Google: sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_18: security update to 20162.0.0

critical Tenable Self-Hosted Container Security Plugin ID 475796

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Zero rpc_gss_wire_cred at
svcauth_gss_decode_credbody() entry svcauth_gss_decode_credbody() writes the caller's rpc_gss_wire_cred
field by field and assigns gc_ctx.len only on the success tail. The caller storage is svcdata->clcred,
which lives in the per-svc_rqst gss_svc_data and is reused across requests. Early decode failures leave
partially decoded state mixed with residue from the prior request. The trailing body_len tightness check
is the sharpest case: xdr_stream_decode_opaque_inline() has already written gc_ctx.data with a borrowed
inline pointer into the current request's XDR pages, but gc_ctx.len retains its prior value. Once the
request pages are released the pooled clcred carries a dangling pointer paired with a stale length. Zero
the caller's rpc_gss_wire_cred at function entry so that every early-return path leaves a deterministic
all-zero cred. On the trailing tightness-check path, gc_ctx.len is now zero instead of stale, which
neuters length-driven consumers such as gss_svc_searchbyctx() that would otherwise walk the dangling data
pointer. (CVE-2026-93207)

Solution

Update the sys-kernel/cchost-kernel-6_18 library and its related packages to version 20162.0.0 or later.

Plugin Details

Severity: Critical

ID: 475796

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.42

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-93207

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/24/2026

Reference Information

CVE: CVE-2026-93207

Detections

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