Vulnerability in Kernel (CVE-2022-49685)

Summary

Vulnerability in Kernel (CVE-2022-49685). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 4.9.321, 4.14.286, 4.19.250, 5.4.202, 5.10.127, 5.15.51, 5.18.8 or later.

Original description

The description as published by the source.

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

iio: trigger: sysfs: fix use-after-free on remove

Ensure that the irq_work has completed before the trigger is freed.

==================================================================
BUG: KASAN: use-after-free in irq_work_run_list
Read of size 8 at addr 0000000064702248 by task python3/25

Call Trace:
irq_work_run_list
irq_work_tick
update_process_times
tick_sched_handle
tick_sched_timer
__hrtimer_run_queues
hrtimer_interrupt

Allocated by task 25:
kmem_cache_alloc_trace
iio_sysfs_trig_add
dev_attr_store
sysfs_kf_write
kernfs_fop_write_iter
new_sync_write
vfs_write
ksys_write
sys_write

Freed by task 25:
kfree
iio_sysfs_trig_remove
dev_attr_store
sysfs_kf_write
kernfs_fop_write_iter
new_sync_write
vfs_write
ksys_write
sys_write

==================================================================

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-2022-49685 has been found in Kernel.
Successful exploitation can lead to full system takeover.
What to do: upgrade Kernel to 4.9.321, 4.14.286, 4.19.250, 5.4.202, 5.10.127, 5.15.51, 5.18.8 or later.
If unsure, ask your IT team or search "Kernel CVE-2022-49685" on the vendor's site.

CVE-2022-49685 (Kernel)
Attack vector: local / no user interaction
Patched: 4.9.321, 4.14.286, 4.19.250, 5.4.202, 5.10.127, 5.15.51, 5.18.8 — 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.

📍 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 4.9.321, 4.14.286, 4.19.250, 5.4.202, 5.10.127, 5.15.51, 5.18.8.

🛡️ 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 4.9.321, 4.14.286, 4.19.250, 5.4.202, 5.10.127, 5.15.51, 5.18.8
```
ステージング環境で 4.9.321, 4.14.286, 4.19.250, 5.4.202, 5.10.127, 5.15.51, 5.18.8 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":"3.7.0"},{"fixed":"4.9.321"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.10.0"},{"fixed":"4.14.286"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.250"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.202"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.127"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"5.18.8"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2022-49685 linux Fixed in: 5.10.127-1
Ubuntu UBUNTU-CVE-2022-49685 linux-azure Fixed in: 4.15.0-1153.168~14.04.1