CVE-2022-50569
Awaiting Analysis Awaiting Analysis - Queue
BaseFortify

Publication date: 2025-10-22

Last updated on: 2025-10-22

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: Update ipcomp_scratches with NULL when freed Currently if ipcomp_alloc_scratches() fails to allocate memory ipcomp_scratches holds obsolete address. So when we try to free the percpu scratches using ipcomp_free_scratches() it tries to vfree non existent vm area. Described below: static void * __percpu *ipcomp_alloc_scratches(void) { ... scratches = alloc_percpu(void *); if (!scratches) return NULL; ipcomp_scratches does not know about this allocation failure. Therefore holding the old obsolete address. ... } So when we free, static void ipcomp_free_scratches(void) { ... scratches = ipcomp_scratches; Assigning obsolete address from ipcomp_scratches if (!scratches) return; for_each_possible_cpu(i) vfree(*per_cpu_ptr(scratches, i)); Trying to free non existent page, causing warning: trying to vfree existent vm area. ... } Fix this breakage by updating ipcomp_scrtches with NULL when scratches is freed
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-10-22
Last Modified
2025-10-22
Generated
2026-05-07
AI Q&A
2025-10-22
EPSS Evaluated
2026-05-05
NVD
CVE-2022-50569
Affected Vendors & Products
Currently, no data is known.
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability occurs in the Linux kernel's xfrm subsystem where a failure to allocate memory for ipcomp_scratches leads to the variable holding an obsolete address. When the system later tries to free this memory, it attempts to free a non-existent virtual memory area, causing a warning and potential instability. The fix involves setting ipcomp_scratches to NULL when the memory is freed to avoid referencing invalid memory.


How can this vulnerability impact me? :

The impact of this vulnerability is that the Linux kernel may attempt to free invalid or non-existent memory areas, which can cause warnings and potentially lead to system instability or crashes.


Ask Our AI Assistant
Need more information? Ask your question to get an AI reply (Powered by our expertise)
0/70
EPSS Chart