CVE-2026-89921

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89921", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.775Z", "datePublished": "2026-09-16T10:32:15.413Z", "dateUpdated": "2026-10-30T12:33:27.039Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:33:27.039Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Zero initialize data structures for inject_pfault_token\n\n__kvm_inject_pfault_token() only sets .type and .u.ext.ext_params2 of\nthe on-stack struct kvm_s390_irq but the full ext substructure is copied\ninto the cpu local variable on inject. ext_params and pad contain stale\nstack values.\n\nInterrupt delivery only uses ext_params2, so nothing leaks to the guest,\nbut a host user can use the migration ioctls to get to the data.\n\nFix by zero-initializing the irq struct.\nDo the same for the inti data structure."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/kvm/kvm-s390.c"], "versions": [{"version": "383d0b050106abecb82f43101cac94fa423af5cd", "lessThan": "3da26db3323cbccf509005fdbc4ebae842d323cd", "status": "affected", "versionType": "git"}, {"version": "383d0b050106abecb82f43101cac94fa423af5cd", "lessThan": "5b0ae4443383fbacd905522f0c95ad6c85a3b43e", "status": "affected", "versionType": "git"}, {"version": "383d0b050106abecb82f43101cac94fa423af5cd", "lessThan": "7090818ba774d254eba80979c2d4da23d91de02f", "status": "affected", "versionType": "git"}, {"version": "383d0b050106abecb82f43101cac94fa423af5cd", "lessThan": "ab1a8a3c9971200938093370da4c67d4427c25f2", "status": "affected", "versionType": "git"}, {"version": "383d0b050106abecb82f43101cac94fa423af5cd", "lessThan": "b8abc760fa18a389319d977834a30550b3ec18e8", "status": "affected", "versionType": "git"}, {"version": "383d0b050106abecb82f43101cac94fa423af5cd", "lessThan": "9b046de62b8098af6e2ba820b125ec9dc5f162c8", "status": "affected", "versionType": "git"}, {"version": "383d0b050106abecb82f43101cac94fa423af5cd", "lessThan": "134f235e0e8de54611a72d3cc3f63e5f31246baa", "status": "affected", "versionType": "git"}, {"version": "383d0b050106abecb82f43101cac94fa423af5cd", "lessThan": "4e2c7f7cbc27418f9a290399b986c1b85ff93b90", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/kvm/kvm-s390.c"], "versions": [{"version": "3.19", "status": "affected"}, {"version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "3.19", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3da26db3323cbccf509005fdbc4ebae842d323cd"}, {"url": "https://git.kernel.org/stable/c/5b0ae4443383fbacd905522f0c95ad6c85a3b43e"}, {"url": "https://git.kernel.org/stable/c/7090818ba774d254eba80979c2d4da23d91de02f"}, {"url": "https://git.kernel.org/stable/c/ab1a8a3c9971200938093370da4c67d4427c25f2"}, {"url": "https://git.kernel.org/stable/c/b8abc760fa18a389319d977834a30550b3ec18e8"}, {"url": "https://git.kernel.org/stable/c/9b046de62b8098af6e2ba820b125ec9dc5f162c8"}, {"url": "https://git.kernel.org/stable/c/134f235e0e8de54611a72d3cc3f63e5f31246baa"}, {"url": "https://git.kernel.org/stable/c/4e2c7f7cbc27418f9a290399b986c1b85ff93b90"}], "title": "KVM: s390: Zero initialize data structures for inject_pfault_token", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/s390/kvm/kvm-s390.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3da26db3323cbccf509005fdbc4ebae842d323cd", "status": "affected", "version": "383d0b050106abecb82f43101cac94fa423af5cd", "versionType": "git"}, {"lessThan": "5b0ae4443383fbacd905522f0c95ad6c85a3b43e", "status": "affected", "version": "383d0b050106abecb82f43101cac94fa423af5cd", "versionType": "git"}, {"lessThan": "7090818ba774d254eba80979c2d4da23d91de02f", "status": "affected", "version": "383d0b050106abecb82f43101cac94fa423af5cd", "versionType": "git"}, {"lessThan": "ab1a8a3c9971200938093370da4c67d4427c25f2", "status": "affected", "version": "383d0b050106abecb82f43101cac94fa423af5cd", "versionType": "git"}, {"lessThan": "b8abc760fa18a389319d977834a30550b3ec18e8", "status": "affected", "version": "383d0b050106abecb82f43101cac94fa423af5cd", "versionType": "git"}, {"lessThan": "9b046de62b8098af6e2ba820b125ec9dc5f162c8", "status": "affected", "version": "383d0b050106abecb82f43101cac94fa423af5cd", "versionType": "git"}, {"lessThan": "134f235e0e8de54611a72d3cc3f63e5f31246baa", "status": "affected", "version": "383d0b050106abecb82f43101cac94fa423af5cd", "versionType": "git"}, {"lessThan": "4e2c7f7cbc27418f9a290399b986c1b85ff93b90", "status": "affected", "version": "383d0b050106abecb82f43101cac94fa423af5cd", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/s390/kvm/kvm-s390.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.19"}, {"lessThan": "3.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Zero initialize data structures for inject_pfault_token\n\n__kvm_inject_pfault_token() only sets .type and .u.ext.ext_params2 of\nthe on-stack struct kvm_s390_irq but the full ext substructure is copied\ninto the cpu local variable on inject. ext_params and pad contain stale\nstack values.\n\nInterrupt delivery only uses ext_params2, so nothing leaks to the guest,\nbut a host user can use the migration ioctls to get to the data.\n\nFix by zero-initializing the irq struct.\nDo the same for the inti data structure."}], "id": "CVE-2026-89921", "lastModified": "2026-10-30T13:20:35.837", "metrics": {}, "published": "2026-09-16T11:17:01.173", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/134f235e0e8de54611a72d3cc3f63e5f31246baa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3da26db3323cbccf509005fdbc4ebae842d323cd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4e2c7f7cbc27418f9a290399b986c1b85ff93b90"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5b0ae4443383fbacd905522f0c95ad6c85a3b43e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7090818ba774d254eba80979c2d4da23d91de02f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9b046de62b8098af6e2ba820b125ec9dc5f162c8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ab1a8a3c9971200938093370da4c67d4427c25f2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b8abc760fa18a389319d977834a30550b3ec18e8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[383d0b050106abecb82f43101cac94fa423af5cd,9b046de62b8098af6e2ba820b125ec9dc5f162c8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[383d0b050106abecb82f43101cac94fa423af5cd,134f235e0e8de54611a72d3cc3f63e5f31246baa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[383d0b050106abecb82f43101cac94fa423af5cd,4e2c7f7cbc27418f9a290399b986c1b85ff93b90)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,3.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-17T10:00:11.589285+00:00", "updated": "2026-09-18T08:00:06.774129+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}