Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_6: security update to 19216.104.149

medium Tenable Self-Hosted Container Security Plugin ID 472439

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: btrfs: always detect conflicting
inodes when logging inode refs After rename exchanging (either with the rename exchange operation or
regular renames in multiple non-atomic steps) two inodes and at least one of them is a directory, we can
end up with a log tree that contains only of the inodes and after a power failure that can result in an
attempt to delete the other inode when it should not because it was not deleted before the power failure.
In some case that delete attempt fails when the target inode is a directory that contains a subvolume
inside it, since the log replay code is not prepared to deal with directory entries that point to root
items (only inode items). 1) We have directories "dir1" (inode A) and "dir2" (inode B) under the same
parent directory; 2) We have a file (inode C) under directory "dir1" (inode A); 3) We have a subvolume
inside directory "dir2" (inode B); 4) All these inodes were persisted in a past transaction and we are
currently at transaction N; 5) We rename the file (inode C), so at btrfs_log_new_name() we update inode
C's last_unlink_trans to N; 6) We get a rename exchange for "dir1" (inode A) and "dir2" (inode B), so
after the exchange "dir1" is inode B and "dir2" is inode A. During the rename exchange we call
btrfs_log_new_name() for inodes A and B, but because they are directories, we don't update their
last_unlink_trans to N; 7) An fsync against the file (inode C) is done, and because its inode has a
last_unlink_trans with a value of N we log its parent directory (inode A) (through
btrfs_log_all_parents(), called from btrfs_log_inode_parent()). 8) So we end up with inode B not logged,
which now has the old name of inode A. At copy_inode_items_to_log(), when logging inode A, we did not
check if we had any conflicting inode to log because inode A has a generation lower than the current
transaction (created in a past transaction); 9) After a power failure, when replaying the log tree, since
we find that inode A has a new name that conflicts with the name of inode B in the fs tree, we attempt to
delete inode B... this is wrong since that directory was never deleted before the power failure, and
because there is a subvolume inside that directory, attempting to delete it will fail since
replay_dir_deletes() and btrfs_unlink_inode() are not prepared to deal with dir items that point to roots
instead of inodes. When that happens the mount fails and we get a stack trace like the following:
[87.2314] BTRFS info (device dm-0): start tree-log replay [87.2318] BTRFS critical (device dm-0): failed
to delete reference to subvol, root 5 inode 256 parent 259 [87.2332] ------------[ cut here ]------------
[87.2338] BTRFS: Transaction aborted (error -2) [87.2346] WARNING: CPU: 1 PID: 638968 at
fs/btrfs/inode.c:4345 __btrfs_unlink_inode+0x416/0x440 [btrfs] [87.2368] Modules linked in: btrfs loop
dm_thin_pool (...) [87.2470] CPU: 1 UID: 0 PID: 638968 Comm: mount Tainted: G W 6.18.0-rc7-btrfs-next-218+
#2 PREEMPT(full) [87.2489] Tainted: [W]=WARN [87.2494] Hardware name: QEMU Standard PC (i440FX + PIIX,
1996), BIOS rel-1.16.2-0-gea1b7a073390-prebuilt.qemu.org 04/01/2014 [87.2514] RIP:
0010:__btrfs_unlink_inode+0x416/0x440 [btrfs] [87.2538] Code: c0 89 04 24 (...) [87.2568] RSP:
0018:ffffc0e741f4b9b8 EFLAGS: 00010286 [87.2574] RAX: 0000000000000000 RBX: ffff9d3ec8a6cf60 RCX:
0000000000000000 [87.2582] RDX: 0000000000000002 RSI: ffffffff84ab45a1 RDI: 00000000ffffffff [87.2591]
RBP: ffff9d3ec8a6ef20 R08: 0000000000000000 R09: ffffc0e741f4b840 [87.2599] R10: ffff9d45dc1fffa8 R11:
0000000000000003 R12: ffff9d3ee26d77e0 [87.2608] R13: ffffc0e741f4ba98 R14: ffff9d4458040800 R15:
ffff9d44b6b7ca10 [87.2618] FS: 00007f7b9603a840(0000) GS:ffff9d4658982000(0000) knlGS:0000000000000000
[87. ---truncated--- (CVE-2025-71183)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.104.149 or later.

Plugin Details

Severity: Medium

ID: 472439

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.86

Vendor

Vendor Severity: LOW

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-2025-71183

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: 1/31/2026

Reference Information

CVE: CVE-2025-71183

Detections

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