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Bottlerocket: kernel-5.15, kernel-6.1: security update to 2.3.0

medium Tenable Self-Hosted Container Security Plugin ID 427943

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: x86: stop playing stack games in
 profile_pc() The 'profile_pc()' function is used for timer-based profiling, which isn't really all that
 relevant any more to begin with, but it also ends up making assumptions based on the stack layout that
 aren't necessarily valid. Basically, the code tries to account the time spent in spinlocks to the caller
 rather than the spinlock, and while I support that as a concept, it's not worth the code complexity or the
 KASAN warnings when no serious profiling is done using timers anyway these days. And the code really does
 depend on stack layout that is only true in the simplest of cases. We've lost the comment at some point (I
 think when the 32-bit and 64-bit code was unified), but it used to say: Assume the lock function has
 either no stack frame or a copy of eflags from PUSHF. which explains why it just blindly loads a word or
 two straight off the stack pointer and then takes a minimal look at the values to just check if they might
 be eflags or the return pc: Eflags always has bits 22 and up cleared unlike kernel addresses but that
 basic stack layout assumption assumes that there isn't any lock debugging etc going on that would
 complicate the code and cause a stack frame. It causes KASAN unhappiness reported for years by syzkaller
 [1] and others [2]. With no real practical reason for this any more, just remove the code. Just for
 historical interest, here's some background commits relating to this code from 2006: 0cb91a229364 ("i386:
 Account spinlocks to the caller during profiling for !FP kernels") 31679f38d886 ("Simplify profile_pc on
 x86-64") and a code unification from 2009: ef4512882dbe ("x86: time_32/64.c unify profile_pc") but the
 basics of this thing actually goes back to before the git tree. (CVE-2024-42096)

Plugin Details

Severity: Medium

ID: 427943

Version: Revision 1.4

Type: Local

Published: 6/30/2025

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.7

Percentile: 96.51

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-2024-42096

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: 12/12/2023

Reference Information

CVE: CVE-2024-42096