CVE-2024-0646

Kernel: ktls overwrites readonly memory pages when using function splice with a ktls socket as destination

Published Jan 17, 2024 CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
Description
An out-of-bounds memory write flaw was found in the Linux kernel’s Transport Layer Security functionality in how a user calls a function splice with a ktls socket as the destination. This flaw allows a local user to crash or potentially escalate their privileges on the system.

Remediation

Vendor Workaround

To mitigate this issue, prevent module tls from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-3841-1 linux-5.10 security update
EUVD EUVD EUVD-2024-16438 An out-of-bounds memory write flaw was found in the Linux kernel’s Transport Layer Security functionality in how a user calls a function splice with a ktls socket as the destination. This flaw allows a local user to crash or potentially escalate their privileges on the system.
Ubuntu USN Ubuntu USN USN-6639-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6648-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6648-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-6651-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6651-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6651-3 Linux kernel (StarFive) vulnerabilities
Ubuntu USN Ubuntu USN USN-6652-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-6653-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6653-2 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-6653-3 Linux kernel (Low Latency) vulnerabilities
Ubuntu USN Ubuntu USN USN-6653-4 Linux kernel (GKE) vulnerabilities
History
Type Values Removed Values Added
First Time appeared Redhat rhel Els
CPEs cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:rhel_els:6
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat rhel Els
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-1314
Type Values Removed Values Added
Weaknesses CWE-1314
Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 4, 2026, 9:07 PM
Reserved
Jan 17, 2024, 1:11 PM
Status
Modified
Published
Jan 17, 2024, 4:15 PM
Modified
Nov 4, 2026, 9:17 PM
Severity
Important
Public date
Dec 7, 2023, 6:30 AM