Detections
Analytics

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 19216.739.5

medium Tenable Self-Hosted Container Security Plugin ID 475035

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: vlan: require the MAC header to be
 present in __vlan_insert_inner_tag() __vlan_insert_inner_tag() only guarantees head room via
 skb_cow_head(), never that mac_len bytes of MAC header are present. Its ETH_HLEN wrappers -
 __vlan_insert_tag() under skb_vlan_push(), and vlan_insert_tag() under validate_xmit_vlan() on the generic
 transmit path - therefore rewrite the first 16 bytes at skb->data: a 12-byte memmove plus two 2-byte
 stores at +12 and +14. No caller supplies the bound, while the pop helpers use
 skb_ensure_writable()/pskb_may_pull(). An IFF_TUN device has hard_header_len == 0, so packet_snd() accepts
 a one-byte AF_PACKET/SOCK_RAW frame. The first vlan push only sets a hwaccel tag; the next - clsact
 "action vlan push" or bpf_skb_vlan_push() - enters the helper with skb->len still 1. The head comes from
 skbuff_small_head without __GFP_ZERO, so each push drags bytes from beyond skb->tail into the frame. After
 three the one-byte send leaves as 13 bytes carrying 11 bytes of uninitialised slab: 0000: 5a b3 62 12 80
 88 ff ff 00 b3 62 12 81 `------------------------------' only 0x5a was sent; the rest is slab, here the
 top 56 bits of a linear-map address Require the MAC header the helper rewrites to be present, so such a
 frame is dropped rather than transmitted. (CVE-2026-98377)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.739.5 or later.

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-125.oval.xml.tar.gz

Plugin Details

Severity: Medium

ID: 475035

Version: Revision 1.1

Type: Local

Published: 10/16/2026

Updated: 10/16/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 92.98

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-98377

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/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: 10/9/2026

Reference Information

CVE: CVE-2026-98377