CVE-2026-23235

CVE-2026-23235 (Linux kernel, f2fs) is a local, in-kernel vulnerability where certain f2fs sysfs attributes permit out-of-bounds memory access and misinterpretation of integer sizes. The root causes are: __sbi_store() and f2fs_sbi_show() incorrectly treat all default values as unsigned int, causi...

CVE-2026-23235 f2fs: fix out-of-bounds access in sysfs attribute read/write

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix out-of-bounds access in sysfs attribute read/write Some f2fs sysfs attributes suffer from out-of-bounds memory access and incorrect handling of integer values whose size is not 4 bytes. For example: vm: echo 65537...

CVE-2026-23235

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix out-of-bounds access in sysfs attribute read/write Some f2fs sysfs attributes suffer from out-of-bounds memory access and incorrect handling of integer values whose size is not 4 bytes. For example: vm: echo 65537...

CVE-2026-23235 f2fs: fix out-of-bounds access in sysfs attribute read/write

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix out-of-bounds access in sysfs attribute read/write Some f2fs sysfs attributes suffer from out-of-bounds memory access and incorrect handling of integer values whose size is not 4 bytes. For example: vm: echo 65537...

CVE-2026-23233

CVE-2026-23233 covers a Linux kernel f2fs bug where swapfile mapping can go wrong when the first extent is unaligned and the swapfile is small (

CVE-2026-23233

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid mapping wrong physical block for swapfile Xiaolong Guo reported a f2fs bug in bugzilla 1 1 https://bugzilla.kernel.org/showbug.cgi?id=220951 Quoted: "When using stress-ng's swap stress test on F2FS filesystem...

CVE-2026-23234 f2fs: fix to avoid UAF in f2fs_write_end_io()

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid UAF in f2fswriteendio As syzbot reported an use-after-free issue in f2fswriteendio. It is caused by below race condition: loop device umount - workerthread - loopprocesswork - doreqfilebacked - lorwaio -...

CVE-2026-23233

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid mapping wrong physical block for swapfile Xiaolong Guo reported a f2fs bug in bugzilla 1 1 https://bugzilla.kernel.org/showbug.cgi?id=220951 Quoted: "When using stress-ng's swap stress test on F2FS filesystem...

CVE-2026-23233 f2fs: fix to avoid mapping wrong physical block for swapfile

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid mapping wrong physical block for swapfile Xiaolong Guo reported a f2fs bug in bugzilla 1 1 https://bugzilla.kernel.org/showbug.cgi?id=220951 Quoted: "When using stress-ng's swap stress test on F2FS filesystem...

CVE-2026-23234

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid UAF in f2fswriteendio As syzbot reported an use-after-free issue in f2fswriteendio. It is caused by below race condition: loop device umount - workerthread - loopprocesswork - doreqfilebacked - lorwaio -...

CVE-2026-23234 f2fs: fix to avoid UAF in f2fs_write_end_io()

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid UAF in f2fswriteendio As syzbot reported an use-after-free issue in f2fswriteendio. It is caused by below race condition: loop device umount - workerthread - loopprocesswork - doreqfilebacked - lorwaio -...

CVE-2026-23234

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid UAF in f2fswriteendio As syzbot reported an use-after-free issue in f2fswriteendio. It is caused by below race condition: loop device umount - workerthread - loopprocesswork - doreqfilebacked - lorwaio -...

CVE-2026-23232 Revert "f2fs: block cache/dio write during f2fs_enable_checkpoint()"

In the Linux kernel, the following vulnerability has been resolved: Revert "f2fs: block cache/dio write during f2fsenablecheckpoint" This reverts commit 196c81fdd438f7ac429d5639090a9816abb9760a. Original patch may cause below deadlock, revert it. write remount - writebegin - lockpage --- lock A -...

CVE-2026-23232 Revert "f2fs: block cache/dio write during f2fs_enable_checkpoint()"

In the Linux kernel, the following vulnerability has been resolved: Revert "f2fs: block cache/dio write during f2fsenablecheckpoint" This reverts commit 196c81fdd438f7ac429d5639090a9816abb9760a. Original patch may cause below deadlock, revert it. write remount - writebegin - lockpage --- lock A -...

CVE-2026-23232

In the Linux kernel, the following vulnerability has been resolved: Revert "f2fs: block cache/dio write during f2fsenablecheckpoint" This reverts commit 196c81fdd438f7ac429d5639090a9816abb9760a. Original patch may cause below deadlock, revert it. write remount - writebegin - lockpage --- lock A -...

CVE-2026-23232

The CVE-2026-23232 entry pertains to the Linux kernel and the f2fs file system. According to the connected data, a patch intended to enable a block cache/DIO write during f2fs_enable_checkpoint() was reverted because the original patch could cause a deadlock. The revert sequence involves lock ord...

CVE-2026-23232

In the Linux kernel, the following vulnerability has been resolved: Revert "f2fs: block cache/dio write during f2fsenablecheckpoint" This reverts commit 196c81fdd438f7ac429d5639090a9816abb9760a. Original patch may cause below deadlock, revert it. write remount - writebegin - lockpage --- lock A -...

PT-2026-22919

Name of the Vulnerable Software and Affected Versions Linux kernel versions 6.6 and later Description A flaw exists in the f2fs filesystem within the Linux kernel related to swapfile handling. Specifically, the check swap activate function incorrectly maps physical blocks when a swapfile is small...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-005485)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005485 advisory. In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on sitbitmapsize w/ below testcase, resize will generate a corrupted...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-005568)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005568 advisory. In the Linux kernel, the following vulnerability has been resolved: f2fs: Require FMODEWRITE for atomic write ioctls The F2FS ioctls for starting and committing atom...