CVE-2025-21998: firmware: qcom: uefisecapp: fix efivars registration race
First published: Thu Apr 03 2025(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=6.11<6.12.21 | |
| Linux Kernel | >=6.13<6.13.9 | |
| Linux Kernel | =6.14-rc1 | |
| Linux Kernel | =6.14-rc2 | |
| Linux Kernel | =6.14-rc3 | |
| Linux Kernel | =6.14-rc4 | |
| Linux Kernel | =6.14-rc5 | |
| Linux Kernel | =6.14-rc6 | |
| Linux Kernel | =6.14-rc7 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-21998?
CVE-2025-21998 has a medium severity rating due to potential memory allocation issues in the Linux kernel.
How do I fix CVE-2025-21998?
To fix CVE-2025-21998, update your Linux kernel to the latest patched version that addresses this vulnerability.
What systems are affected by CVE-2025-21998?
CVE-2025-21998 affects certain versions of the Linux kernel using the TZ allocator for efivars registration.
Can CVE-2025-21998 lead to system instability?
Yes, CVE-2025-21998 can lead to system instability due to a potential race condition in memory pool allocation.
Is there a workaround for CVE-2025-21998?
There are no documented workarounds for CVE-2025-21998; the recommended action is to apply the kernel update.
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