CVE-2025-68744

Summary

In the Linux kernel, the following vulnerability has been resolved:

bpf: Free special fields when update [lru_,]percpu_hash maps

As [lru_,]percpu_hash maps support BPF_KPTR_{REF,PERCPU}, missing calls to 'bpf_obj_free_fields()' in 'pcpu_copy_value()' could cause the memory referenced by BPF_KPTR_{REF,PERCPU} fields to be held until the map gets freed.

Fix this by calling 'bpf_obj_free_fields()' after 'copy_map_value,_long' in 'pcpu_copy_value()'.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux65334e64a493c6a0976de7ad56bf8b7a9ff04b4a < 994d6303ed0b84cbc795bb5becf7ed6de40d3f3caffected
LinuxLinux65334e64a493c6a0976de7ad56bf8b7a9ff04b4a < 3bf1378747e251571e0de15e7e0a6bf2919044e7affected
LinuxLinux65334e64a493c6a0976de7ad56bf8b7a9ff04b4a < 96a5cb7072cabbac5c66ac9318242c3bdceebb68affected
LinuxLinux65334e64a493c6a0976de7ad56bf8b7a9ff04b4a < 4a03d69cece145e4fb527464be29c3806aa3221eaffected
LinuxLinux65334e64a493c6a0976de7ad56bf8b7a9ff04b4a < 6af6e49a76c9af7d42eb923703e7648cb2bf401aaffected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.6.120 <= 6.6.*unaffected
LinuxLinux6.12.63 <= 6.12.*unaffected
LinuxLinux6.17.13 <= 6.17.*unaffected
LinuxLinux6.18.2 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

References