Vulnerability in Kernel (CVE-2025-71194)

Summary

Vulnerability in Kernel (CVE-2025-71194). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7 or later.

Original description

The description as published by the source.

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

btrfs: fix deadlock in wait_current_trans() due to ignored transaction type

When wait_current_trans() is called during start_transaction(), it
currently waits for a blocked transaction without considering whether
the given transaction type actually needs to wait for that particular
transaction state. The btrfs_blocked_trans_types[] array already defines
which transaction types should wait for which transaction states, but
this check was missing in wait_current_trans().

This can lead to a deadlock scenario involving two transactions and
pending ordered extents:

Transaction A is in TRANS_STATE_COMMIT_DOING state
A worker processing an ordered extent calls start_transaction()
with TRANS_JOIN
join_transaction() returns -EBUSY because Transaction A is in
TRANS_STATE_COMMIT_DOING
Transaction A moves to TRANS_STATE_UNBLOCKED and completes
A new Transaction B is created (TRANS_STATE_RUNNING)
The ordered extent from step 2 is added to Transaction B's
pending ordered extents
Transaction B immediately starts commit by another task and
enters TRANS_STATE_COMMIT_START
The worker finally reaches wait_current_trans(), sees Transaction B
in TRANS_STATE_COMMIT_START (a blocked state), and waits
unconditionally
However, TRANS_JOIN should NOT wait for TRANS_STATE_COMMIT_START
according to btrfs_blocked_trans_types[]
Transaction B…

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-2025-71194 has been found in Kernel.
Risk of unauthorized operations or information disclosure.
What to do: upgrade Kernel to 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7 or later.
If unsure, ask your IT team or search "Kernel CVE-2025-71194" on the vendor's site.

CVE-2025-71194 (Kernel)
Patched: 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7 — 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 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7.

🛡️ 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 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7
```
ステージング環境で 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7 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":"3.11.0"},{"fixed":"5.10.249"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.199"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.162"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.122"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.67"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.7"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

BellSoft Alpaquita BELL-CVE-2025-71194 linux-lts Fixed in: 6.1.163-r0
Debian DEBIAN-CVE-2025-71194 linux Fixed in: 5.10.249-1
Ubuntu UBUNTU-CVE-2025-71194 linux