5.5

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

Analyzed
AliasesUBUNTU-CVE-2026-31714DEBIAN-CVE-2026-31714CGA-56vx-fj4q-fv58
Published 01-05-2026Last modified 14-06-2026

Vulnerability summary

CVE-2026-31714 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.11%
0%100%
Low · -0.05 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 22 · Related 21
MGASA-2026-0108MGASA-2026-0110OPENSUSE-SU-2026:10793-1USN-8488-1USN-8488-2USN-8507-1

Timeline

  1. 01-05-2026
    PublishedVulnerability first disclosed.
  2. 14-06-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.11%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

Decrease -0.05 pp

From 0.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu131 products
  • linux< 6.8.0-136.136 | All versions (No fix recorded) | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1061.64 | All versions (No fix recorded) | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard6 products
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.18< 6.18.24-r1 | < 6.18.31-r0
  • linux-gcp-6.18< 6.18.31-r0
  • linux-qemu-6.18< 6.18.24-r3
  • linux-qemu-rc< 7.1_rc3-r0
Linux2 products
  • linux≥ 7525dec4b34c80b3015c3f2ac143fd2bfc1febc3, < a76c1cad4e80a9802ef8048662255417e3ce5b79 | ≥ 40b2d55e045222dd6de2a54a299f682e0f954b03, < c78206dcb912ab60b8ee3cbe8c48d749a9a12e1e | ≥ 40b2d55e045222dd6de2a54a299f682e0f954b03, < 047c0aef6af37a2a35181aa085c616ad286386f1 | ≥ 40b2d55e045222dd6de2a54a299f682e0f954b03, < 369eb2016d8e2f01931b3bad1cb9cefa83f44003 | ≥ 40b2d55e045222dd6de2a54a299f682e0f954b03, < 3cf11e6f36c170050c12171dd6fd3142711478fc | 1d1b89c9846e6a550eca3d2ce9323fb591e4f321 | 64582cc5357cd984724cfb0835b4a34d9c279d31 | ≥ 6.6.23, < 6.6.136 | ≥ 6.7.11, < 6.8 | ≥ 6.8.2, < 6.9 | 6.9
  • linux_kernel≥ 6.6.23, < 6.6.136 | ≥ 6.7.11, < 6.8 | ≥ 6.8.2, < 6.9 | ≥ 6.9, < 6.12.84 | ≥ 6.13, < 6.18.25 | ≥ 6.19, < 7.0.2 | 7.1:rc1
Debian1 product
  • linux< 6.12.85-1 | < 7.0.3-1

4 vendors · 140 products

References

28 links
Show all 28 references