Vulnerability in Kernel (CVE-2023-52518)

Summary

Vulnerability in Kernel (CVE-2023-52518). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 6.1.57, 6.5.7 or later.

Original description

The description as published by the source.

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

Bluetooth: hci_codec: Fix leaking content of local_codecs

The following memory leak can be observed when the controller supports
codecs which are stored in local_codecs list but the elements are never
freed:

unreferenced object 0xffff88800221d840 (size 32):
comm "kworker/u3:0", pid 36, jiffies 4294898739 (age 127.060s)
hex dump (first 32 bytes):
f8 d3 02 03 80 88 ff ff 80 d8 21 02 80 88 ff ff ..........!.....
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[] __kmalloc+0x47/0x120
[] hci_codec_list_add.isra.0+0x2d/0x160
[] hci_read_codec_capabilities+0x183/0x270
[] hci_read_supported_codecs+0x1bb/0x2d0
[] hci_read_local_codecs_sync+0x3e/0x60
[] hci_dev_open_sync+0x943/0x11e0
[] hci_power_on+0x10d/0x3f0
[] process_one_work+0x404/0x800
[] worker_thread+0x374/0x670
[] kthread+0x188/0x1c0
[] ret_from_fork+0x2b/0x50
[] ret_from_fork_asm+0x1a/0x30

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-2023-52518 has been found in Kernel.
Risk of unauthorized operations or information disclosure.
What to do: upgrade Kernel to 6.1.57, 6.5.7 or later.
If unsure, ask your IT team or search "Kernel CVE-2023-52518" on the vendor's site.

CVE-2023-52518 (Kernel)
Attack vector: local / no user interaction
Patched: 6.1.57, 6.5.7 — 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 6.1.57, 6.5.7.

🛡️ 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 6.1.57, 6.5.7
```
ステージング環境で 6.1.57, 6.5.7 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":"5.16.0"},{"fixed":"6.1.57"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.5.7"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2023-52518 linux Fixed in: 6.1.64-1