{"id":"CVE-2026-74754","state":"PUBLISHED","title":"scsi: core: pair EH runtime PM get and put","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: core: pair EH runtime PM get and put\n\nshost->eh_noresume is currently consulted twice in one error handling\niteration: once before scsi_autopm_get_host() and once again before\nscsi_autopm_put_host().\n\nThat is racy when a PM-triggered error path flips shost->eh_noresume\nwhile the SCSI EH thread is still running.\n\nThe problem flow looks like this:\nPM path\n  ufshcd_set_dev_pwr_mode()\n    shost->eh_noresume = 1\n    ufshcd_execute_start_stop  <-- trigger EH\n    ...\n    shost->eh_noresume = 0\n\nEH path\n  scsi_error_handler()\n    if (!shost->eh_noresume)\n      scsi_autopm_get_host()  <-- skipped\n    ...\n    if (!shost->eh_noresume)\n       scsi_autopm_put_host()  <-- executed later\n\nIn that case one EH iteration can skip autoresume on entry and still\ndrop a runtime PM reference on exit. That leaves an unmatched runtime PM\nput and can trigger a runtime PM usage count underflow.\n\nFix this by making eh_noresume a regular bool so it can be accessed with\nREAD_ONCE() and WRITE_ONCE(). Snapshot it once per EH iteration and use\nthat snapshot for both runtime PM get and put decisions.","publishedAt":"2026-08-26T14:37:00.766Z","updatedAt":"2026-10-30T12:30:32.806Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"9aca00c74730f4bc12d0717d33db637a16ccdfea","versionType":"git"},{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"1ec5f6aa38ea990af37c49af7a4bb3db00da7f9d","versionType":"git"},{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"0038a2a75a15d163f428c93103c6d02d4d231a7a","versionType":"git"},{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"fdc93f4a801077efbf1b87570ade8d8f325de62f","versionType":"git"},{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"e83eed1bea142c8fe852fd53156845b88252ecd8","versionType":"git"},{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"872f486259ae0bc6b73ca4735a15d013241f73e9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/scsi_error.c","drivers/ufs/core/ufshcd.c","include/scsi/scsi_host.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.3","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":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.10","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/scsi_error.c","drivers/ufs/core/ufshcd.c","include/scsi/scsi_host.h"]}],"references":["https://git.kernel.org/stable/c/9aca00c74730f4bc12d0717d33db637a16ccdfea","https://git.kernel.org/stable/c/1ec5f6aa38ea990af37c49af7a4bb3db00da7f9d","https://git.kernel.org/stable/c/0038a2a75a15d163f428c93103c6d02d4d231a7a","https://git.kernel.org/stable/c/fdc93f4a801077efbf1b87570ade8d8f325de62f","https://git.kernel.org/stable/c/e83eed1bea142c8fe852fd53156845b88252ecd8","https://git.kernel.org/stable/c/872f486259ae0bc6b73ca4735a15d013241f73e9"],"weaknesses":[],"ingestedAt":"2026-10-30T12:48:04.825Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74754.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74754","state":"PUBLISHED","datePublished":"2026-08-26T14:37:00.766Z","dateUpdated":"2026-10-30T12:30:32.806Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.931Z"},"containers":{"cna":{"title":"scsi: core: pair EH runtime PM get and put","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: core: pair EH runtime PM get and put\n\nshost->eh_noresume is currently consulted twice in one error handling\niteration: once before scsi_autopm_get_host() and once again before\nscsi_autopm_put_host().\n\nThat is racy when a PM-triggered error path flips shost->eh_noresume\nwhile the SCSI EH thread is still running.\n\nThe problem flow looks like this:\nPM path\n  ufshcd_set_dev_pwr_mode()\n    shost->eh_noresume = 1\n    ufshcd_execute_start_stop  <-- trigger EH\n    ...\n    shost->eh_noresume = 0\n\nEH path\n  scsi_error_handler()\n    if (!shost->eh_noresume)\n      scsi_autopm_get_host()  <-- skipped\n    ...\n    if (!shost->eh_noresume)\n       scsi_autopm_put_host()  <-- executed later\n\nIn that case one EH iteration can skip autoresume on entry and still\ndrop a runtime PM reference on exit. That leaves an unmatched runtime PM\nput and can trigger a runtime PM usage count underflow.\n\nFix this by making eh_noresume a regular bool so it can be accessed with\nREAD_ONCE() and WRITE_ONCE(). Snapshot it once per EH iteration and use\nthat snapshot for both runtime PM get and put decisions."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"9aca00c74730f4bc12d0717d33db637a16ccdfea","versionType":"git"},{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"1ec5f6aa38ea990af37c49af7a4bb3db00da7f9d","versionType":"git"},{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"0038a2a75a15d163f428c93103c6d02d4d231a7a","versionType":"git"},{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"fdc93f4a801077efbf1b87570ade8d8f325de62f","versionType":"git"},{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"e83eed1bea142c8fe852fd53156845b88252ecd8","versionType":"git"},{"version":"ae0751ffc77e7f21629970fdab5528c573e637f8","status":"affected","lessThan":"872f486259ae0bc6b73ca4735a15d013241f73e9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/scsi_error.c","drivers/ufs/core/ufshcd.c","include/scsi/scsi_host.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.3","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":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.10","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/scsi_error.c","drivers/ufs/core/ufshcd.c","include/scsi/scsi_host.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/9aca00c74730f4bc12d0717d33db637a16ccdfea"},{"url":"https://git.kernel.org/stable/c/1ec5f6aa38ea990af37c49af7a4bb3db00da7f9d"},{"url":"https://git.kernel.org/stable/c/0038a2a75a15d163f428c93103c6d02d4d231a7a"},{"url":"https://git.kernel.org/stable/c/fdc93f4a801077efbf1b87570ade8d8f325de62f"},{"url":"https://git.kernel.org/stable/c/e83eed1bea142c8fe852fd53156845b88252ecd8"},{"url":"https://git.kernel.org/stable/c/872f486259ae0bc6b73ca4735a15d013241f73e9"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:30:32.806Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"7.1.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}