Google: sys-kernel/csql-kernel-6_1, sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_1, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6, sys-kernel/tpusev-kernel-6_6: security update to 18613.731.2

high Tenable Cloud Security Plugin ID 465872

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: mm/hugetlb: fix list corruption in
allocate_file_region_entries() allocate_file_region_entries() tops up resv->region_cache with freshly
allocated file_region descriptors. The allocation uses GFP_KERNEL, so resv->lock is dropped around it: the
new entries are gathered on a stack-local list head, allocated_regions, and spliced into
resv->region_cache once the lock is re-acquired. The splice used list_splice(), which moves the entries
but does not re-initialize the source head, so allocated_regions is left pointing at an entry that now
lives on resv->region_cache. The top-up runs in a while loop that re-checks the cache deficit after re-
acquiring the lock. For a shared mapping the resv_map is shared by every mapper of the hugetlbfs inode, so
a concurrent region_chg()/region_add()/region_del() on the same resv_map can consume cache entries during
the unlocked window and force a second iteration. That iteration calls list_add() on the stale head and
corrupts the list; with CONFIG_DEBUG_LIST the __list_add_valid() check trips: list_add corruption.
next->prev should be prev (ffffc900011ff7f8), but was ffff88814c281460. (next=ffff88814c545640). kernel
BUG at lib/list_debug.c:31! allocate_file_region_entries+0x191/0x420 region_chg+0x267/0x300
hugetlb_reserve_pages+0x387/0xc80 hugetlbfs_file_mmap+0x2ce/0x3f0 mmap_region+0x1348/0x1a80
do_mmap+0x85e/0xb90 vm_mmap_pgoff+0x18c/0x330 ksys_mmap_pgoff+0x2a1/0x3e0 do_syscall_64+0xd7/0x420 Without
CONFIG_DEBUG_LIST the bad list_add() silently links a kernel-stack address into resv->region_cache,
leading to later use-after-free. This was observed as a real host panic on a dense KVM host where a QEMU
guest-RAM hugetlbfs file was mapped MAP_SHARED by both QEMU and a separate SPDK/DPDK vhost-user target,
generating concurrent region_* traffic on one shared resv_map. Use list_splice_init() so the source head
is re-initialized empty after each splice, making the retry loop safe. (CVE-2026-74518)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18613.731.2 or later.

Plugin Details

Severity: High

ID: 465872

Version: Revision 1.3

Type: Local

Family: Google COS Security Checks

Published: 10/2/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.56

Vendor

Vendor Severity: LOW

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-2026-74518

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: 8/11/2026

Reference Information

CVE: CVE-2026-74518

Detections

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