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

medium Tenable Cloud Security Plugin ID 451689

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: ext4: check dot and dotdot of dx_root
before making dir indexed Syzbot reports a issue as follows: ============================================
BUG: unable to handle page fault for address: ffffed11022e24fe PGD 23ffee067 P4D 23ffee067 PUD 0 Oops:
Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 PID: 5079 Comm: syz-executor306 Not tainted
6.10.0-rc5-g55027e689933 #0 Call Trace: <TASK> make_indexed_dir+0xdaf/0x13c0 fs/ext4/namei.c:2341
ext4_add_entry+0x222a/0x25d0 fs/ext4/namei.c:2451 ext4_rename fs/ext4/namei.c:3936 [inline]
ext4_rename2+0x26e5/0x4370 fs/ext4/namei.c:4214 [...] ============================================ The
immediate cause of this problem is that there is only one valid dentry for the block to be split during
do_split, so split==0 results in out of bounds accesses to the map triggering the issue. do_split unsigned
split dx_make_map count = 1 split = count/2 = 0; continued = hash2 == map[split - 1].hash; --->
map[4294967295] The maximum length of a filename is 255 and the minimum block size is 1024, so it is
always guaranteed that the number of entries is greater than or equal to 2 when do_split() is called. But
syzbot's crafted image has no dot and dotdot in dir, and the dentry distribution in dirblock is as
follows: bus dentry1 hole dentry2 free
|xx--|xx-------------|...............|xx-------------|...............| 0 12 (8+248)=256 268 256 524
(8+256)=264 788 236 1024 So when renaming dentry1 increases its name_len length by 1, neither hole nor
free is sufficient to hold the new dentry, and make_indexed_dir() is called. In make_indexed_dir() it is
assumed that the first two entries of the dirblock must be dot and dotdot, so bus and dentry1 are left in
dx_root because they are treated as dot and dotdot, and only dentry2 is moved to the new leaf block.
That's why count is equal to 1. Therefore add the ext4_check_dx_root() helper function to add more sanity
checks to dot and dotdot before starting the conversion to avoid the above issue. (CVE-2024-42305)

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: 451689

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: 23.16

Vendor

Vendor Severity: MEDIUM

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-2024-42305

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: 4/9/2024

Reference Information

CVE: CVE-2024-42305

Detections

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