CVE-2025-21736
nilfs2: fix possible int overflows in nilfs_fiemap()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix possible int overflows in nilfs_fiemap() Since nilfs_bmap_lookup_contig() in nilfs_fiemap() 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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.38
References 8
git.kernel.org
- stable/c/7649937987fed51ed09985da4019d50189fc534e
- stable/c/58b1c6881081f5ddfb9a14dc241a74732c0f855c
- stable/c/8f41df5fd4c11d26e929a85f7239799641f92da7
- stable/c/f3d80f34f58445355fa27b9579a449fb186aa64e
- stable/c/f2bd0f1ab47822fe5bd699c8458b896c4b2edea1
- stable/c/b9495a9109abc31d3170f7aad7d48aa64610a1a2
- stable/c/250423300b4b0335918be187ef3cade248c06e6a
- stable/c/6438ef381c183444f7f9d1de18f22661cba1e946