Service interruption via TIPC skb memory leak
Published May 30, 2024 · Updated May 23, 2026
Memory leak in the Linux kernel TIPC message reassembly path allows local users to exhaust memory through fragmented messages. In net/tipc/msg.c, tipc_buf_append clears the caller's buffer pointer before __skb_linearize; if linearization fails, the error path loses the skb instead of freeing it. A local low-privileged user must drive fragmented-message reassembly and force that failure; repeated failures consume unreleased kernel memory and interrupt service.
Summary
What happened
Memory leak in the Linux kernel TIPC message reassembly path allows local users to exhaust memory through fragmented messages. In net/tipc/msg.c, tipc_buf_append clears the caller's buffer pointer before __skb_linearize; if linearization fails, the error path loses the skb instead of freeing it. A local low-privileged user must drive fragmented-message reassembly and force that failure; repeated failures consume unreleased kernel memory and interrupt service.
The record
- CVE
- CVE-2024-36954
- Published
- May 30, 2024
- Updated
- May 23, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-401
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 30, 2024CVE publishedPublication date reported by the CVE source.
- May 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.14.235 <4.15
- Affected versionversion=4.19.193 <4.19.314
- Affected versionversion=436d650d374329a591c30339a91fa5078052ed1e
- Affected versionversion=4.4.271 <4.5
- Affected versionversion=4.9.271 <4.10
- Affected versionversion=4b1761898861117c97066aea6c58f68a7787f0bf <01cd1b7b685751ee422d00d050292a3d277652d6
- Affected versionversion=5.10.42 <5.10.217
- Affected versionversion=5.12.9 <5.13
- Affected versionversion=5.13
- Affected versionversion=5.4.124 <5.4.276
- Affected versionversion=5489f30bb78ff0dafb4229a69632afc2ba20765c
- Affected versionversion=64d17ec9f1ded042c4b188d15734f33486ed9966 <2f87fd9476cf9725d774e6dcb7d17859c6a6d1ae
- Affected versionversion=6da24cfc83ba4f97ea44fc7ae9999a006101755c <adbce6d20da6254c86425a8d4359b221b5ccbccd
- Affected versionversion=ace300eecbccaa698e2b472843c74a5f33f7dce8
- Affected versionversion=b2c8d28c34b3070407cb1741f9ba3f15d0284b8b
- Affected versionversion=b7df21cf1b79ab7026f545e7bf837bd5750ac026 <3210d34fda4caff212cb53729e6bd46de604d565
- Affected versionversion=b7df21cf1b79ab7026f545e7bf837bd5750ac026 <42c8471b0566c7539e7dd584b4d0ebd3cec8cb2c
- Affected versionversion=b7df21cf1b79ab7026f545e7bf837bd5750ac026 <614c5a5ae45a921595952117b2e2bd4d4bf9b574
- Affected versionversion=b7df21cf1b79ab7026f545e7bf837bd5750ac026 <97bf6f81b29a8efaf5d0983251a7450e5794370d
- Affected versionversion=b7df21cf1b79ab7026f545e7bf837bd5750ac026 <d03a82f4f8144befdc10518e732e2a60b34c870e
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
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