Google: sys-kernel/lakitu-kernel-6_1: security update to 18080.0.0

high Tenable Self-Hosted Container Security Plugin ID 451487

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: padata: Fix refcnt handling in
padata_free_shell() In a high-load arm64 environment, the pcrypt_aead01 test in LTP can lead to system UAF
(Use-After-Free) issues. Due to the lengthy analysis of the pcrypt_aead01 function call, I'll describe the
problem scenario using a simplified model: Suppose there's a user of padata named `user_function` that
adheres to the padata requirement of calling `padata_free_shell` after `serial()` has been invoked, as
demonstrated in the following code: ```c struct request { struct padata_priv padata; struct completion
*done; }; void parallel(struct padata_priv *padata) { do_something(); } void serial(struct padata_priv
*padata) { struct request *request = container_of(padata, struct request, padata);
complete(request->done); } void user_function() { DECLARE_COMPLETION(done) padata->parallel = parallel;
padata->serial = serial; padata_do_parallel(); wait_for_completion(&done); padata_free_shell(); } ``` In
the corresponding padata.c file, there's the following code: ```c static void padata_serial_worker(struct
work_struct *serial_work) { ... cnt = 0; while (!list_empty(&local_list)) { ... padata->serial(padata);
cnt++; } local_bh_enable(); if (refcount_sub_and_test(cnt, &pd->refcnt)) padata_free_pd(pd); } ``` Because
of the high system load and the accumulation of unexecuted softirq at this moment, `local_bh_enable()` in
padata takes longer to execute than usual. Subsequently, when accessing `pd->refcnt`, `pd` has already
been released by `padata_free_shell()`, resulting in a UAF issue with `pd->refcnt`. The fix is
straightforward: add `refcount_dec_and_test` before calling `padata_free_pd` in `padata_free_shell`.
(CVE-2023-52854)

Solution

Update the sys-kernel/lakitu-kernel-6_1 library and its related packages to version 18080.0.0 or later.

Plugin Details

Severity: High

ID: 451487

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.15

Vendor

Vendor Severity: HIGH

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-52854

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-2023-52854

Detections

Analytics