CVE-2025-21736

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Source
https://cve.org/CVERecord?id=CVE-2025-21736
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21736.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-21736
Downstream
Related
Published
2025-02-27T02:12:12.871Z
Modified
2026-05-15T11:54:03.504903763Z
Summary
nilfs2: fix possible int overflows in nilfs_fiemap()
Details

In the Linux kernel, the following vulnerability has been resolved:

nilfs2: fix possible int overflows in nilfs_fiemap()

Since nilfsbmaplookupcontig() in nilfsfiemap() calculates its result by being prepared to go through potentially maxblocks == INT_MAX blocks, the value in n may experience an overflow caused by left shift of blkbits.

While it is extremely unlikely to occur, play it safe and cast right hand expression to wider type to mitigate the issue.

Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21736.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.38
Fixed
5.4.291
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.235
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.179
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.129
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.78
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.14
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.13.3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21736.json"