Vulnerability in Kernel (CVE-2022-48691)

Summary

Vulnerability in Kernel (CVE-2022-48691). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 5.10.143, 5.15.68, 5.19.9 or later.

Original description

The description as published by the source.

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

netfilter: nf_tables: clean up hook list when offload flags check fails

splice back the hook list so nft_chain_release_hook() has a chance to
release the hooks.

BUG: memory leak
unreferenced object 0xffff88810180b100 (size 96):
comm "syz-executor133", pid 3619, jiffies 4294945714 (age 12.690s)
hex dump (first 32 bytes):
28 64 23 02 81 88 ff ff 28 64 23 02 81 88 ff ff (d#.....(d#.....
90 a8 aa 83 ff ff ff ff 00 00 b5 0f 81 88 ff ff ................
backtrace:
[] kmalloc include/linux/slab.h:600 [inline]
[] nft_netdev_hook_alloc+0x3b/0xc0 net/netfilter/nf_tables_api.c:1901
[] nft_chain_parse_netdev net/netfilter/nf_tables_api.c:1998 [inline]
[] nft_chain_parse_hook+0x33a/0x530 net/netfilter/nf_tables_api.c:2073
[] nf_tables_addchain.constprop.0+0x10b/0x950 net/netfilter/nf_tables_api.c:2218
[] nf_tables_newchain+0xa8b/0xc60 net/netfilter/nf_tables_api.c:2593
[] nfnetlink_rcv_batch+0xa46/0xd20 net/netfilter/nfnetlink.c:517
[] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:638 [inline]
[] nfnetlink_rcv+0x1f9/0x220 net/netfilter/nfnetlink.c:656
[] netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
[] netlink_unicast+0x397/0x4c0 net/netlink/af_netlink.c:1345
[] netlink_sendmsg+0x396/0x710 net/netlink/af_netlink.c:1921
[] sock_sendmsg_nosec net/socket.c:714 [inline]
[] sock_sendmsg+0x56/0x80 net/socket.c:734
[] ____sys_sendm…

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-2022-48691 has been found in Kernel.
Risk of unauthorized operations or information disclosure.
What to do: upgrade Kernel to 5.10.143, 5.15.68, 5.19.9 or later.
If unsure, ask your IT team or search "Kernel CVE-2022-48691" on the vendor's site.

CVE-2022-48691 (Kernel)
Attack vector: local / no user interaction
Patched: 5.10.143, 5.15.68, 5.19.9 — 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 5.10.143, 5.15.68, 5.19.9.

🛡️ 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 5.10.143, 5.15.68, 5.19.9
```
ステージング環境で 5.10.143, 5.15.68, 5.19.9 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":"5.5.0"},{"fixed":"5.10.143"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.68"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"5.19.9"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2022-48691 linux Fixed in: 5.10.148-1