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CLSA-2026-1773048865
Vulnerability in bpftool (CLSA-2026-1773048865)
Summary
vulnerability in bpftool (CLSA-2026-1773048865). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `4.18.0-305.25.1.el8_4.tuxcare.els35` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CLSA-2026-1773048865** has been found in bpftool.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade bpftool to **4.18.0-305.25.1.el8_4.tuxcare.els35** or later.
If unsure, ask your IT team or search "bpftool CLSA-2026-1773048865" on the vendor's site.
CLSA-2026-1773048865 (bpftool) —
Patched: `4.18.0-305.25.1.el8_4.tuxcare.els35` — 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 bpftool.
📍 Affected scope
bpftool — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **4.18.0-305.25.1.el8_4.tuxcare.els35**.
🛡️ 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 'bpftool' .` 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 'bpftool' . | 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 `bpftool` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade bpftool to 4.18.0-305.25.1.el8_4.tuxcare.els35ステージング環境で 4.18.0-305.25.1.el8_4.tuxcare.els35 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。
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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
TuxCare:CentOS:8.4
bpftool
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-core
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-cross-headers
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-debug
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-debug-core
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-debug-devel
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-debug-modules
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-debug-modules-extra
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-debug-modules-internal
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-devel
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-headers
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-ipaclones-internal
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-modules
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-modules-extra
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-modules-internal
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-selftests-internal
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-tools
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-tools-libs
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
kernel-tools-libs-devel
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
perf
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]
TuxCare:CentOS:8.4
python3-perf
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-305.25.1.el8_4.tuxcare.els35"}]}]