---
id: CVE-2023-54306
title: 'net: tls: avoid hanging tasks on the tx_lock'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: tls: avoid hanging tasks on the tx_lock

  syzbot sent a hung task report and Eric explains that adversarial
  receiver may keep RWIN at 0 for a long time, so we are n…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 <
    bde541a57b4204d0a800afbbd3d1c06c9cdb133f
  - >-
    Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 <
    7123a4337bf73132bbfb5437e4dc83ba864a9a1e
  - >-
    Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 <
    be5d5d0637fd88c18ee76024bdb22649a1de00d6
  - >-
    Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 <
    1f800f6aae57d2d8f63d32fff383017cbc11cf65
  - >-
    Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 <
    ccf1ccdc5926907befbe880b562b2a4b5f44c087
  - >-
    Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 <
    f3221361dc85d4de22586ce8441ec2c67b454f5d
  - Linux c8d6817345f4ba228d07380e571676405e112872
  - Linux >= 5.3.11 < 5.4
  - Linux 5.4
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-15T21:40:10.978521Z'
published: '2025-12-30'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T21:41:44.334Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-54306'
references:
  - url: 'https://git.kernel.org/stable/c/bde541a57b4204d0a800afbbd3d1c06c9cdb133f'
  - url: 'https://git.kernel.org/stable/c/7123a4337bf73132bbfb5437e4dc83ba864a9a1e'
  - url: 'https://git.kernel.org/stable/c/be5d5d0637fd88c18ee76024bdb22649a1de00d6'
  - url: 'https://git.kernel.org/stable/c/1f800f6aae57d2d8f63d32fff383017cbc11cf65'
  - url: 'https://git.kernel.org/stable/c/ccf1ccdc5926907befbe880b562b2a4b5f44c087'
  - url: 'https://git.kernel.org/stable/c/f3221361dc85d4de22586ce8441ec2c67b454f5d'
tags:
  - cve.org
epss: 0.00599
epssPercentile: 0.4742
ingestedAt: '2026-10-15T22:48:25.438Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

net: tls: avoid hanging tasks on the tx_lock

syzbot sent a hung task report and Eric explains that adversarial
receiver may keep RWIN at 0 for a long time, so we are not guaranteed
to make forward progress. Thread which took tx_lock and went to sleep
may not release tx_lock for hours. Use interruptible sleep where
possible and reschedule the work if it can't take the lock.

Testing: existing selftest passes

## Affected

- `Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 < bde541a57b4204d0a800afbbd3d1c06c9cdb133f`
- `Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 < 7123a4337bf73132bbfb5437e4dc83ba864a9a1e`
- `Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 < be5d5d0637fd88c18ee76024bdb22649a1de00d6`
- `Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 < 1f800f6aae57d2d8f63d32fff383017cbc11cf65`
- `Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 < ccf1ccdc5926907befbe880b562b2a4b5f44c087`
- `Linux >= 79ffe6087e9145d2377385cac48d0d6a6b4225a5 < f3221361dc85d4de22586ce8441ec2c67b454f5d`
- `Linux c8d6817345f4ba228d07380e571676405e112872`
- `Linux >= 5.3.11 < 5.4`
- `Linux 5.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.