CVE-2023-54306

net: tls: avoid hanging tasks on the tx_lock

HIGH
7.5
CVSS Score
Published: December 30, 2025 at 12:23 PM UTC
Updated: October 15, 2026 at 10:17 PM UTC
1 product affected across 1 vendorLinux Kernel

Using Linux by Linux?

Get instant alerts when new vulnerabilities affect Linux - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.5
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.3.115.479ffe6087e9145d2377385cac48d0d6a6b4225a5c8d6817345f4ba228d07380e571676405e112872
Vendor states this is fixed in 1f800f6aae57d2d8f63d32fff383017cbc11cf65 (fixed)
Vendor states this is fixed in 7123a4337bf73132bbfb5437e4dc83ba864a9a1e (fixed)
Vendor states this is fixed in bde541a57b4204d0a800afbbd3d1c06c9cdb133f (fixed)
Vendor states this is fixed in be5d5d0637fd88c18ee76024bdb22649a1de00d6 (fixed)
Vendor states this is fixed in ccf1ccdc5926907befbe880b562b2a4b5f44c087 (fixed)
Vendor states this is fixed in f3221361dc85d4de22586ce8441ec2c67b454f5d (fixed)
Vendor states this is fixed in 5.10.173 (unaffected)
Vendor states this is fixed in 5.15.100 (unaffected)
Vendor states this is fixed in 5.4 (unaffected)
Vendor states this is fixed in 5.4.235 (unaffected)
Vendor states this is fixed in 6.1.18 (unaffected)
Vendor states this is fixed in 6.2.5 (unaffected)
Vendor states this is fixed in 6.3 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHLinux
Vector?

Quick Info

StatusDEFERRED

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card