Vulnerability in Kernel (CVE-2022-50456)

Summary

Vulnerability in Kernel (CVE-2022-50456). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 5.4.229, 5.10.163, 5.15.87, 6.0.18, 6.1.4 or later.

Original description

The description as published by the source.

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

btrfs: fix resolving backrefs for inline extent followed by prealloc

If a file consists of an inline extent followed by a regular or prealloc
extent, then a legitimate attempt to resolve a logical address in the
non-inline region will result in add_all_parents reading the invalid
offset field of the inline extent. If the inline extent item is placed
in the leaf eb s.t. it is the first item, attempting to access the
offset field will not only be meaningless, it will go past the end of
the eb and cause this panic:

[17.626048] BTRFS warning (device dm-2): bad eb member end: ptr 0x3fd4 start 30834688 member offset 16377 size 8
[17.631693] general protection fault, probably for non-canonical address 0x5088000000000: 0000 [#1] SMP PTI
[17.635041] CPU: 2 PID: 1267 Comm: btrfs Not tainted 5.12.0-07246-g75175d5adc74-dirty #199
[17.637969] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[17.641995] RIP: 0010:btrfs_get_64+0xe7/0x110
[17.649890] RSP: 0018:ffffc90001f73a08 EFLAGS: 00010202
[17.651652] RAX: 0000000000000001 RBX: ffff88810c42d000 RCX: 0000000000000000
[17.653921] RDX: 0005088000000000 RSI: ffffc90001f73a0f RDI: 0000000000000001
[17.656174] RBP: 0000000000000ff9 R08: 0000000000000007 R09: c0000000fffeffff
[17.658441] R10: ffffc90001f73790 R11: ffffc90001f73788 R12: ffff888106afe918
[17.661070] R13: 0000000000003fd4 R…

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-2022-50456 has been found in Kernel.
Risk of unauthorized operations or information disclosure.
What to do: upgrade Kernel to 5.4.229, 5.10.163, 5.15.87, 6.0.18, 6.1.4 or later.
If unsure, ask your IT team or search "Kernel CVE-2022-50456" on the vendor's site.

CVE-2022-50456 (Kernel)
Patched: 5.4.229, 5.10.163, 5.15.87, 6.0.18, 6.1.4 — 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 5.4.229, 5.10.163, 5.15.87, 6.0.18, 6.1.4.

🛡️ 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 5.4.229, 5.10.163, 5.15.87, 6.0.18, 6.1.4
```
ステージング環境で 5.4.229, 5.10.163, 5.15.87, 6.0.18, 6.1.4 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":"3.3.0"},{"fixed":"5.4.229"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.163"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.87"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.0.18"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.1.0"},{"fixed":"6.1.4"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2022-50456 linux Fixed in: 5.10.178-1
Ubuntu UBUNTU-CVE-2022-50456 linux