Google: sys-kernel/lakitu-kernel-6_1: security update to 18244.1.61

medium Tenable Cloud Security Plugin ID 451776

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: netfilter: nft_set_pipapo: do not free
live element Pablo reports a crash with large batches of elements with a back-to-back add/remove pattern.
Quoting Pablo: add_elem("00000000") timeout 100 ms ... add_elem("0000000X") timeout 100 ms
del_elem("0000000X") <---------------- delete one that was just added ... add_elem("00005000") timeout 100
ms 1) nft_pipapo_remove() removes element 0000000X Then, KASAN shows a splat. Looking at the remove
function there is a chance that we will drop a rule that maps to a non-deactivated element. Removal
happens in two steps, first we do a lookup for key k and return the to-be-removed element and mark it as
inactive in the next generation. Then, in a second step, the element gets removed from the set/map. The
_remove function does not work correctly if we have more than one element that share the same key. This
can happen if we insert an element into a set when the set already holds an element with same key, but the
element mapping to the existing key has timed out or is not active in the next generation. In such case
its possible that removal will unmap the wrong element. If this happens, we will leak the non-deactivated
element, it becomes unreachable. The element that got deactivated (and will be freed later) will remain
reachable in the set data structure, this can result in a crash when such an element is retrieved during
lookup (stale pointer). Add a check that the fully matching key does in fact map to the element that we
have marked as inactive in the deactivation step. If not, we need to continue searching. Add a bug/warn
trap at the end of the function as well, the remove function must not ever be called with an
invisible/unreachable/non-existent element. v2: avoid uneeded temporary variable (Stefano)
(CVE-2024-26924)

Solution

Update the sys-kernel/lakitu-kernel-6_1 library and its related packages to version 18244.1.61 or later.

Plugin Details

Severity: Medium

ID: 451776

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

Percentile: 23.18

Vendor

Vendor Severity: MEDIUM

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-2024-26924

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/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: 4/24/2024

Reference Information

CVE: CVE-2024-26924

Detections

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