Vulnerability in Kernel (CVE-2026-23078)

Summary

Vulnerability in Kernel (CVE-2026-23078). Risk of unauthorized operations or information disclosure. Exploitable via size. Mitigation: upgrade to 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8 or later.

Original description

The description as published by the source.

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

ALSA: scarlett2: Fix buffer overflow in config retrieval

The scarlett2_usb_get_config() function has a logic error in the
endianness conversion code that can cause buffer overflows when
count > 1.

The code checks if (size == 2) where size is the total buffer size in
bytes, then loops count times treating each element as u16 (2 bytes).
This causes the loop to access count * 2 bytes when the buffer only
has size bytes allocated.

Fix by checking the element size (config_item->size) instead of the
total buffer size. This ensures the endianness conversion matches the
actual element type.

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-2026-23078 has been found in Kernel.
Attackers can target a specific entry point like size over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade Kernel to 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8 or later.
If unsure, ask your IT team or search "Kernel CVE-2026-23078" on the vendor's site.

CVE-2026-23078 (Kernel)
Attack surface: size / count
Patched: 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8 — 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. Attackers reach the vulnerable code path via size.

📍 Affected scope

Check the vendor advisory for the affected versions of Kernel. Attack surface: size / count.

🔥 Severity

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

🔧 How to fix

Update to 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8.

🛡️ 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 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8
```
ステージング環境で 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8 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":"5.14.0"},{"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":"6.12.68"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.8"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

BellSoft Alpaquita BELL-CVE-2026-23078 linux-lts Fixed in: 6.1.163-r0
Debian DEBIAN-CVE-2026-23078 linux Fixed in: 6.1.162-1
Ubuntu UBUNTU-CVE-2026-23078 linux-hwe-edge