Vulnerability in Kernel (CVE-2025-37955)

Summary

Vulnerability in Kernel (CVE-2025-37955). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 6.12.29, 6.14.7 or later.

Original description

The description as published by the source.

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

virtio-net: free xsk_buffs on error in virtnet_xsk_pool_enable()

The selftests added to our CI by Bui Quang Minh recently reveals
that there is a mem leak on the error path of virtnet_xsk_pool_enable():

unreferenced object 0xffff88800a68a000 (size 2048):
comm "xdp_helper", pid 318, jiffies 4294692778
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 0):
__kvmalloc_node_noprof+0x402/0x570
virtnet_xsk_pool_enable+0x293/0x6a0 (drivers/net/virtio_net.c:5882)
xp_assign_dev+0x369/0x670 (net/xdp/xsk_buff_pool.c:226)
xsk_bind+0x6a5/0x1ae0
__sys_bind+0x15e/0x230
__x64_sys_bind+0x72/0xb0
do_syscall_64+0xc1/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f

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-2025-37955 has been found in Kernel.
Risk of unauthorized operations or information disclosure.
What to do: upgrade Kernel to 6.12.29, 6.14.7 or later.
If unsure, ask your IT team or search "Kernel CVE-2025-37955" on the vendor's site.

CVE-2025-37955 (Kernel)
Patched: 6.12.29, 6.14.7 — 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 6.12.29, 6.14.7.

🛡️ 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 6.12.29, 6.14.7
```
ステージング環境で 6.12.29, 6.14.7 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":"6.11.0"},{"fixed":"6.12.29"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.14.7"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

BellSoft Alpaquita BELL-CVE-2025-37955 linux-lts Fixed in: 6.12.41-r0
Debian DEBIAN-CVE-2025-37955 linux Fixed in: 6.12.29-1
Ubuntu UBUNTU-CVE-2025-37955 linux-hwe-edge