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CVE-2024-0646

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

High7.0EPSS 0.31%
Published
Updated
Reserved
Assigned by
redhat

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.

Scores

CVSS scores of CVE-2024-0646, by who scored it
Scored byCVSSScoreVector
redhatCNA (assigner)3.1High7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.31% · top 76% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.

Weakness

Affected products

What to do

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.

References (26)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .