{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68454", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.395Z", "datePublished": "2026-08-13T13:59:57.209Z", "dateUpdated": "2026-08-13T22:45:21.178Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-13T22:45:21.178Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: pci: Fix handling of AIF enable without AISB\n\nWhen a guest seeks to register IRQs without a summary bit specified,\nensure that the associated GAITE then stores 0 for the guest AISB\nlocation instead of virt_to_phys(page_address(NULL))."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable code is reached through the KVM_S390_ZPCI_OP VM ioctl, issued by the userspace VMM on behalf of a guest executing the mpcifc \"register adapter interrupts\" instruction for an assigned zPCI device; no network path exists.\nAC:L - The guest simply registers adapter-event notification with no summary bit (sb == 0), which deterministically stores virt_to_phys(page_address(NULL)) into the GAITE; the subsequent wild access is then triggered at will by device interrupt activity or by deregistering/tearing down the VM.\nPR:L - The attacker needs access to a KVM VM file descriptor with an assigned zPCI device, i.e. control of a guest kernel or of the unprivileged QEMU process; no host root or init-namespace privilege is required.\nUI:N - The guest triggers the register/deregister sequence entirely on its own; no host administrator or other user action is needed.\nS:C - A guest action corrupts host kernel state outside the VM's security authority \u2014 the GAITE is host-owned and the resulting wild accesses occur in host kernel context, crossing the guest/hypervisor boundary.\nC:H - kvm_s390_pci_aif_disable() turns the bogus physical address into a struct page via phys_to_page() and reads folio metadata from it, an out-of-bounds vmemmap read; the resulting refcount underflow can free memory still in use, yielding a read primitive over host memory belonging to the hypervisor and other guests.\nI:H - aen_host_forward() performs set_bit_inv() on phys_to_virt(garbage) \u2014 an atomic OR write at a wild host kernel address \u2014 and unpin_user_page() decrements the refcount of a fabricated struct page, giving host memory corruption and a premature-free primitive usable for control-flow hijack.\nA:H - The wild atomic write in hard-IRQ context and the bogus struct page dereference reliably produce an addressing exception / kernel panic in the host, taking down the hypervisor and every guest on it."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/kvm/pci.c"], "versions": [{"version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "lessThan": "f887df91826e72b570c5e9298e66dd929f09edde", "status": "affected", "versionType": "git"}, {"version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "lessThan": "3ef3190e30601b2688bdc64169b938b8d7f42010", "status": "affected", "versionType": "git"}, {"version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "lessThan": "d48b9b096d11e31690c0a4988f65f21b64c01b2a", "status": "affected", "versionType": "git"}, {"version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "lessThan": "df72596278b0e22dac5ef2881e9221a3a2c4ed11", "status": "affected", "versionType": "git"}, {"version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "lessThan": "124a3769c43713a11a93a821b313e61ad5110cb8", "status": "affected", "versionType": "git"}, {"version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "lessThan": "3e3aa6da87d30a0064a17b836685cd43c90a3572", "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/pci.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc4", "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": "6.0", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2-rc4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f887df91826e72b570c5e9298e66dd929f09edde"}, {"url": "https://git.kernel.org/stable/c/3ef3190e30601b2688bdc64169b938b8d7f42010"}, {"url": "https://git.kernel.org/stable/c/d48b9b096d11e31690c0a4988f65f21b64c01b2a"}, {"url": "https://git.kernel.org/stable/c/df72596278b0e22dac5ef2881e9221a3a2c4ed11"}, {"url": "https://git.kernel.org/stable/c/124a3769c43713a11a93a821b313e61ad5110cb8"}, {"url": "https://git.kernel.org/stable/c/3e3aa6da87d30a0064a17b836685cd43c90a3572"}], "title": "KVM: s390: pci: Fix handling of AIF enable without AISB", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/s390/kvm/pci.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f887df91826e72b570c5e9298e66dd929f09edde", "status": "affected", "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "versionType": "git"}, {"lessThan": "3ef3190e30601b2688bdc64169b938b8d7f42010", "status": "affected", "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "versionType": "git"}, {"lessThan": "d48b9b096d11e31690c0a4988f65f21b64c01b2a", "status": "affected", "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "versionType": "git"}, {"lessThan": "df72596278b0e22dac5ef2881e9221a3a2c4ed11", "status": "affected", "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "versionType": "git"}, {"lessThan": "124a3769c43713a11a93a821b313e61ad5110cb8", "status": "affected", "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "versionType": "git"}, {"lessThan": "3e3aa6da87d30a0064a17b836685cd43c90a3572", "status": "affected", "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/s390/kvm/pci.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc4", "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: pci: Fix handling of AIF enable without AISB\n\nWhen a guest seeks to register IRQs without a summary bit specified,\nensure that the associated GAITE then stores 0 for the guest AISB\nlocation instead of virt_to_phys(page_address(NULL))."}], "id": "CVE-2026-68454", "lastModified": "2026-08-13T23:17:38.780", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-13T15:19:58.210", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/124a3769c43713a11a93a821b313e61ad5110cb8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3e3aa6da87d30a0064a17b836685cd43c90a3572"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3ef3190e30601b2688bdc64169b938b8d7f42010"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d48b9b096d11e31690c0a4988f65f21b64c01b2a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/df72596278b0e22dac5ef2881e9221a3a2c4ed11"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f887df91826e72b570c5e9298e66dd929f09edde"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: KVM: s390: pci: Fix handling of AIF enable without AISB", "id": "2515349", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2515349"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the KVM (Kernel-based Virtual Machine) subsystem of the Linux kernel, affecting the s390 PCI implementation. When a guest operating system registers interrupt requests (IRQs) without a specific summary bit, the system incorrectly stores an invalid memory address. This improper handling of memory addresses can lead to system instability, potentially resulting in a denial of service for the host system."], "name": "CVE-2026-68454", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68454\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68454\nhttps://lore.kernel.org/linux-cve-announce/2026081330-CVE-2026-68454-53ae@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc,f887df91826e72b570c5e9298e66dd929f09edde)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc,3ef3190e30601b2688bdc64169b938b8d7f42010)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc,d48b9b096d11e31690c0a4988f65f21b64c01b2a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc,df72596278b0e22dac5ef2881e9221a3a2c4ed11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc,124a3769c43713a11a93a821b313e61ad5110cb8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc,3e3aa6da87d30a0064a17b836685cd43c90a3572)"}}], "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": "semver", "value": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,8.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc4,*]"}}], "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": "2026-08-13T17:15:05.160671+00:00", "updated": "2026-08-14T01:30:04.453299+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}