This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-64459 →

UBUNTU-CVE-2026-64459

Vulnerability in linux-hwe-edge (UBUNTU-CVE-2026-64459)

Summary

Vulnerability in linux-hwe-edge (UBUNTU-CVE-2026-64459). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 7.0.0-1012.12~24.04.1 or later.

Original description

The description as published by the source.

In the Linux kernel, the following vulnerability has been resolved: tcp: restore RCU grace period in tcp_ao_destroy_sock Commit 51e547e8c89c ("tcp: Free TCP-AO/TCP-MD5 info/keys without RCU") removed the call_rcu() callback from tcp_ao_destroy_sock(), arguing that "the destruction of info/keys is delayed until the socket destructor" and therefore "no one can discover it anymore". That argument does not hold for the call site in tcp_connect() (net/ipv4/tcp_output.c:4327-4332). At that point the socket is in TCP_SYN_SENT, has already been inserted into the inet ehash by inet_hash_connect() in tcp_v4_connect(), and is therefore very much discoverable: any softirq running tcp_v4_rcv() on another CPU can take the socket out of the ehash, walk into tcp_inbound_hash(), and load tp->ao_info via implicit RCU before bh_lock_sock_nested() is taken on the destroying CPU. The reader path then enters __tcp_ao_do_lookup() (net/ipv4/tcp_ao.c:208) which re-loads tp->ao_info via rcu_dereference_check(); the re-load can still observe the (about-to-be-freed) pointer because there is no synchronize_rcu() between rcu_assign_pointer(tp->ao_info, NULL) and tcp_ao_info_free() in tcp_ao_destroy_sock(). The captured pointer is then walked at line 223: hlist_for_each_entry_rcu(key, &ao->head, node, ...) The writer's synchronous kfree() is free to complete between the line 218 re-fetch and the line 223 hlist iteration. The slab is reused (or simply LIST_POISON1-stamped if not yet reused) and the iterati…

Source: OSV.dev (Open Source Vulnerabilities) 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 UBUNTU-CVE-2026-64459 has been found in linux-hwe-edge.
Successful exploitation can lead to full system takeover.
What to do: upgrade linux-hwe-edge to 7.0.0-1012.12~24.04.1 or later.
If unsure, ask your IT team or search "linux-hwe-edge UBUNTU-CVE-2026-64459" on the vendor's site.

UBUNTU-CVE-2026-64459 (linux-hwe-edge)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 7.0.0-1012.12~24.04.1 — 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 linux-hwe-edge.

📍 Affected scope

Check the vendor advisory for the affected versions of linux-hwe-edge.

🔥 Severity

Severity: ?. Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 7.0.0-1012.12~24.04.1.

🛡️ 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 'linux-hwe-edge' . 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 'linux-hwe-edge' . | 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 linux-hwe-edge 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 linux-hwe-edge to 7.0.0-1012.12~24.04.1
```
ステージング環境で 7.0.0-1012.12~24.04.1 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

Ubuntu:16.04:LTS linux-hwe-edge

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-aws-5.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-aws-5.3

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-azure

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-azure-5.3

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-azure-edge

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-gcp

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-gcp-5.3

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-gke-4.15

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-gke-5.4

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-gkeop-5.4

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-hwe

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-hwe-edge

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-oem

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-oracle-5.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:18.04:LTS linux-oracle-5.3

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-aws-5.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-aws-5.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-aws-5.8

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-azure-5.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-azure-5.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-azure-5.8

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-azure-fde

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-gcp-5.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-gcp-5.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-gcp-5.8

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-gke

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-gke-5.15

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-gkeop

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-gkeop-5.15

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-hwe-5.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-hwe-5.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-hwe-5.8

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-intel-5.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-oem-5.10

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-oem-5.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-oem-5.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-oem-5.6

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-oracle-5.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-oracle-5.13

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-oracle-5.8

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-raspi2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-riscv

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-riscv-5.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:20.04:LTS linux-riscv-5.8

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-allwinner-5.19

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-aws-5.19

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-aws-6.2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-aws-6.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-azure-5.19

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-azure-6.2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-azure-6.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-azure-fde-5.19

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-azure-fde-6.2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-gcp-5.19

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-gcp-6.2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-gcp-6.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-hwe-5.19

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-hwe-6.2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-hwe-6.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-intel-iot-realtime

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-lowlatency-hwe-5.19

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-lowlatency-hwe-6.2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-lowlatency-hwe-6.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-nvidia-6.2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-nvidia-6.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-oem-5.17

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-oem-6.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-oem-6.1

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-oem-6.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-oracle-6.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-realtime

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-riscv

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-riscv-5.19

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-riscv-6.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-starfive-5.19

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-starfive-6.2

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:22.04:LTS linux-starfive-6.5

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-aws-6.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-aws-6.17

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-aws-7.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1012.12~24.04.1"}]}]

Ubuntu:24.04:LTS linux-azure-6.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-azure-6.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-azure-7.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1014.14~24.04.1"}]}]

Ubuntu:24.04:LTS linux-azure-fde-6.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-azure-fde-7.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-azure-nvidia-6.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-gcp-6.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-gcp-6.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-gcp-7.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1011.11~24.04.1"}]}]

Ubuntu:24.04:LTS linux-hwe-6.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-hwe-6.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-hwe-7.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-31.31~24.04.1"}]}]

Ubuntu:24.04:LTS linux-lowlatency-hwe-6.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-nvidia-6.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-nvidia-7.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1018.18~24.04.1"}]}]

Ubuntu:24.04:LTS linux-oem-6.11

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-oem-6.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-oem-6.8

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-oracle-6.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-oracle-7.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1011.11~24.04.1"}]}]

Ubuntu:24.04:LTS linux-raspi-realtime

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-realtime

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-riscv

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-riscv-6.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-riscv-6.17

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:24.04:LTS linux-riscv-7.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-31.31.1~24.04.1"}]}]

Ubuntu:Pro:Realtime:24.04:LTS linux-realtime-6.14

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS linux

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-31.31"}]}]

Ubuntu:26.04:LTS linux-aws

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1012.12"}]}]

Ubuntu:26.04:LTS linux-azure

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1014.14"}]}]

Ubuntu:26.04:LTS linux-azure-fde

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS linux-gcp

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1011.11"}]}]

Ubuntu:26.04:LTS linux-gke

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1006.7"}]}]

Ubuntu:26.04:LTS linux-ibm

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1013.13"}]}]

Ubuntu:26.04:LTS linux-nvidia

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1018.18"}]}]

Ubuntu:26.04:LTS linux-nvidia-bos

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-2018.18"}]}]

Ubuntu:26.04:LTS linux-oem-7.0

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1013.13"}]}]

Ubuntu:26.04:LTS linux-oracle

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1011.11"}]}]

Ubuntu:26.04:LTS linux-raspi

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-1019.19"}]}]

Ubuntu:26.04:LTS linux-realtime

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-31.31.1"}]}]

Ubuntu:26.04:LTS linux-riscv

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-31.31.1"}]}]

References

advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
advisory ubuntu.com
report ubuntu.com
report cve.org
report git.kernel.org
report git.kernel.org
report git.kernel.org
report git.kernel.org