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CVE-2022-50318: perf/x86/intel/uncore: Fix reference count leak in hswep_has_limit_sbox()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-15 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel/uncore: Fix reference count leak in hswep_has_limit_sbox() pci_get_device() will increase the reference count for the returned 'dev'. We need to call pci_dev_put() to decrease the reference count. Since 'dev' is only used in pci_read_config_dword(), let's add pci_dev_put() right after it.

Affected products

• Linux kernel: from 4.19.189 before 4.19.270; from 5.4.115 before 5.4.229; from 5.10.33 before 5.10.163; from 5.11.17 before 5.12; from 5.12.1 before 5.15.86; from 5.16 before 6.0.16 — fixed in 4.19.270, 5.10.163, 5.12, 5.15.86, 5.4.229, 6.0.16

How to fix

Upgrade to a fixed version: Linux kernel 4.19.270, 5.10.163, 5.12, 5.15.86. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1ff9dd6e7071a561f803135c1d684b13c7a7d01d
• https://git.kernel.org/stable/c/3485f197518061371568f842405159aa9e4df551
• https://git.kernel.org/stable/c/48f32b9a74e2ac8e854bb87bfefdbc745125a123
• https://git.kernel.org/stable/c/5a96c10a56037db006ba6769307a9731cf6073be
• https://git.kernel.org/stable/c/bd66877c0b3b42eed0ecee0bd2a2a505c1e54177
• https://git.kernel.org/stable/c/c0539d5d474ee6fa4ebc41f927a0f98f81244f25
• https://git.kernel.org/stable/c/e293263248f25c6b8aa1caf7c1103d40aa03311e

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