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Chainguard: linux-desktop-7.2-bootc: security update to 7.2.7-r0

medium Tenable Self-Hosted Container Security Plugin ID 474663

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: bpf: zero extend the result of an
 arena 32-bit cmpxchg bpf_convert_ctx_accesses() rewrites an atomic on an arena pointer from BPF_STX |
 BPF_ATOMIC to BPF_STX | BPF_PROBE_ATOMIC, and it runs before bpf_opt_subreg_zext_lo32_rnd_hi32(). That
 pass emits an explicit zero extension for a 32-bit cmpxchg even when bpf_jit_needs_zext() is false. This
 is done because on some architectures 32-bit cmpxchg requires explicit zero extension for the dst
 register. E.g. on x86-64 'lock cmpxchg' does not change the %eax if comparison is successful, while BPF
 semantics declare that each operation on a 32-bit register zero extends it's upper half. is_cmpxchg_insn()
 matches BPF_MODE == BPF_ATOMIC only, so an arena cmpxchg misses said zero extension adjustment. This patch
 adjusts is_cmpxchg_insn() to match BPF_PROBE_ATOMIC alongside BPF_ATOMIC. (CVE-2026-98049)

Solution

Update the linux-desktop-7.2-bootc library and its related packages to version 7.2.7-r0 or later.

Plugin Details

Severity: Medium

ID: 474663

Version: Revision 1.3

Type: Local

Published: 10/16/2026

Updated: 10/17/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.66

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-2026-98049

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: 9/25/2026

Reference Information

CVE: CVE-2026-98049