arch_topology: Fix incorrect error check in topology_parse_cpu_capacity() (Linux Linux)

CVE-2025-40346
Not available

At a glance

Source
NVD
EPSS
EPSS 0.21 % · percentile 11 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Deferred

Description

In the Linux kernel, the following vulnerability has been resolved: arch_topology: Fix incorrect error check in topology_parse_cpu_capacity() Fix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity() which causes the code to proceed with NULL clock pointers. The current logic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both valid pointers and NULL, leading to potential NULL pointer dereference in clk_get_rate(). Per include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns: "The error code within @ptr if it is an error pointer; 0 otherwise." This means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL pointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed) when cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be called when of_clk_get() returns NULL. Replace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid pointers, preventing potential NULL pointer dereference in clk_get_rate().

References

European references

CERT-FR advisories

Affected products

ProductVersions
Linux · Linuxaffected b8fe128dad8f97cc9af7c55a264d1fc5ab677195 < 64da320252e43456cc9ec3055ff567f168467b37 ; affected b8fe128dad8f97cc9af7c55a264d1fc5ab677195 < 02fbea0864fd4a863671f5d418129258d7159f68 ; affected b8fe128dad8f97cc9af7c55a264d1fc5ab677195 < a77f8434954cb1e9c42c3854e40855fdcf5ab235 ; affected b8fe128dad8f97cc9af7c55a264d1fc5ab677195 < 3373f263bb647fcc3b5237cfaef757633b9ee25e ; affected b8fe128dad8f97cc9af7c55a264d1fc5ab677195 < 45379303124487db3a81219af7565d41f498167f ; affected b8fe128dad8f97cc9af7c55a264d1fc5ab677195 < 3a01b2614e84361aa222f67bc628593987e5cdb2
Linux · Linuxaffected 5.7 ; unaffected 0 < 5.7 ; unaffected 5.10.246 ≤ 5.10.* ; unaffected 5.15.196 ≤ 5.15.* ; unaffected 6.1.158 ≤ 6.1.* ; unaffected 6.6.115 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD