Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19506.299.60

high Tenable Cloud Security Plugin ID 469615

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: nfsd: fix posix_acl leak on SETACL
decode failure nfsaclsvc_decode_setaclargs() and nfs3svc_decode_setaclargs() each call
nfs_stream_decode_acl() twice, first for NFS_ACL and then for NFS_DFACL. Each successful call transfers
ownership of a freshly allocated posix_acl into argp->acl_access or argp->acl_default. If the first call
succeeds but the second fails, the decoder returns false and argp->acl_access is left dangling.
ACLPROC2_SETACL.pc_release was wired to nfssvc_release_attrstat and ACLPROC3_SETACL.pc_release was wired
to nfs3svc_release_fhandle. Both only call fh_put() and have no knowledge of the ACL fields on argp. The
posix_acl_release() pairs sat at the out: labels inside nfsacld_proc_setacl() and nfsd3_proc_setacl(), but
svc_process() skips pc_func when pc_decode returns false, so that cleanup is unreachable on decode
failure: svc_process_common() pc_decode() /* decode_setaclargs: false */ /* pc_func skipped */
pc_release() /* fh_put only -- ACLs leaked */ The orphaned posix_acl is leaked for the lifetime of the
server. Fix by adding nfsaclsvc_release_setacl() and nfs3svc_release_setacl(), which release both
argp->acl_access and argp->acl_default in addition to fh_put(), and wiring them as pc_release for their
respective SETACL procedures. pc_release runs on every path svc_process() takes after decode, including
decode failure, so the posix_acl_release() pairs are removed from the proc functions' out: labels to keep
ownership in one place. This matches the existing release_getacl() pattern used by the sibling GETACL
procedures. (CVE-2026-53397)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19506.299.60 or later.

Plugin Details

Severity: High

ID: 469615

Version: Revision 1.9

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/7/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

Vendor

Vendor Severity: HIGH

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-53397

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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: 7/8/2026

Reference Information

CVE: CVE-2026-53397

Detections

Analytics