CVE-2026-31715

In Linux kernel (f2fs), CVE-2026-31715 is a use-after-free triggered by decrementing sbi->nr_pages[] during F2FS_WB_CP_DATA handling. The root cause is that f2fs_put_super() calls iput(sbi->node_inode) and NULLs the node_inode after the counter reaches zero, allowing f2fs_in_warm_node_list(...

CVE-2026-31715 f2fs: fix UAF caused by decrementing sbi->nr_pages[] in f2fs_write_end_io()

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix UAF caused by decrementing sbi-nrpages in f2fswriteendio The xfstests case "generic/107" and syzbot have both reported a NULL pointer dereference. The concurrent scenario that triggers the panic is as follows:...

CVE-2026-31714 f2fs: fix to avoid memory leak in f2fs_rename()

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid memory leak in f2fsrename syzbot reported a f2fs bug as below: BUG: memory leak unreferenced object 0xffff888127f70830 size 16: comm "syz.0.23", pid 6144, jiffies 4294943712 hex dump first 16 bytes: 3c af 57 72...

CVE-2026-31714

The CVE-2026-31714 issue affects the Linux kernel F2FS component, where a memory leak occurs in f2fs_rename() due to an unpaired call to f2fs_free_filename() after f2fs_setup_filename() was added in commit 40b2d55e0452. Exploitation details are local (AV:L/AC:L) with a high availability impact (A...

CVE-2026-31714

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid memory leak in f2fsrename syzbot reported a f2fs bug as below: BUG: memory leak unreferenced object 0xffff888127f70830 size 16: comm "syz.0.23", pid 6144, jiffies 4294943712 hex dump first 16 bytes: 3c af 57 72...

EUVD-2026-26523

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid memory leak in f2fsrename syzbot reported a f2fs bug as below: BUG: memory leak unreferenced object 0xffff888127f70830 size 16: comm "syz.0.23", pid 6144, jiffies 4294943712 hex dump first 16 bytes: 3c af 57 72...

CVE-2026-31714 f2fs: fix to avoid memory leak in f2fs_rename()

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid memory leak in f2fsrename syzbot reported a f2fs bug as below: BUG: memory leak unreferenced object 0xffff888127f70830 size 16: comm "syz.0.23", pid 6144, jiffies 4294943712 hex dump first 16 bytes: 3c af 57 72...

CVE-2026-31702

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix use-after-free of sbi in f2fscompresswriteendio In f2fscompresswriteendio, decpagecountsbi, type can bring the F2FSWBCPDATA counter to zero, unblocking f2fswaitonallpages in f2fsputsuper on a concurrent unmount CPU. The...

CVE-2026-31702

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix use-after-free of sbi in f2fscompresswriteendio In f2fscompresswriteendio, decpagecountsbi, type can bring the F2FSWBCPDATA counter to zero, unblocking f2fswaitonallpages in f2fsputsuper on a concurrent unmount CPU. The...

EUVD-2026-26511

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix use-after-free of sbi in f2fscompresswriteendio In f2fscompresswriteendio, decpagecountsbi, type can bring the F2FSWBCPDATA counter to zero, unblocking f2fswaitonallpages in f2fsputsuper on a concurrent unmount CPU. The...

CVE-2026-31702 f2fs: fix use-after-free of sbi in f2fs_compress_write_end_io()

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix use-after-free of sbi in f2fscompresswriteendio In f2fscompresswriteendio, decpagecountsbi, type can bring the F2FSWBCPDATA counter to zero, unblocking f2fswaitonallpages in f2fsputsuper on a concurrent unmount CPU. The...

CVE-2026-31702 f2fs: fix use-after-free of sbi in f2fs_compress_write_end_io()

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix use-after-free of sbi in f2fscompresswriteendio In f2fscompresswriteendio, decpagecountsbi, type can bring the F2FSWBCPDATA counter to zero, unblocking f2fswaitonallpages in f2fsputsuper on a concurrent unmount CPU. The...

CLSA-2026-1777637310 Fix of 13 CVEs

CVE-2026-31431 - crypto: authencesn - reject too-short AAD assoclen8 to match ESP/ESN spec CVE-2026-31431 - crypto: scatterwalk - Backport memcpysglist CVE-2026-31431 - crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption CVE-2026-31431 - crypto: authencesn - Fix src...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the improper order of calls to decpagecount in f2fscompresswriteendio. This could lead to accessi...

PT-2026-36345

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free condition exists in the f2fs component of the Linux kernel. The issue occurs in the f2fs write end io function when sbi-nr pagesF2FS WB CP DATA is decremented to zero...

PT-2026-36332

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the f2fs compress write end io function. The dec page countsbi, type function can reduce the F2FS WB CP DATA counter to zero, which may unblock f2fs wait...

Unity Linux 20.1070a Security Update: kernel (UTSA-2026-014303)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-014303 advisory. In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid potential deadlock As Jiaming Zhang and syzbot reported, there is potential...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-014301)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-014301 advisory. In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid potential deadlock Using f2fstrylockop in f2fswritecompressedpages to avoid...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-013561)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013561 advisory. In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on summary info As Wenqing Liu reported in bugzilla:...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-013870)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013870 advisory. In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid potential deadlock Using f2fstrylockop in f2fswritecompressedpages to avoid...