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CVE-2026-89992

cpuidle: dt_idle_genpd: kfree() the original name allocation

HIGH
8.4
CVSS Score
Published: September 16, 2026 at 10:33 AM UTC
Updated: October 19, 2026 at 09:18 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.4
Exploit prediction
EPSS 0.2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
5.189d976d6721dfb525b81ce981e1363c70c0975aab
Vendor states this is fixed in 09d002c8fb0261d35ce9d8a705de5db034ee90b8 (fixed)
Vendor states this is fixed in 1312ae33b91430ec99e69cd3d47f0e50a4ebf54b (fixed)
Vendor states this is fixed in 2b0ac85512b7f67479127b2713254490662eb13d (fixed)
Vendor states this is fixed in 3394c7ba23336bdb7ece29127130fd01731d42d8 (fixed)
Vendor states this is fixed in a38caa9ed0d5c61c17d88393b14b292199289c1f (fixed)
Vendor states this is fixed in b519dfce1998c323e54a56f911cf708d9ba0e076 (fixed)
Vendor states this is fixed in 5.18 (unaffected)
Vendor states this is fixed in 6.1.188 (unaffected)
Vendor states this is fixed in 6.12.110 (unaffected)
Vendor states this is fixed in 6.18.51 (unaffected)
Vendor states this is fixed in 6.6.157 (unaffected)
Vendor states this is fixed in 7.2.5 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

Source: cverecord
https://git.kernel.org/stable/c/1312ae33b91430ec99e69cd3d47f0e50a4ebf54b
Source: cverecord
https://git.kernel.org/stable/c/a38caa9ed0d5c61c17d88393b14b292199289c1f
Source: cverecord
https://git.kernel.org/stable/c/09d002c8fb0261d35ce9d8a705de5db034ee90b8
Source: cverecord
https://git.kernel.org/stable/c/b519dfce1998c323e54a56f911cf708d9ba0e076
Source: cverecord
https://git.kernel.org/stable/c/3394c7ba23336bdb7ece29127130fd01731d42d8
Source: cverecord
https://git.kernel.org/stable/c/2b0ac85512b7f67479127b2713254490662eb13d

CVSS

8.4HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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