Vulnerability in Kernel (CVE-2023-53217)

Summary

Vulnerability in Kernel (CVE-2023-53217). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 5.10.188, 5.15.120, 6.1.38, 6.3.12, 6.4.2 or later.

Original description

The description as published by the source.

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

nubus: Partially revert proc_create_single_data() conversion

The conversion to proc_create_single_data() introduced a regression
whereby reading a file in /proc/bus/nubus results in a seg fault:

# grep -r . /proc/bus/nubus/e/
Data read fault at 0x00000020 in Super Data (pc=0x1074c2)
BAD KERNEL BUSERR
Oops: 00000000
Modules linked in:
PC: [<001074c2>] PDE_DATA+0xc/0x16
SR: 2010  SP: 38284958  a2: 01152370
d0: 00000001    d1: 01013000    d2: 01002790    d3: 00000000
d4: 00000001    d5: 0008ce2e    a0: 00000000    a1: 00222a40
Process grep (pid: 45, task=142f8727)
Frame format=B ssw=074d isc=2008 isb=4e5e daddr=00000020 dobuf=01199e70
baddr=001074c8 dibuf=ffffffff ver=f
Stack from 01199e48:
    01199e70 00222a58 01002790 00000000 011a3000 01199eb0 015000c0 00000000
    00000000 01199ec0 01199ec0 000d551a 011a3000 00000001 00000000 00018000
    d003f000 00000003 00000001 0002800d 01052840 01199fa8 c01f8000 00000000
    00000029 0b532b80 00000000 00000000 00000029 0b532b80 01199ee4 00103640
    011198c0 d003f000 00018000 01199fa8 00000000 011198c0 00000000 01199f4c
    000b3344 011198c0 d003f000 00018000 01199fa8 00000000 00018000 011198c0
Call Trace: [<00222a58>] nubus_proc_rsrc_show+0x18/0xa0
 [<000d551a>] seq_read+0xc4/0x510
 [<00018000>] fp_fcos+0x2/0x82
 [<0002800d>] __sys_setreuid+0x115/0x1c6
 [<00103640>] proc_reg_read+0x5c/0xb…

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-2023-53217 has been found in Kernel.
Successful exploitation can lead to full system takeover.
What to do: upgrade Kernel to 5.10.188, 5.15.120, 6.1.38, 6.3.12, 6.4.2 or later.
If unsure, ask your IT team or search "Kernel CVE-2023-53217" on the vendor's site.

CVE-2023-53217 (Kernel)
Attack vector: local / no user interaction
Patched: 5.10.188, 5.15.120, 6.1.38, 6.3.12, 6.4.2 — 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: ?. Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 5.10.188, 5.15.120, 6.1.38, 6.3.12, 6.4.2.

🛡️ 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 5.10.188, 5.15.120, 6.1.38, 6.3.12, 6.4.2
```
ステージング環境で 5.10.188, 5.15.120, 6.1.38, 6.3.12, 6.4.2 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":"4.18.0"},{"fixed":"5.10.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.120"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.38"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.3.12"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.4.0"},{"fixed":"6.4.2"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2023-53217 linux Fixed in: 5.10.191-1
Ubuntu UBUNTU-CVE-2023-53217 linux-hwe-edge