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UBUNTU-CVE-2020-12351
Vulnerability in linux-lts-xenial (UBUNTU-CVE-2020-12351)
Summary
vulnerability in linux-lts-xenial (UBUNTU-CVE-2020-12351). Successful exploitation can lead to full system takeover. Mitigation: upgrade to `4.4.0-262.296~14.04.1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **UBUNTU-CVE-2020-12351** has been found in linux-lts-xenial.
Successful exploitation can lead to full system takeover. CVSS score: ?/10.
What to do: upgrade linux-lts-xenial to **4.4.0-262.296~14.04.1** or later.
If unsure, ask your IT team or search "linux-lts-xenial UBUNTU-CVE-2020-12351" on the vendor's site.
UBUNTU-CVE-2020-12351 (linux-lts-xenial) —
Attack vector: adjacent-network / unauthenticated / no user interaction
Patched: `4.4.0-262.296~14.04.1` — 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-lts-xenial.
📍 Affected scope
linux-lts-xenial — .
🔥 Severity
Severity: ?. Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **4.4.0-262.296~14.04.1**.
🛡️ 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-lts-xenial' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'linux-lts-xenial' . | 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-lts-xenial` を grep し、稼働しているサービス・バージョンを把握する。
-
6Apply patch patch
Upgrade linux-lts-xenial to 4.4.0-262.296~14.04.1ステージング環境で 4.4.0-262.296~14.04.1 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と、Step 3 で見つけた異常検知の続報チェックを含めること。
-
7Post-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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
Ubuntu:Pro:14.04:LTS
linux-lts-xenial
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-262.296~14.04.1"}]}]
Ubuntu:16.04:LTS
linux-hwe
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-122.124~16.04.1"}]}]
Ubuntu:Pro:16.04:LTS
linux
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-262.296"}]}]
Ubuntu:16.04:LTS
linux-hwe-edge
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS:16.04:LTS
linux-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
linux
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-122.124"}]}]
Ubuntu:18.04:LTS
linux-hwe-5.4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-52.57~18.04.1"}]}]
Ubuntu:18.04:LTS
linux-oem
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1100.110"}]}]
Ubuntu:18.04:LTS
linux-oem-osp1
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.0-1071.77"}]}]
Ubuntu:18.04:LTS
linux-raspi-5.4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1022.25~18.04.1"}]}]
Ubuntu:18.04:LTS
linux-raspi2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1074.79"}]}]
Ubuntu:18.04:LTS
linux-raspi2-5.3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.0-1036.38"}]}]
Ubuntu:18.04:LTS
linux-snapdragon
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1090.99"}]}]
Ubuntu:18.04:LTS
linux-hwe
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
linux-hwe-edge
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS-updates:18.04:LTS
linux-aws-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-2031.32"}]}]
Ubuntu:Pro:FIPS-updates:18.04:LTS
linux-azure-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-2013.15"}]}]
Ubuntu:Pro:FIPS-updates:18.04:LTS
linux-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.15.0-1045.52"}]}]
Ubuntu:Pro:FIPS:18.04:LTS
linux-aws-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS:18.04:LTS
linux-azure-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS:18.04:LTS
linux-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS:18.04:LTS
linux-gcp-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
linux
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-52.57"}]}]
Ubuntu:20.04:LTS
linux-aws-5.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1075.82~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-azure-5.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1078.87~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-gcp-5.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1074.83~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-hwe-5.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-130.140~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-hwe-5.8
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.8.0-25.26~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-ibm-5.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1067.70~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-intel-iotg-5.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1071.77~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-lowlatency-hwe-5.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-128.138~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-nvidia-tegra-5.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1032.32~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-oem-5.6
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.6.0-1032.33"}]}]
Ubuntu:20.04:LTS
linux-oracle-5.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1072.78~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-raspi
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1022.25"}]}]
Ubuntu:20.04:LTS
linux-riscv
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-37.42"}]}]
Ubuntu:20.04:LTS
linux-riscv-5.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1070.74~20.04.1"}]}]
Ubuntu:20.04:LTS
linux-azure-fde
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
linux-gke
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS
linux-raspi2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS-updates:20.04:LTS
linux-aws-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1069.73+fips2"}]}]
Ubuntu:Pro:FIPS-updates:20.04:LTS
linux-azure-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1073.76+fips1"}]}]
Ubuntu:Pro:FIPS-updates:20.04:LTS
linux-gcp-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1067.71~20.04.1"}]}]
Ubuntu:Pro:FIPS:20.04:LTS
linux-aws-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS:20.04:LTS
linux-azure-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS:20.04:LTS
linux-gcp-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS
linux
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-130.140"}]}]
Ubuntu:22.04:LTS
linux-aws
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1076.83"}]}]
Ubuntu:22.04:LTS
linux-azure
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1078.87"}]}]
Ubuntu:22.04:LTS
linux-gcp
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1074.83"}]}]
Ubuntu:22.04:LTS
linux-gke
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1072.78"}]}]
Ubuntu:22.04:LTS
linux-gkeop
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1057.64"}]}]
Ubuntu:22.04:LTS
linux-ibm
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1067.70"}]}]
Ubuntu:22.04:LTS
linux-intel-iotg
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1071.77"}]}]
Ubuntu:22.04:LTS
linux-kvm
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1071.76"}]}]
Ubuntu:22.04:LTS
linux-lowlatency
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-128.138"}]}]
Ubuntu:22.04:LTS
linux-nvidia
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1070.71"}]}]
Ubuntu:22.04:LTS
linux-nvidia-tegra
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1032.32"}]}]
Ubuntu:22.04:LTS
linux-nvidia-tegra-igx
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1020.20"}]}]
Ubuntu:22.04:LTS
linux-oracle
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1073.79"}]}]
Ubuntu:22.04:LTS
linux-raspi
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1070.73"}]}]
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-xilinx-zynqmp
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1041.45"}]}]
Ubuntu:Nvidia-BlueField:22.04:LTS
linux-bluefield
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1058.60"}]}]
Ubuntu:Pro:FIPS-preview:22.04:LTS
linux-aws-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS-preview:22.04:LTS
linux-azure-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS-preview:22.04:LTS
linux-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS-preview:22.04:LTS
linux-gcp-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:FIPS-updates:22.04:LTS
linux-aws-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1076.83+fips1"}]}]
Ubuntu:Pro:FIPS-updates:22.04:LTS
linux-azure-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1078.87+fips1"}]}]
Ubuntu:Pro:FIPS-updates:22.04:LTS
linux-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-128.138+fips1"}]}]
Ubuntu:Pro:FIPS-updates:22.04:LTS
linux-gcp-fips
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1073.81+fips1"}]}]
Ubuntu:Pro:Realtime:22.04:LTS
linux-intel-iot-realtime
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1071.73"}]}]
Ubuntu:Pro:Realtime:22.04:LTS
linux-realtime
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1075.83"}]}]
Ubuntu:24.04:LTS
linux
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-35.35"}]}]
Ubuntu:24.04:LTS
linux-aws
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1009.9"}]}]
Ubuntu:24.04:LTS
linux-azure
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1008.8"}]}]
Ubuntu:24.04:LTS
linux-gcp
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1008.9"}]}]
Ubuntu:24.04:LTS
linux-gke
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1004.7"}]}]
Ubuntu:24.04:LTS
linux-ibm
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1006.6"}]}]
Ubuntu:24.04:LTS
linux-lowlatency
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-35.35.1"}]}]
Ubuntu:24.04:LTS
linux-oem-6.8
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1006.6"}]}]
Ubuntu:24.04:LTS
linux-oracle
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1006.6"}]}]
Ubuntu:24.04:LTS
linux-raspi
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1005.5"}]}]
Ubuntu:24.04:LTS
linux-riscv
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-35.35.1"}]}]
Ubuntu:Pro:Realtime:24.04:LTS
linux-raspi-realtime
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-2004.4"}]}]
Ubuntu:Pro:Realtime:24.04:LTS
linux-realtime
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.1-1002.2"}]}]
Ubuntu:26.04
linux-nvidia
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- advisory https://ubuntu.com/security/notices/USN-4592-1
- advisory https://ubuntu.com/security/notices/USN-4591-1
- advisory https://ubuntu.com/security/notices/USN-7179-1
- advisory https://ubuntu.com/security/notices/USN-7179-2
- advisory https://ubuntu.com/security/notices/USN-7183-1
- advisory https://ubuntu.com/security/notices/USN-7186-1
- advisory https://ubuntu.com/security/notices/USN-7179-3
- advisory https://ubuntu.com/security/notices/USN-7186-2
- advisory https://ubuntu.com/security/notices/USN-7194-1
- advisory https://ubuntu.com/security/notices/USN-7179-4
- report https://ubuntu.com/security/CVE-2020-12351
- report https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00435.html
- report https://github.com/google/security-research/security/advisories/GHSA-h637-c88j-47wq
- report https://lore.kernel.org/linux-bluetooth/[email protected]/
- report https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?h=for-upstream&id=f19425641cb2572a33cb074d5e30283720bd4d22
- report https://www.cve.org/CVERecord?id=CVE-2020-12351