Vulnerability in Kernel (CVE-2022-49853)

Summary

Vulnerability in Kernel (CVE-2022-49853). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.155, 5.15.79, 6.0.9 or later.

Original description

The description as published by the source.

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

net: macvlan: fix memory leaks of macvlan_common_newlink

kmemleak reports memory leaks in macvlan_common_newlink, as follows:

ip link add link eth0 name .. type macvlan mode source macaddr add

kmemleak reports:

unreferenced object 0xffff8880109bb140 (size 64):
comm "ip", pid 284, jiffies 4294986150 (age 430.108s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 b8 aa 5a 12 80 88 ff ff ..........Z.....
80 1b fa 0d 80 88 ff ff 1e ff ac af c7 c1 6b 6b ..............kk
backtrace:
[] kmem_cache_alloc_trace+0x1c7/0x300
[] macvlan_hash_add_source+0x45/0xc0
[] macvlan_changelink_sources+0xd7/0x170
[] macvlan_common_newlink+0x38c/0x5a0
[] macvlan_newlink+0xe/0x20
[] __rtnl_newlink+0x7af/0xa50
[] rtnl_newlink+0x48/0x70
...

In the scenario where the macvlan mode is configured as 'source',
macvlan_changelink_sources() will be execured to reconfigure list of
remote source mac addresses, at the same time, if register_netdevice()
return an error, the resource generated by macvlan_changelink_sources()
is not cleaned up.

Using this patch, in the case of an error, it will execute
macvlan_flush_sources() to ensure that the resource is cleaned up.

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-2022-49853 has been found in Kernel.
Risk of unauthorized operations or information disclosure.
What to do: upgrade Kernel to 4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.155, 5.15.79, 6.0.9 or later.
If unsure, ask your IT team or search "Kernel CVE-2022-49853" on the vendor's site.

CVE-2022-49853 (Kernel)
Attack vector: local / no user interaction
Patched: 4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.155, 5.15.79, 6.0.9 — 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 4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.155, 5.15.79, 6.0.9.

🛡️ 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 4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.155, 5.15.79, 6.0.9
```
ステージング環境で 4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.155, 5.15.79, 6.0.9 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":"4.9.0"},{"fixed":"4.9.334"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.10.0"},{"fixed":"4.14.300"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.267"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.225"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.155"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.79"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.0.9"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2022-49853 linux Fixed in: 5.10.158-1
Ubuntu UBUNTU-CVE-2022-49853 linux-azure Fixed in: 4.15.0-1162.177~14.04.1