Vulnerability in Linux kernel (CVE-2026-93190)
Summary
Vulnerability in Linux kernel (CVE-2026-93190). Successful exploitation can lead to full system takeover.
Original description
The description as published by the source.
In the Linux kernel, the following vulnerability has been resolved:
platform/chrome: cros_ec_typec: Reject out-of-bounds PD cap count
cros_typec_register_partner_pdos() copies the partner PDOs from the EC
TYPEC_STATUS response into the fixed caps_desc.pdo[PDO_MAX_OBJECTS] array.
memcpy(caps_desc.pdo, resp->source_cap_pdos,
sizeof(u32) * resp->source_cap_count);
...
memcpy(caps_desc.pdo, resp->sink_cap_pdos,
sizeof(u32) * resp->sink_cap_count);
PDO_MAX_OBJECTS is 7. source_cap_count and sink_cap_count are u8 fields
from the EC. The only check is that they are not both zero. If either is
larger than 7, the memcpy writes past the end of the array on the stack.
A count of 255 overflows it by about 1 KB. The EC source arrays are only
seven entries wide. A larger count reads past them too.
The ChromeOS EC firmware caps these counts today, so a compliant setup
does not hit this. The kernel should still validate these values rather
than trust them.
Validate the counts in cros_typec_register_partner_pdos() next to the
memcpy. Skip the PDO registration if either count is above PDO_MAX_OBJECTS.
The rest of cros_typec_handle_status() still runs so events are handled
and cleared.
Source: NIST National Vulnerability Database NVD GitHub Advisory
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-2026-93190 has been found in Linux kernel.
Successful exploitation can lead to full system takeover. CVSS score: 8.4/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux kernel CVE-2026-93190" on the vendor's site.
CVE-2026-93190 (Linux kernel) — CVSS v3 8.4
Attack vector: local / unauthenticated / no user interaction
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.
A vulnerability (unclassified) exists in Linux kernel.
Check the vendor advisory for the affected versions of Linux kernel.
Severity: High (CVSS 8.4/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Linux kernel を使っているサービスとバージョンを洗い出す。
-
2Post-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。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-93190 linux Fixed in: 6.1.190-1
- Ubuntu UBUNTU-CVE-2026-93190 linux-hwe-edge
References
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web nvd.nist.gov
- web github.com