nsp->comp, drops its reference and returns, reclaiming the on-stack\ncompletion. The timer reference keeps the SRB alive across the timeout\nhandler, but not the submitter's stack. The timeout then issues a second\nsp->done() -> qla_ctrlvp_sp_done(), which evaluates \"if (sp->comp)\ncomplete(sp->comp)\"; with the pointer loaded before the submitter's NULL\nstore, complete() writes into the freed stack frame, a use-after-free.\n\nTrack whether this path removed the SRB from outstanding_cmds and only\ncall sp->done() when it did, so the command is completed exactly once by\nwhichever path owns it. This mirrors the sp_found guard already used in\nqla24xx_abort_iocb_timeout().","publishedAt":"2026-09-16T10:31:21.286Z","updatedAt":"2026-10-19T08:53:40.165Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/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":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"71a7b6e3c7f121439f51a058e53d4a8e05b63dec","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"7257b5e1fb6c9387714f66e01b79ec82b717eede","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"f5b660e0b0d9190d8853c795c2522cc5f8c93003","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"6e217a9482eabbd8b29847be334c74cf468d3544","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"d6d856c722f40f0694ff755208552e658db6dd42","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"9fa1d71233a82416492d9c9de9756ebe140fe714","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"845d4abd92cd2f97551356c8b281ad6e197acb07","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_init.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","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_init.c"]}],"references":["https://git.kernel.org/stable/c/71a7b6e3c7f121439f51a058e53d4a8e05b63dec","https://git.kernel.org/stable/c/7257b5e1fb6c9387714f66e01b79ec82b717eede","https://git.kernel.org/stable/c/f5b660e0b0d9190d8853c795c2522cc5f8c93003","https://git.kernel.org/stable/c/6e217a9482eabbd8b29847be334c74cf468d3544","https://git.kernel.org/stable/c/d6d856c722f40f0694ff755208552e658db6dd42","https://git.kernel.org/stable/c/9fa1d71233a82416492d9c9de9756ebe140fe714","https://git.kernel.org/stable/c/845d4abd92cd2f97551356c8b281ad6e197acb07","https://git.kernel.org/stable/c/bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89847.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89847","state":"PUBLISHED","datePublished":"2026-09-16T10:31:21.286Z","dateUpdated":"2026-10-19T08:53:40.165Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.770Z"},"containers":{"cna":{"title":"scsi: qla2xxx: Avoid double completion in async IOCB timeout","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Avoid double completion in async IOCB timeout\n\nqla2x00_async_iocb_timeout() tries to abort a timed-out async IOCB. When\nqla24xx_async_abort_cmd() fails, both the SRB_LOGIN_CMD path and the\nSRB_CTRL_VP/default path scan outstanding_cmds[] for the SRB and then\ncall sp->done(sp, QLA_FUNCTION_TIMEOUT) unconditionally, without checking\nwhether the SRB was actually found and removed.\n\nIf the response ISR completes the same handle first, it removes the SRB\nunder qp_lock_ptr and runs sp->done() -> complete(sp->comp). The\nsubmitter qla24xx_control_vp() wakes from wait_for_completion(), clears\nsp->comp, drops its reference and returns, reclaiming the on-stack\ncompletion. The timer reference keeps the SRB alive across the timeout\nhandler, but not the submitter's stack. The timeout then issues a second\nsp->done() -> qla_ctrlvp_sp_done(), which evaluates \"if (sp->comp)\ncomplete(sp->comp)\"; with the pointer loaded before the submitter's NULL\nstore, complete() writes into the freed stack frame, a use-after-free.\n\nTrack whether this path removed the SRB from outstanding_cmds and only\ncall sp->done() when it did, so the command is completed exactly once by\nwhichever path owns it. This mirrors the sp_found guard already used in\nqla24xx_abort_iocb_timeout()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"71a7b6e3c7f121439f51a058e53d4a8e05b63dec","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"7257b5e1fb6c9387714f66e01b79ec82b717eede","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"f5b660e0b0d9190d8853c795c2522cc5f8c93003","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"6e217a9482eabbd8b29847be334c74cf468d3544","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"d6d856c722f40f0694ff755208552e658db6dd42","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"9fa1d71233a82416492d9c9de9756ebe140fe714","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"845d4abd92cd2f97551356c8b281ad6e197acb07","versionType":"git"},{"version":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a","status":"affected","lessThan":"bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/qla2xxx/qla_init.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.19","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","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_init.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/71a7b6e3c7f121439f51a058e53d4a8e05b63dec"},{"url":"https://git.kernel.org/stable/c/7257b5e1fb6c9387714f66e01b79ec82b717eede"},{"url":"https://git.kernel.org/stable/c/f5b660e0b0d9190d8853c795c2522cc5f8c93003"},{"url":"https://git.kernel.org/stable/c/6e217a9482eabbd8b29847be334c74cf468d3544"},{"url":"https://git.kernel.org/stable/c/d6d856c722f40f0694ff755208552e658db6dd42"},{"url":"https://git.kernel.org/stable/c/9fa1d71233a82416492d9c9de9756ebe140fe714"},{"url":"https://git.kernel.org/stable/c/845d4abd92cd2f97551356c8b281ad6e197acb07"},{"url":"https://git.kernel.org/stable/c/bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"},"scenarios":[{"lang":"en","value":"AV:N - qla2x00_async_iocb_timeout() runs on fabric login, CT/SNS, and target-mode NACK IOCBs; a remote FC/FCoE/FCIP peer delays then completes those exchanges so the response ISR races the timer. That is a SAN-network path, consistent with other qla2xxx FC-peer memory-corruption scores.\nAC:L - The peer controls both sides of the race by withholding the login/CT/NACK completion until the async timer fires, then posting it so the ISR removes the SRB while timeout still calls sp->done(). Abort failure is also attacker-driven via GFP_ATOMIC SRB exhaustion or ISP-abort from injected link errors.\nPR:N - Fabric login, name-server CT, and target-mode notify-ack run in driver ISR/DPC context with no Linux credential or capability check. FC-SP/EDIF is opt-in and rare, so a fabric peer needs no account on the victim host.\nUI:N - Discovery, PLOGI, and NACK IOCBs are posted automatically on link-up, RSCN, and inbound ELS. The async timer and response ISR then run without any victim mount, open, or administrator action.\nS:U - Double completion corrupts host-kernel SRB and completion state inside the qla2xxx driver. The impact stays in that kernel authority and is not a VM escape, IOMMU bypass, or other cross-boundary breakout.\nC:H - The extra sp->done() drops the SRB INIT kref twice so the timeout path later frees a mempool SRB still in use, a use-after-free that can disclose reused heap contents. The CTRL_VP path also complete()s a reclaimed on-stack completion.\nI:H - The same mempool SRB use-after-free and complete() write into a freed stack frame are kernel write primitives. Reuse of the freed SRB can hijack control flow rather than producing only a clean timeout.\nA:H - Double completion of a live SRB is a use-after-free that oopses or panics the host, as in the original switch-CT crash in qla2x00_chk_ms_status from the response ISR, taking down storage on the adapter."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:53:40.165Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}