CVE-2026-31714

f2fs: fix to avoid memory leak in f2fs_rename()

State: Published
Severity: Not scored
Published: May 1, 2026
Updated: Jun 14, 2026
Reserved: Mar 9, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

f2fs: fix to avoid memory leak in f2fs_rename()

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 5b e6 8f ad 6e 8e fd 33 42 39 03 ff <.Wr[...n..3B9.. backtrace (crc 925f8a80): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4520 [inline] slab_alloc_node mm/slub.c:4844 [inline] __do_kmalloc_node mm/slub.c:5237 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250 kmalloc_noprof include/linux/slab.h:954 [inline] fscrypt_setup_filename+0x15e/0x3b0 fs/crypto/fname.c:364 f2fs_setup_filename+0x52/0xb0 fs/f2fs/dir.c:143 f2fs_rename+0x159/0xca0 fs/f2fs/namei.c:961 f2fs_rename2+0xd5/0xf20 fs/f2fs/namei.c:1308 vfs_rename+0x7ff/0x1250 fs/namei.c:6026 filename_renameat2+0x4f4/0x660 fs/namei.c:6144 __do_sys_renameat2 fs/namei.c:6173 [inline] __se_sys_renameat2 fs/namei.c:6168 [inline] __x64_sys_renameat2+0x59/0x80 fs/namei.c:6168 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The root cause is in commit 40b2d55e0452 ("f2fs: fix to create selinux label during whiteout initialization"), we added a call to f2fs_setup_filename() without a matching call to f2fs_free_filename(), fix it.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	7525dec4b34c80b3015c3f2ac143fd2bfc1febc3 to before a76c1cad4e80a9802ef8048662255417e3ce5b79Affected 40b2d55e045222dd6de2a54a299f682e0f954b03 to before c78206dcb912ab60b8ee3cbe8c48d749a9a12e1eAffected 40b2d55e045222dd6de2a54a299f682e0f954b03 to before 047c0aef6af37a2a35181aa085c616ad286386f1Affected 40b2d55e045222dd6de2a54a299f682e0f954b03 to before 369eb2016d8e2f01931b3bad1cb9cefa83f44003Affected 40b2d55e045222dd6de2a54a299f682e0f954b03 to before 3cf11e6f36c170050c12171dd6fd3142711478fcAffected 1d1b89c9846e6a550eca3d2ce9323fb591e4f321Affected 64582cc5357cd984724cfb0835b4a34d9c279d31Affected 6.6.23 to before 6.6.136Affected 6.7.11 to before 6.8Affected 6.8.2 to before 6.9Affected
LinuxLinux	6.9Affected before 6.9Not affected 6.6.136 through 6.6.Not affected 6.12.84 through 6.12.Not affected 6.18.25 through 6.18.Not affected 7.0.2 through 7.0.Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

7525dec4b34c80b3015c3f2ac143fd2bfc1febc3 to before a76c1cad4e80a9802ef8048662255417e3ce5b79Affected
40b2d55e045222dd6de2a54a299f682e0f954b03 to before c78206dcb912ab60b8ee3cbe8c48d749a9a12e1eAffected
40b2d55e045222dd6de2a54a299f682e0f954b03 to before 047c0aef6af37a2a35181aa085c616ad286386f1Affected
40b2d55e045222dd6de2a54a299f682e0f954b03 to before 369eb2016d8e2f01931b3bad1cb9cefa83f44003Affected
40b2d55e045222dd6de2a54a299f682e0f954b03 to before 3cf11e6f36c170050c12171dd6fd3142711478fcAffected
1d1b89c9846e6a550eca3d2ce9323fb591e4f321Affected
64582cc5357cd984724cfb0835b4a34d9c279d31Affected
6.6.23 to before 6.6.136Affected
6.7.11 to before 6.8Affected
6.8.2 to before 6.9Affected

LinuxLinux

6.9Affected
before 6.9Not affected
6.6.136 through 6.6.*Not affected
6.12.84 through 6.12.*Not affected
6.18.25 through 6.18.*Not affected
7.0.2 through 7.0.*Not affected
7.1 and laterNot affected

References

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