Google: sys-kernel/csql-kernel-6_1, sys-kernel/lakitu-kernel-6_1: security update to 18244.236.5

medium Tenable Self-Hosted Container Security Plugin ID 450567

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: posix-timers: Ensure timer ID search-
loop limit is valid posix_timer_add() tries to allocate a posix timer ID by starting from the cached ID
which was stored by the last successful allocation. This is done in a loop searching the ID space for a
free slot one by one. The loop has to terminate when the search wrapped around to the starting point. But
that's racy vs. establishing the starting point. That is read out lockless, which leads to the following
problem: CPU0 CPU1 posix_timer_add() start = sig->posix_timer_id; lock(hash_lock); ... posix_timer_add()
if (++sig->posix_timer_id < 0) start = sig->posix_timer_id; sig->posix_timer_id = 0; So CPU1 can observe a
negative start value, i.e. -1, and the loop break never happens because the condition can never be true:
if (sig->posix_timer_id == start) break; While this is unlikely to ever turn into an endless loop as the
ID space is huge (INT_MAX), the racy read of the start value caught the attention of KCSAN and Dmitry
unearthed that incorrectness. Rewrite it so that all id operations are under the hash lock.
(CVE-2023-53728)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18244.236.5 or later.

Plugin Details

Severity: Medium

ID: 450567

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.8

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 4.5

Temporal Score: 3.3

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

CVSS Score Source: CVE-2023-53728

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/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: 7/21/2021

Reference Information

CVE: CVE-2023-53728

Detections

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