CVE-2026-93260

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93260", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.097Z", "datePublished": "2026-09-24T15:51:46.703Z", "dateUpdated": "2026-10-30T12:36:35.383Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:36:35.383Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/xive: propagate IPI init errors to prevent use-after-free\n\nWhen xive_init_ipis() fails (e.g. irq_domain_alloc_irqs() fails),\nthe error path frees the global xive_ipis array. However,\nxive_smp_probe() previously ignored this failure and proceeded to\ncall xive_setup_cpu_ipi(), which dereferences the already-freed\nxive_ipis pointer -- a use-after-free.\n\nNow that xive_smp_probe() returns int (previous patch), propagate\nthe error from xive_init_ipis() and xive_setup_cpu_ipi() through\nxive_smp_probe(). Check the return value in both pnv_smp_probe()\nand pSeries_smp_probe() so that IPI setup is aborted cleanly on\nfailure, avoiding the use-after-free."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.4, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The UAF is in xive_setup_cpu_ipi() after xive_init_ipis() kfree's xive_ipis, reached only from kernel_init_freeable()->smp_prepare_cpus()->pnv_smp_probe()/pSeries_smp_probe()->xive_smp_probe(); no protocol message or received packet supplies the trigger.\nAC:H - The free-then-use fires only when irq_domain_alloc_irqs() fails in xive_init_ipis()'s for_each_node loop (irq_desc ENOMEM/ENOSPC), after which kfree(xive_ipis) runs; that allocator failure during early SMP probe cannot be induced on demand.\nPR:N - xive_smp_probe() runs as swapper/0 from smp_prepare_cpus() in kernel_init_freeable() before userspace, with no capable() or credential check on pnv_smp_probe() or pSeries_smp_probe().\nUI:N - SMP IPI probe is invoked unconditionally by smp_prepare_cpus() during ordinary boot once xive_core_init() has set __xive_enabled; no victim mount, file open, or other interactive step is required.\nS:U - The dangling xive_ipis dereference corrupts heap in the same Linux instance that runs XIVE (PowerNV host or pSeries guest); it is not a KVM/Xen guest-to-host escape or an IOMMU/DMA boundary bypass.\nC:H - After kfree(xive_ipis) without NULLing, xive_ipi_cpu_to_irq() and xive_request_ipi() read xid->irq and xid->name from the freed xive_ipi_desc array; that heap use-after-free can disclose whatever reclaimed the slab.\nI:H - xive_request_ipi() then atomic_inc_return(&xid->started) on the freed descriptor and request_irq(xid->irq, xive_muxed_ipi_action) using the UAF-read virq, a write-after-free of the xive_ipi_desc slab that can corrupt a reused object and install a handler on the wrong irq.\nA:H - Dereferencing the kfree'd xive_ipis pointer in xive_setup_cpu_ipi() during xive_smp_probe() oopses or panics the kernel while bringing up SMP, so the machine fails to boot."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/powerpc/platforms/powernv/smp.c", "arch/powerpc/platforms/pseries/smp.c", "arch/powerpc/sysdev/xive/common.c"], "versions": [{"version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "lessThan": "89e1caa5b0aafe23e9938d9a311e9d41baee583e", "status": "affected", "versionType": "git"}, {"version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "lessThan": "e36b1c2eafcaaddefa70d55e6fda74cf6cda38af", "status": "affected", "versionType": "git"}, {"version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "lessThan": "2ea6238343691309e68308131c7e80c3ae05afea", "status": "affected", "versionType": "git"}, {"version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "lessThan": "5c9ab0c9cede9f149733d330e2d7d45341b71359", "status": "affected", "versionType": "git"}, {"version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "lessThan": "c554a8d376d5aea1b237ed6bef6f9fbfc550e67f", "status": "affected", "versionType": "git"}, {"version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "lessThan": "411a3c016e7a95f5fa105a0587e07d0647a77727", "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/powerpc/platforms/powernv/smp.c", "arch/powerpc/platforms/pseries/smp.c", "arch/powerpc/sysdev/xive/common.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "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": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "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": "4.12", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/89e1caa5b0aafe23e9938d9a311e9d41baee583e"}, {"url": "https://git.kernel.org/stable/c/e36b1c2eafcaaddefa70d55e6fda74cf6cda38af"}, {"url": "https://git.kernel.org/stable/c/2ea6238343691309e68308131c7e80c3ae05afea"}, {"url": "https://git.kernel.org/stable/c/5c9ab0c9cede9f149733d330e2d7d45341b71359"}, {"url": "https://git.kernel.org/stable/c/c554a8d376d5aea1b237ed6bef6f9fbfc550e67f"}, {"url": "https://git.kernel.org/stable/c/411a3c016e7a95f5fa105a0587e07d0647a77727"}], "title": "powerpc/xive: propagate IPI init errors to prevent use-after-free", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/powerpc/platforms/powernv/smp.c", "arch/powerpc/platforms/pseries/smp.c", "arch/powerpc/sysdev/xive/common.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "89e1caa5b0aafe23e9938d9a311e9d41baee583e", "status": "affected", "version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "versionType": "git"}, {"lessThan": "e36b1c2eafcaaddefa70d55e6fda74cf6cda38af", "status": "affected", "version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "versionType": "git"}, {"lessThan": "2ea6238343691309e68308131c7e80c3ae05afea", "status": "affected", "version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "versionType": "git"}, {"lessThan": "5c9ab0c9cede9f149733d330e2d7d45341b71359", "status": "affected", "version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "versionType": "git"}, {"lessThan": "c554a8d376d5aea1b237ed6bef6f9fbfc550e67f", "status": "affected", "version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "versionType": "git"}, {"lessThan": "411a3c016e7a95f5fa105a0587e07d0647a77727", "status": "affected", "version": "243e25112d06b348f087a6f7aba4bbc288285bdd", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/powerpc/platforms/powernv/smp.c", "arch/powerpc/platforms/pseries/smp.c", "arch/powerpc/sysdev/xive/common.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"lessThan": "4.12", "status": "unaffected", "version": "0", "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": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "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\npowerpc/xive: propagate IPI init errors to prevent use-after-free\n\nWhen xive_init_ipis() fails (e.g. irq_domain_alloc_irqs() fails),\nthe error path frees the global xive_ipis array. However,\nxive_smp_probe() previously ignored this failure and proceeded to\ncall xive_setup_cpu_ipi(), which dereferences the already-freed\nxive_ipis pointer -- a use-after-free.\n\nNow that xive_smp_probe() returns int (previous patch), propagate\nthe error from xive_init_ipis() and xive_setup_cpu_ipi() through\nxive_smp_probe(). Check the return value in both pnv_smp_probe()\nand pSeries_smp_probe() so that IPI setup is aborted cleanly on\nfailure, avoiding the use-after-free."}], "id": "CVE-2026-93260", "lastModified": "2026-10-30T13:21:01.547", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.4, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-24T16:17:22.670", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2ea6238343691309e68308131c7e80c3ae05afea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/411a3c016e7a95f5fa105a0587e07d0647a77727"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5c9ab0c9cede9f149733d330e2d7d45341b71359"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/89e1caa5b0aafe23e9938d9a311e9d41baee583e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c554a8d376d5aea1b237ed6bef6f9fbfc550e67f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e36b1c2eafcaaddefa70d55e6fda74cf6cda38af"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[243e25112d06b348f087a6f7aba4bbc288285bdd,c554a8d376d5aea1b237ed6bef6f9fbfc550e67f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[243e25112d06b348f087a6f7aba4bbc288285bdd,411a3c016e7a95f5fa105a0587e07d0647a77727)"}}], "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": "4.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "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": "2026-09-25T06:30:06.211874+00:00", "updated": "2026-09-25T10:30:10.628102+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}