CVE-2022-49425
"F2FS Kernel Dereference Out-of-Bounds Pointer"
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix dereference of stale list iterator after loop body The list iterator variable will be a bogus pointer if no break was hit. Dereferencing it (cur->page in this case) could load an out-of-bounds/undefined value making it unsafe to use that in the comparision to determine if the specific element was found. Since 'cur->page' *can* be out-ouf-bounds it cannot be guaranteed that by chance (or intention of an attacker) it matches the value of 'page' even though the correct element was not found. This is fixed by using a separate list iterator variable for the loop and only setting the original variable if a suitable element was found. Then determing if the element was found is simply checking if the variable is set.
INFO
Published Date :
Feb. 26, 2025, 7:01 a.m.
Last Modified :
Feb. 26, 2025, 7:01 a.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
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CVE-2022-49425.
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CVE-2022-49425 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-49425 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 26, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: f2fs: fix dereference of stale list iterator after loop body The list iterator variable will be a bogus pointer if no break was hit. Dereferencing it (cur->page in this case) could load an out-of-bounds/undefined value making it unsafe to use that in the comparision to determine if the specific element was found. Since 'cur->page' *can* be out-ouf-bounds it cannot be guaranteed that by chance (or intention of an attacker) it matches the value of 'page' even though the correct element was not found. This is fixed by using a separate list iterator variable for the loop and only setting the original variable if a suitable element was found. Then determing if the element was found is simply checking if the variable is set. Added Reference https://git.kernel.org/stable/c/2aaf51dd39afb6d01d13f1e6fe20b684733b37d5 Added Reference https://git.kernel.org/stable/c/385edd3ce5b4b1e9d31f474a5e35a39779ec1110 Added Reference https://git.kernel.org/stable/c/45b2b7d7108ae1e25a5036cab04ab9273e792332 Added Reference https://git.kernel.org/stable/c/51d584704d18e60fa473823654f35611c777b291 Added Reference https://git.kernel.org/stable/c/5e47a7add3dda7f236548c5ec3017776dc2a729f Added Reference https://git.kernel.org/stable/c/b26e1c777890e4b938136deb8ec07a29f33862e4 Added Reference https://git.kernel.org/stable/c/ed7efc472c00986dcd6903ab6ed165c7fa167674
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-49425 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-49425
weaknesses.