CVE-2022-49425
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.
Does this matter?
Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.27% probability · 19th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2aaf51dd39afb6d01d13f1e6fe20b684733b37d5Patch
- https://git.kernel.org/stable/c/385edd3ce5b4b1e9d31f474a5e35a39779ec1110Patch
- https://git.kernel.org/stable/c/45b2b7d7108ae1e25a5036cab04ab9273e792332Patch
- https://git.kernel.org/stable/c/51d584704d18e60fa473823654f35611c777b291Patch
- https://git.kernel.org/stable/c/5e47a7add3dda7f236548c5ec3017776dc2a729fPatch
- https://git.kernel.org/stable/c/b26e1c777890e4b938136deb8ec07a29f33862e4Patch
- https://git.kernel.org/stable/c/ed7efc472c00986dcd6903ab6ed165c7fa167674Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.