CVE-2026-93260
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/xive: propagate IPI init errors to prevent use-after-free When xive_init_ipis() fails (e.g. irq_domain_alloc_irqs() fails), the error path frees the global xive_ipis array. However, xive_smp_probe() previously ignored this failure and proceeded to call xive_setup_cpu_ipi(), which dereferences the already-freed xive_ipis pointer -- a use-after-free. Now that xive_smp_probe() returns int (previous patch), propagate the error from xive_init_ipis() and xive_setup_cpu_ipi() through xive_smp_probe(). Check the return value in both pnv_smp_probe() and pSeries_smp_probe() so that IPI setup is aborted cleanly on failure, avoiding the use-after-free.
Severity
HIGH
CVSS score
7.4
(v3.1)
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-24 16:17:22.670000
Last modified
2026-10-30 13:21:01.547000
View original CVE JSON
{
"id": "CVE-2026-93260",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-24T16:17:22.670",
"lastModified": "2026-10-30T13:21:01.547",
"vulnStatus": "Received",
"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."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"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",
"versions": [
{
"version": "243e25112d06b348f087a6f7aba4bbc288285bdd",
"lessThan": "89e1caa5b0aafe23e9938d9a311e9d41baee583e",
"versionType": "git",
"status": "affected"
},
{
"version": "243e25112d06b348f087a6f7aba4bbc288285bdd",
"lessThan": "e36b1c2eafcaaddefa70d55e6fda74cf6cda38af",
"versionType": "git",
"status": "affected"
},
{
"version": "243e25112d06b348f087a6f7aba4bbc288285bdd",
"lessThan": "2ea6238343691309e68308131c7e80c3ae05afea",
"versionType": "git",
"status": "affected"
},
{
"version": "243e25112d06b348f087a6f7aba4bbc288285bdd",
"lessThan": "5c9ab0c9cede9f149733d330e2d7d45341b71359",
"versionType": "git",
"status": "affected"
},
{
"version": "243e25112d06b348f087a6f7aba4bbc288285bdd",
"lessThan": "c554a8d376d5aea1b237ed6bef6f9fbfc550e67f",
"versionType": "git",
"status": "affected"
},
{
"version": "243e25112d06b348f087a6f7aba4bbc288285bdd",
"lessThan": "411a3c016e7a95f5fa105a0587e07d0647a77727",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"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",
"versions": [
{
"version": "4.12",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.12",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.160",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.114",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.57",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.6",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"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",
"attackVector": "LOCAL",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.4,
"impactScore": 5.9
}
]
},
"references": [
{
"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",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}