CVE-2026-89835

A flaw was found in the Linux kernel's f2fs filesystem. This vulnerability occurs when the checkpointmerge feature is enabled without an active checkpoint merge thread, such as during a read-only mount. A local attacker with write access to ckptthreadioprio through sysfs could trigger a null...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: f2fs: compress: fixed the issue to cover normal cluster writes using cprwsem. When we overwrite a compressed cluster with a normal cluster, we should not unlock cprwsem during f2fswriterawpages. Otherwise, data will be corrupted ...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: f2fs: use global inlinexattrslab instead of per-sb slab cache As Hong Yun reported in mailing list: loop7: detected capacity change from 0 to 131072 ------------ cut here ------------ kmemcache of name 'f2fsxattrentry-7:7' alread...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: f2fs: quota: fixed the loop condition in f2fsquotasync The parameter cnt should be passed to sbhasquotaactive, rather than type, to correctly check the active quota. Moreover, when the type is -1, the compiler, with sufficient...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: f2fs: A fix was made to avoid potential memory corruption in updateiostatlatency. A sanity check for iotype was added to prevent potential memory corruption. This addresses the compile error below: fs/f2fs/iostat.c:231...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: f2fs: Validated the sizes of ACL entries in f2fsaclfromdisk. f2fsaclcount only validates the aggregate ACL xattr length. A malformed ACL can still place ACLUSER or ACLGROUP in a slot that only contains struct f2fsaclentryshort...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: f2fs: fixed the issue of clearing dirty inodes in f2fsevictinode. As reported by Yanming in Bugzilla: https://bugzilla.kernel.org/showbug.cgi?id=215904 The kernel message is as follows: Kernel BUG at fs/f2fs/inode.c:825! Call...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: f2fs: A fix was made to avoid using f2fsbugon in f2fsnewnodepage. As reported by Dipanjan Das , syzkaller discovered a bug in f2fs as follows: RIP: 0010:f2fsnewnodepage+0x19ac/0x1fc0 fs/f2fs/node.c:1295 Call Trace: writeallxattrs...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: f2fs: fixed to avoid out-of-boundary access in devs.path - touch /mnt/f2fs/012345678901234567890123456789012345678901234567890123 - truncate -s $102410241024 \ /mnt/f2fs/012345678901234567890123456789012345678901234567890123 -...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerabilities have been resolved: f2fs: fixed to avoid dirent corruption As Al reported in link 1: f2fsrename … if olddir != newdir && !whiteout f2fssetlinkoldinode, olddirentry, olddirpage, newdir; else f2fsputpageolddirpage, 0; You need the correct inumber i...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: f2fs: A sanity check was added for the block address in the f2fsdozerorange function. As reported by Yanming in Bugzilla: https://bugzilla.kernel.org/showbug.cgi?id=215894 I have encountered a bug in the F2FS file system in the...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: “Revert ‘f2fs: fix to do sanity check on extent cache correctly’” The syzbot reports a bug in f2fs as follows: UBSAN: Array-index-out-of-bounds in fs/f2fs/f2fs.h:3275:19 Index 1409 is out of range for type ‘le32923’ aka ‘unsigned...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: f2fs: Protection of the extensionlist read operation was added by using sblock in f2fssbishow. In f2fssbishow, the extensionlist, extensioncount, and hotextcount are read without holding the sbi-sblock. If a concurrent sysfs stor...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: f2fs: compress: Fixed an error in counting reservedcblocks when there is no space available. When a file requires only one directnode, performing the following operations will cause the file to become unrecoverable: bash unisoc...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: f2fs: Fix for use-after-free of sbi in f2fscompresswriteendio In f2fscompresswriteendio, the call to decpagecountsbi, type can set the F2FSWBCPDATA counter to zero, thereby unblocking f2fswaitonallpages in f2fsputsuper during a...

Astra Linux – Vulnerability in Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: f2fs: A sanity check was added for the F2FSInlineDATA flag in the inode during garbage collection GC. The syzbot reports the following f2fs bug: ------------ Cut here ------------ Kernel BUG: At fs/f2fs/inline.c:258 CPU: 1 PID: 3...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: f2fs: Initialization of locks is performed earlier in f2fsfillsuper. syzbot reports a lockdep warning at f2fshandleerror 1. The call to spinlock&sbi-errorlock occurs before spinlockinit is called. To ensure safe locking during...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: f2fs: fixed the UAF issue in f2fsmergepagebio As reported by JY in bugzilla 1, It is unable to handle the kernel’s NULL pointer dereferencing at the virtual address 0000000000000000. PC: 0xffffffe51d249484...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: f2fs: fixed the sanity check on sbi-totalvalidblockcount. syzbot reported a f2fs bug as follows: ------------ cut here ------------ Kernel BUG at fs/f2fs/f2fs.h:2521! RIP: 0010:decvalidblockcount+0x3b2/0x3c0 fs/f2fs/f2fs.h:2521...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: f2fs: Fix to correctly check the readonly condition. In the following case, it is possible to mount a multi-device image with the rw option. However, if one of the secondary devices is set as ro, subsequent updates will cause a...