{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64103","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T07:54:57.034Z","datePublished":"2026-07-19T15:40:07.372Z","dateUpdated":"2026-07-19T15:40:07.372Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-07-19T15:40:07.372Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: isci: Fix use-after-free in device removal path\n\nThe ISCI completion tasklet is initialized in isci_host_alloc()\n(drivers/scsi/isci/init.c:496) and scheduled from both MSI-X and legacy\ninterrupt handlers (drivers/scsi/isci/host.c:223,613).\n\nisci_host_deinit() stops the controller and waits for stop completion,\nbut it never kills completion_tasklet before teardown continues. A\ntop-of-function tasklet_kill() is not sufficient here: interrupts are\nonly disabled when isci_host_stop_complete() runs, so until\nwait_for_stop() returns the IRQ handlers can still requeue the\ntasklet. The tasklet callback also re-enables interrupts after draining\ncompletions, so killing the tasklet before the source is quiesced leaves\nthe same race open.\n\nOnce wait_for_stop() returns, no further IRQ-driven scheduling can\noccur. Kill completion_tasklet there so teardown cannot race a queued\ntasklet running on a dead ihost. On remove or unload, the stale callback\ncan otherwise dereference ihost and touch ihost->smu_registers after the\nhost lifetime ends.\n\nA UML + KASAN analogue reproduced the failure class both with no\ntasklet_kill() and with tasklet_kill() placed before source quiesce, and\nstayed clean once the kill happened after quiescing the scheduling\nsource.\n\nThis mirrors commit f6ab594672d4 (\"scsi: aic94xx: fix use-after-free in\ndevice removal path\"), but ISCI needs the kill after wait_for_stop()."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/isci/host.c"],"versions":[{"version":"6f231dda68080759f1aed3769896e94c73099f0f","lessThan":"1412995e10c74644b47f242aea6e4f3d4180e806","status":"affected","versionType":"git"},{"version":"6f231dda68080759f1aed3769896e94c73099f0f","lessThan":"a83d3e4daba40d49324cec1c51ed261e1ea48cf1","status":"affected","versionType":"git"},{"version":"6f231dda68080759f1aed3769896e94c73099f0f","lessThan":"ab2266601a875982f2d2033f41e070a6d5e615e2","status":"affected","versionType":"git"},{"version":"6f231dda68080759f1aed3769896e94c73099f0f","lessThan":"309c6058622d080fe8c2fab87c30da82d834d989","status":"affected","versionType":"git"},{"version":"6f231dda68080759f1aed3769896e94c73099f0f","lessThan":"cb9e72c50e6c81a5903f27e0b397ce8525d7539b","status":"affected","versionType":"git"},{"version":"6f231dda68080759f1aed3769896e94c73099f0f","lessThan":"b9ff8631006233ba246828ac70409d2cb2da38d3","status":"affected","versionType":"git"},{"version":"6f231dda68080759f1aed3769896e94c73099f0f","lessThan":"6d40f2f103bb30f52f3dbadbe2c3fdf274a9763c","status":"affected","versionType":"git"},{"version":"6f231dda68080759f1aed3769896e94c73099f0f","lessThan":"b52a8d52c3125ec9a93106ed816582368de34426","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/isci/host.c"],"versions":[{"version":"3.0","status":"affected"},{"version":"0","lessThan":"3.0","status":"unaffected","versionType":"semver"},{"version":"5.10.258","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.209","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.142","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.92","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.34","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.11","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"6.6.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"6.12.92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"6.18.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/1412995e10c74644b47f242aea6e4f3d4180e806"},{"url":"https://git.kernel.org/stable/c/a83d3e4daba40d49324cec1c51ed261e1ea48cf1"},{"url":"https://git.kernel.org/stable/c/ab2266601a875982f2d2033f41e070a6d5e615e2"},{"url":"https://git.kernel.org/stable/c/309c6058622d080fe8c2fab87c30da82d834d989"},{"url":"https://git.kernel.org/stable/c/cb9e72c50e6c81a5903f27e0b397ce8525d7539b"},{"url":"https://git.kernel.org/stable/c/b9ff8631006233ba246828ac70409d2cb2da38d3"},{"url":"https://git.kernel.org/stable/c/6d40f2f103bb30f52f3dbadbe2c3fdf274a9763c"},{"url":"https://git.kernel.org/stable/c/b52a8d52c3125ec9a93106ed816582368de34426"}],"title":"scsi: isci: Fix use-after-free in device removal path","x_generator":{"engine":"bippy-1.2.0"}}}}