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High 7.3

Vulnerability in Kernel

CVE-2026-63914 First seen on SecPulse

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-2026-63914 has been found in Kernel.
Confidential information can be exposed externally. CVSS score: 7.3/10.
What to do: upgrade Kernel to 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12 or later.
If unsure, ask your IT team or search "Kernel CVE-2026-63914" on the vendor's site.

CVE-2026-63914 (Kernel) — CWE-862 / CVSS v3 7.3
Attack vector: local / no user interaction
Patched: 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12 — 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 (CWE-862) exists in Kernel.

Affected scope

Check the vendor advisory for the affected versions of Kernel.

Severity

Severity: High (CVSS 7.3/10). Confidential information can be exposed externally.

How to fix

Update to 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12.

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. 1
    Identify exposureidentify
    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. 2
    Apply patchpatch
    Upgrade Kernel to 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12

    ステージング環境で 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12 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. 3
    Post-deployment verificationverify
    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

EcosystemPackageAffectedFixed
Linux Kernel
≥ 2.6.21, < 5.10.259
≥ 5.11.0, < 5.15.210
≥ 5.16.0, < 6.1.176
≥ 6.2.0, < 6.6.143
≥ 6.7.0, < 6.12.93
≥ 6.13.0, < 6.18.35
+1 more
5.10.259
5.15.210
6.1.176
6.6.143
6.12.93
6.18.35

Fix status by distribution

Fixed packages published by each distribution for this CVE

Original description The description as published by the source.

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

xfrm: route MIGRATE notifications to caller's netns

xfrm_send_migrate() in net/xfrm/xfrm_user.c and pfkey_send_migrate()
in net/key/af_key.c both hardcode &init_net for the multicast that
announces a successful XFRM_MSG_MIGRATE / SADB_X_MIGRATE.

XFRM_MSG_MIGRATE arrives on a per-netns NETLINK_XFRM socket, and the
rest of the xfrm/af_key netlink path was made netns-aware in 2008.
The other 14 multicast paths in xfrm_user.c route their event using
xs_net(x), xp_net(xp) or sock_net(skb->sk); only the migrate path
was missed.

Two consequences of the init_net hardcoding:

  1. The notification (selector, old/new endpoint addresses, and the
    km_address) is delivered to listeners on init_net's
    XFRMNLGRP_MIGRATE / pfkey BROADCAST_ALL groups rather than on
    the issuing netns. An IKE daemon running in init_net therefore
    receives migration notifications originating from any other
    netns on the host.

  2. An IKE daemon running inside a non-init netns and subscribed
    to its own XFRMNLGRP_MIGRATE / pfkey groups never receives the
    notification of its own migration. IKEv2 MOBIKE / address-update
    handling inside a netns is silently broken.

Thread struct net through km_migrate() and the xfrm_mgr.migrate
function pointer, drop the &init_net override in xfrm_send_migrate()
and pfkey_send_migrate(), and pass the caller's net (already in
scope in xfrm_migrate() via sock_net(skb->sk)) all t…

Source: NIST National Vulnerability Database NVD GitHub Advisory

References

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