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CVE-2026-64147: pds_core: fix debugfs_lookup dentry leak and error handling

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-19 · updated 2026-08-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: pds_core: fix debugfs_lookup dentry leak and error handling debugfs_lookup() returns a dentry with an elevated reference count that must be released with dput(). The current code discards the returned dentry without calling dput(), causing a reference leak on every firmware reset recovery. Additionally, when CONFIG_DEBUG_FS is disabled, debugfs_lookup() returns ERR_PTR(-ENODEV), not NULL. The current check passes for error pointers and would call dput() on an invalid pointer, causing a crash.

Affected products

• Linux kernel: from 6.6.16 before 6.6.142; from 6.7.4 before 6.8; from 6.8.1 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.11; 6.8, 6.8-rc3, 6.8-rc4, 6.8-rc5, 6.8-rc6, 6.8-rc7 (+4) — fixed in 6.12.92, 6.18.34, 6.6.142, 6.8, 7.0.11

How to fix

Upgrade to a fixed version: Linux kernel 6.12.92, 6.18.34, 6.6.142, 6.8. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/26e19622c485e53c3fdb299e822068a0542ddf0c
• https://git.kernel.org/stable/c/60ef1675b652e912f3eb064767af4432393291fd
• https://git.kernel.org/stable/c/91d13e92b983e6c6d7631012c2e20ae8057de9f2
• https://git.kernel.org/stable/c/d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32
• https://git.kernel.org/stable/c/dc416e32baaeb620b9809e9e25fc7b30889686e9

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