What’s Vulnerable › Vulnerabilities

CVE-2025-21998: firmware: qcom: uefisecapp: fix efivars registration race

• Severity: medium (CVSS 4.7 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: 2025-04-03 · updated 2026-06-17
• Weakness: CWE-367

Description

In the Linux kernel, the following vulnerability has been resolved: firmware: qcom: uefisecapp: fix efivars registration race Since the conversion to using the TZ allocator, the efivars service is registered before the memory pool has been allocated, something which can lead to a NULL-pointer dereference in case of a racing EFI variable access. Make sure that all resources have been set up before registering the efivars.

Affected products

• Linux kernel: from 6.11 before 6.12.21; from 6.13 before 6.13.9; 6.14-rc1, 6.14-rc2, 6.14-rc3, 6.14-rc4, 6.14-rc5, 6.14-rc6 (+1) — fixed in 6.12.21, 6.13.9

How to fix

Upgrade to a fixed version: Linux kernel 6.12.21, 6.13.9. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/c4e37b381a7a243c298a4858fc0a5a74e737c79a
• https://git.kernel.org/stable/c/da8d493a80993972c427002684d0742560f3be4a
• https://git.kernel.org/stable/c/f15a2b96a0e41c426c63a932d0e63cde7b9784aa

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