CVE-2025-21736

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.

The following products are affected by CVE-2025-21736 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-21736.

URL	Resource
https://git.kernel.org/stable/c/250423300b4b0335918be187ef3cade248c06e6a
https://git.kernel.org/stable/c/58b1c6881081f5ddfb9a14dc241a74732c0f855c
https://git.kernel.org/stable/c/6438ef381c183444f7f9d1de18f22661cba1e946
https://git.kernel.org/stable/c/7649937987fed51ed09985da4019d50189fc534e
https://git.kernel.org/stable/c/8f41df5fd4c11d26e929a85f7239799641f92da7
https://git.kernel.org/stable/c/b9495a9109abc31d3170f7aad7d48aa64610a1a2
https://git.kernel.org/stable/c/f2bd0f1ab47822fe5bd699c8458b896c4b2edea1
https://git.kernel.org/stable/c/f3d80f34f58445355fa27b9579a449fb186aa64e
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
https://lore.kernel.org/linux-cve-announce/2025022659-CVE-2025-21736-6d94@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2025-21736
https://www.cve.org/CVERecord?id=CVE-2025-21736