Google: sys-kernel/csql-kernel-6_1: security update to 18244.582.100

critical Tenable Cloud Security Plugin ID 451333

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: net/tls: fix use-after-free in -EBUSY
error path of tls_do_encryption The -EBUSY handling in tls_do_encryption(), introduced by commit
859054147318 ("net: tls: handle backlogging of crypto requests"), has a use-after-free due to double
cleanup of encrypt_pending and the scatterlist entry. When crypto_aead_encrypt() returns -EBUSY, the
request is enqueued to the cryptd backlog and the async callback tls_encrypt_done() will be invoked upon
completion. That callback unconditionally restores the scatterlist entry (sge->offset, sge->length) and
decrements ctx->encrypt_pending. However, if tls_encrypt_async_wait() returns an error, the synchronous
error path in tls_do_encryption() performs the same cleanup again, double-decrementing encrypt_pending and
double-restoring the scatterlist. The double-decrement corrupts the encrypt_pending sentinel (initialized
to 1), making tls_encrypt_async_wait() permanently skip the wait for pending async callbacks. A subsequent
sendmsg can then free the tls_rec via bpf_exec_tx_verdict() while a cryptd callback is still pending,
resulting in a use-after-free when the callback fires on the freed record. Fix this by skipping the
synchronous cleanup when the -EBUSY async wait returns an error, since the callback has already handled
encrypt_pending and sge restoration. (CVE-2026-31533)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18244.582.100 or later.

Plugin Details

Severity: Critical

ID: 451333

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: 6.9

Percentile: 96.92

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-31533

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 4/23/2026

Reference Information

CVE: CVE-2026-31533

Detections

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