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Chainguard: multiple linux-gcp-6.18-bootc packages: security update to 6.18.38-r2

medium Tenable Self-Hosted Container Security Plugin ID 473072

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: net: phonet: do not BUG_ON() in
 pn_socket_autobind() on failed bind syzbot reported a kernel BUG triggered from pn_socket_sendmsg() via
 pn_socket_autobind(): kernel BUG at net/phonet/socket.c:213! RIP: 0010:pn_socket_autobind
 net/phonet/socket.c:213 [inline] RIP: 0010:pn_socket_sendmsg+0x240/0x250 net/phonet/socket.c:421 Call
 Trace: sock_sendmsg_nosec+0x112/0x150 net/socket.c:797 __sock_sendmsg net/socket.c:812 [inline]
 __sys_sendto+0x402/0x590 net/socket.c:2280 ... pn_socket_autobind() calls pn_socket_bind() with port 0
 and, on -EINVAL, assumes the socket was already bound and asserts that the port is non-zero: err =
 pn_socket_bind(sock, ..., sizeof(struct sockaddr_pn)); if (err != -EINVAL) return err;
 BUG_ON(!pn_port(pn_sk(sock->sk)->sobject)); return 0; /* socket was already bound */ However
 pn_socket_bind() also returns -EINVAL when sk->sk_state is not TCP_CLOSE, even when the socket has never
 been bound and pn_port() is still 0. In that case the BUG_ON() fires and panics the kernel from a user-
 triggerable path. Treat the "bind returned -EINVAL but pn_port() is still 0" case as a regular error and
 propagate -EINVAL to the caller instead of crashing. Existing callers already translate a non-zero return
 from pn_socket_autobind() into -ENOBUFS/-EAGAIN, so returning -EINVAL here only changes behaviour from
 panic to a normal errno. (CVE-2026-53292)

Solution

Update the linux-gcp-6.18-bootc library and its related packages to version 6.18.38-r2 or later.

Plugin Details

Severity: Medium

ID: 473072

Version: Revision 1.2

Type: Local

Published: 10/6/2026

Updated: 10/8/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-53292

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: 6/26/2026

Reference Information

CVE: CVE-2026-53292