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vuln-cve/data/2026/74xxx/CVE-2026-74405.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-74405",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-08-15T05:44:03.892Z",
"datePublished": "2026-08-15T05:59:14.719Z",
"dateUpdated": "2026-10-30T12:29:58.561Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-10-30T12:29:58.561Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nOPP: Fix race between OPP addition and lookup\n\nA race exists between dev_pm_opp_add_dynamic() and\ndev_pm_opp_find_freq_exact():\n\n CPU0 (add) CPU1 (lookup)\n ------------------------------- ------------------------------\n _opp_add()\n mutex_lock()\n list_add(&new_opp->node, head)\n mutex_unlock() _opp_table_find_key()\n mutex_lock()\n dev_pm_opp_get(opp)\n kref_get()\n mutex_unlock()\n kref_init(&new_opp->kref)\n dev_pm_opp_put()\n kref_put_mutex()\n\nThe newly added OPP is inserted into the list before its kref is\ninitialized. A concurrent lookup can find this OPP and increment its\nreference count while it is still uninitialized, leading to refcount\ncorruption and a potential premature free.\n\nFix this by initializing ->kref and ->opp_table before making the OPP\nvisible via list_add(). This ensures any concurrent lookup observes a\nfully initialized object.\n\n[ Viresh: Updated commit log ]"
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The bug is in the kernel OPP DVFS core reached only from local cpufreq, devfreq, thermal, and GPU power-management paths (e.g. scmi-cpufreq, mtk-mfg, MSM Adreno) that call dev_pm_opp_add_dynamic() and dev_pm_opp_find_freq_exact(); there is no network, adjacent-radio, or physical-device input into _opp_add().\nAC:L - The attacker can drive the lookup side with parallel CPU/GPU load or cpufreq scaling while the kernel concurrently inserts OPPs via _opp_add() during multi-CPU SCMI/GPU power-domain attach and boot cpufreq init; both race participants are attacker-influenceable timing on multi-core ARM/Android/embedded systems.\nPR:L - No init-namespace root is required to hammer dev_pm_opp_find_freq_exact() through normal cpufreq, thermal, or GPU DVFS activity from an unprivileged local process; OPP registration runs automatically in kernel driver attach/probe paths without attacker credentials.\nUI:N - Exploitation does not require any victim action beyond the attacker (or kernel) driving DVFS activity; no mount, file open, or other interactive step is needed once the attacker runs concurrent workload or scaling pressure on the target system.\nS:U - Refcount corruption causes premature kfree() of a dev_pm_opp slab object still linked in the OPP table, enabling standard kernel memory corruption and privilege escalation within the same OS boundary rather than a VM, IOMMU, or sandbox escape.\nC:H - Uninitialized kref_get()/kref_init() races corrupt the OPP refcount and can free the structure while still listed; this use-after-free of kmalloc'd dev_pm_opp memory can expose adjacent heap contents and support arbitrary kernel read primitives.\nI:H - Premature free of dev_pm_opp while its list node remains reachable allows heap reuse and controlled writes through subsequent allocations, providing a standard path to corrupt kernel objects and achieve arbitrary code execution.\nA:H - Refcount corruption can trigger _opp_kref_release() to kfree() an OPP still referenced by concurrent lookups, causing kernel oops/panic from use-after-free or list corruption during ongoing DVFS operations."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/opp/core.c"
],
"versions": [
{
"version": "7034764a1e4a6edbb60914e89aad8384e3fe5d17",
"lessThan": "835b9b5b4d287a03c713680b0231d36ff599201b",
"status": "affected",
"versionType": "git"
},
{
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"status": "affected",
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},
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"lessThan": "e25be5d812ec8ca2615d23726b3861b04e2fff35",
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{
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{
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"status": "affected",
"versionType": "git"
},
{
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"lessThan": "f5e1cc9a284bff2510981643a5bca4bc4c21b81a",
"status": "affected",
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}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/opp/core.c"
],
"versions": [
{
"version": "4.11",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.11",
"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": "6.12.114",
"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",
"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": "4.11",
"versionEndExcluding": "5.10.273"
},
{
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],
"references": [
{
"url": "https://git.kernel.org/stable/c/835b9b5b4d287a03c713680b0231d36ff599201b"
},
{
"url": "https://git.kernel.org/stable/c/2fb061a90898420d8ca1a0b9959ca977d90fa841"
},
{
"url": "https://git.kernel.org/stable/c/e25be5d812ec8ca2615d23726b3861b04e2fff35"
},
{
"url": "https://git.kernel.org/stable/c/932ebfad767be1395946cbc1727a7c38eeee3d24"
},
{
"url": "https://git.kernel.org/stable/c/1946ea2f6b3ec00e313c78e83fc196f1f6aba2a9"
},
{
"url": "https://git.kernel.org/stable/c/46696b0b2123475d7f95909435c09808fc5ffd23"
},
{
"url": "https://git.kernel.org/stable/c/bb75bd7d9ae7672034f73ce67a57e6ac89bb39e5"
},
{
"url": "https://git.kernel.org/stable/c/f5e1cc9a284bff2510981643a5bca4bc4c21b81a"
}
],
"title": "OPP: Fix race between OPP addition and lookup",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-74405",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-10-16T18:55:48.602720Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-16T19:05:43.186Z"
}
}
]
}
}
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