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Description

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()'.

PUBLISHED Reserved 2025-12-24 | Published 2025-12-24 | Updated 2026-02-09 | Assigner Linux

Product status

Default status
unaffected

65334e64a493c6a0976de7ad56bf8b7a9ff04b4a (git) before 994d6303ed0b84cbc795bb5becf7ed6de40d3f3c
affected

65334e64a493c6a0976de7ad56bf8b7a9ff04b4a (git) before 3bf1378747e251571e0de15e7e0a6bf2919044e7
affected

65334e64a493c6a0976de7ad56bf8b7a9ff04b4a (git) before 96a5cb7072cabbac5c66ac9318242c3bdceebb68
affected

65334e64a493c6a0976de7ad56bf8b7a9ff04b4a (git) before 4a03d69cece145e4fb527464be29c3806aa3221e
affected

65334e64a493c6a0976de7ad56bf8b7a9ff04b4a (git) before 6af6e49a76c9af7d42eb923703e7648cb2bf401a
affected

Default status
affected

6.4
affected

Any version before 6.4
unaffected

6.6.120 (semver)
unaffected

6.12.63 (semver)
unaffected

6.17.13 (semver)
unaffected

6.18.2 (semver)
unaffected

6.19 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/994d6303ed0b84cbc795bb5becf7ed6de40d3f3c

git.kernel.org/...c/3bf1378747e251571e0de15e7e0a6bf2919044e7

git.kernel.org/...c/96a5cb7072cabbac5c66ac9318242c3bdceebb68

git.kernel.org/...c/4a03d69cece145e4fb527464be29c3806aa3221e

git.kernel.org/...c/6af6e49a76c9af7d42eb923703e7648cb2bf401a

cve.org (CVE-2025-68744)

nvd.nist.gov (CVE-2025-68744)

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