Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6: security update to 19216.655.6

high Tenable Self-Hosted Container Security Plugin ID 467928

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: vxlan: do not arm the ageing timer on
a device that is down vxlan_changelink() arms vxlan->age_timer whenever the requested ageing interval
differs from the configured one: if (conf.age_interval != vxlan->cfg.age_interval)
mod_timer(&vxlan->age_timer, jiffies); There is no netif_running() test, so the timer is armed even on a
device that was never brought up. The only synchronous cancel in the driver is the timer_delete_sync() in
vxlan_stop(), which is .ndo_stop. netif_close_many() drops devices without IFF_UP before
__dev_close_many() runs, so that cancel is skipped for such a device. vxlan_setup() sets
dev->needs_free_netdev = true and age_timer is a member of struct vxlan_dev, so free_netdev() releases the
allocation the timer lives in while it is still queued on a timer_base. expire_timers() unlinks the entry
before it loads timer->function, so the timer core writes through the freed object's list pointers: BUG:
KASAN: slab-use-after-free in __run_timers+0x208/0x654 Write of size 8 at addr ffff00001adace68 by task
true/192 __asan_store8+0x84/0xac __run_timers+0x208/0x654 run_timer_softirq+0x154/0x18c Allocated by task
189: alloc_netdev_mqs+0x64/0x720 rtnl_create_link+0x4ac/0x520 rtnl_newlink+0x758/0xd00 Freed by task 191:
netdev_release+0x40/0x58 netdev_run_todo+0x4a4/0x8c0 rtnl_dellink+0x200/0x4e8 The rtnl operations involved
are netns-scoped, so an unprivileged user can perform them in a new user and network namespace. Arming the
timer on a down device never had an effect: vxlan_cleanup() returns early on !netif_running(), and
vxlan_open() arms the timer for any non-zero interval once the device is brought up. Add the missing test.
Discovered by XBOW, triaged by Baul Lee <[email protected]> (CVE-2026-74615)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.655.6 or later.

Plugin Details

Severity: High

ID: 467928

Version: Revision 1.5

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/6/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.27

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-74615

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/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: 8/22/2026

Reference Information

CVE: CVE-2026-74615

Detections

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