EUVD-2026-80600
GHSA-6r3p-g4m6-vqrh
Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Reached only via privileged genpd teardown/probe-error on DT-supplied data (PR:H, AC:H, AV:L); invalid free yields a crash only (C:N/I:N/A:H).
Primary rating from Vendor (Linux).
CVSS VectorVendor: Linux
Lifecycle Timeline
7DescriptionCVE.org
In the Linux kernel, the following vulnerability has been resolved:
cpuidle: dt_idle_genpd: kfree() the original name allocation
dt_idle_pd_alloc() kasprintf()s the full node path, then points pd->name at kbasename() of that string. dt_idle_pd_free() kfree()s pd->name, which is no longer the start of the allocation.
Copy the basename instead.
AnalysisAI
Improper freeing of a kernel heap buffer in the Linux kernel's cpuidle device-tree idle power-domain support (dt_idle_genpd) can crash affected systems when a device-tree idle power domain is torn down. Kernels built with CONFIG_DT_IDLE_GENPD and instantiated DT idle power domains - introduced by commit 9d976d6721df (present since Linux 5.18) and fixed in stable releases 6.1.188, 6.6.157, 6.12.110, 6.18.51 and 7.2.5/7.3-rc2 - are affected, which in practice means ARM/embedded PSCI-style platforms whose firmware provides cpuidle power-domain nodes. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an affected kernel (5.18 through the fixed stable releases) built with cpuidle device-tree idle power-domain support (dt_idle_genpd), typical of ARM/embedded PSCI platforms. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a classic high-CVSS-but-low-real-risk kernel hygiene bug. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: upgrade to Linux 6.1.188, 6.6.157, 6.12.110, 6.18.51, or 7.2.5/7.3-rc2, or apply the corresponding stable backport commit for your branch (1312ae33b91430ec99e69cd3d47f0e50a4ebf54b, a38caa9ed0d5c61c17d88393b14b292199289c1f, 09d002c8fb0261d35ce9d8a705de5db034ee90b8, b519dfce1998c323e54a56f911cf708d9ba0e076, 3394c7ba23336bdb7ece29127130fd01731d42d8, 2b0ac85512b7f67479127b2713254490662eb13d) - the change is a small, self-contained fix that copies the basename into its own allocation, so it carries essentially no regression risk and is the only correct remedy. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Linux kernel deployments with CONFIG_DT_IDLE_GENPD enabled, focusing on ARM/embedded PSCI-style platforms, and verify kernel versions against the affected range (5.18 through prior to 6.1.188, 6.6.157, 6.12.110, 6.18.51, or 7.2.5/7.3-rc2). …
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Same technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today