Vulnerability in Kernel (CVE-2025-68772)

Summary

Vulnerability in Kernel (CVE-2025-68772). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 6.1.160, 6.6.120, 6.12.64, 6.18.3 or later.

Original description

The description as published by the source.

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

f2fs: fix to avoid updating compression context during writeback

Bai, Shuangpeng reported a bug as below:

Oops: divide error: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 11441 Comm: syz.0.46 Not tainted 6.17.0 #1 PREEMPT(full)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
RIP: 0010:f2fs_all_cluster_page_ready+0x106/0x550 fs/f2fs/compress.c:857
Call Trace:

f2fs_write_cache_pages fs/f2fs/data.c:3078 [inline]
__f2fs_write_data_pages fs/f2fs/data.c:3290 [inline]
f2fs_write_data_pages+0x1c19/0x3600 fs/f2fs/data.c:3317
do_writepages+0x38e/0x640 mm/page-writeback.c:2634
filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
__filemap_fdatawrite_range mm/filemap.c:419 [inline]
file_write_and_wait_range+0x2ba/0x3e0 mm/filemap.c:794
f2fs_do_sync_file+0x6e6/0x1b00 fs/f2fs/file.c:294
generic_write_sync include/linux/fs.h:3043 [inline]
f2fs_file_write_iter+0x76e/0x2700 fs/f2fs/file.c:5259
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7e9/0xe00 fs/read_write.c:686
ksys_write+0x19d/0x2d0 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf7/0x470 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f

The bug was triggered w/ below race condition:

fsync setattr ioctl

f2fs_do_sync_file
file_write_and_wait_range
f2fs_write_cache_pages
: inode is non-compressed
: cc.cluster_size =
F2FS_I(in…

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2025-68772 has been found in Kernel.
Risk of unauthorized operations or information disclosure.
What to do: upgrade Kernel to 6.1.160, 6.6.120, 6.12.64, 6.18.3 or later.
If unsure, ask your IT team or search "Kernel CVE-2025-68772" on the vendor's site.

CVE-2025-68772 (Kernel)
Patched: 6.1.160, 6.6.120, 6.12.64, 6.18.3 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (unclassified) exists in Kernel.

📍 Affected scope

Check the vendor advisory for the affected versions of Kernel.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 6.1.160, 6.6.120, 6.12.64, 6.18.3.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Kernel' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
grep -r 'Kernel' . | grep -v node_modules
```
リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で Kernel を grep し、稼働しているサービス・バージョンを把握する。
2
Apply patch patch
```
Upgrade Kernel to 6.1.160, 6.6.120, 6.12.64, 6.18.3
```
ステージング環境で 6.1.160, 6.6.120, 6.12.64, 6.18.3 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
3
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

Linux Kernel

[{"type":"ECOSYSTEM","events":[{"introduced":"5.6.0"},{"fixed":"6.1.160"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.120"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.64"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.3"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

BellSoft Alpaquita BELL-CVE-2025-68772 linux-lts Fixed in: 6.1.161-r0
Debian DEBIAN-CVE-2025-68772 linux
Ubuntu UBUNTU-CVE-2025-68772 linux-hwe-edge