Linux Kernel up to 6.3.4 __skb_tstamp_tx memory leak

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.3.4. It has been rated as critical. This vulnerability affects the function __skb_tstamp_tx. Performing a manipulation results in memory leak. This vulnerability was named CVE-2023-53716. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.3.4. It has been classified as critical. This affects the function __skb_tstamp_tx. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: net: fix skb leak in __skb_tstamp_tx() Commit 50749f2dd685 ("tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp.") added a call to skb_orphan_frags_rx() to fix leaks with zerocopy skbs. But it ended up adding a leak of its own. When skb_orphan_frags_rx() fails, the function just returns, leaking the skb it just cloned. Free it before returning. This bug was discovered and resolved using Coverity Static Analysis Security Testing (SAST) by Synopsys, Inc.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2023-53716 since 10/22/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 284758 (EulerOS 2.0 SP10 : kernel (EulerOS-SA-2026-1029)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.316, 4.19.284, 5.4.244, 5.10.181, 5.15.114, 6.1.31 or 6.3.5 eliminates this vulnerability. Applying the patch 82501f1ead557cbee1c2467654ec109a80334d22/779332447108545ef04682ea29af5f85c0202aee/58766252f6b2c0487cda6976a53d2bb03ae28e2a/a594382ec6d0cc8cff5a8bc7e61b54e3858fb243/e06841a2abf9c82735cee39e88b1d79464088840/cc18b4685910d5d9de8314bae9c55790701b1811/f4d928c00254cfc9dd0ee7076f4a59bceec675f4/8a02fb71d7192ff1a9a47c9d937624966c6e09af is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (284758) and CERT Bund (WID-SEC-2025-2394). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • Open Source Linux Kernel
  • Dell NetWorker

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 284758
Nessus Name: EulerOS 2.0 SP10 : kernel (EulerOS-SA-2026-1029)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.14.316/4.19.284/5.4.244/5.10.181/5.15.114/6.1.31/6.3.5
Patch: 82501f1ead557cbee1c2467654ec109a80334d22/779332447108545ef04682ea29af5f85c0202aee/58766252f6b2c0487cda6976a53d2bb03ae28e2a/a594382ec6d0cc8cff5a8bc7e61b54e3858fb243/e06841a2abf9c82735cee39e88b1d79464088840/cc18b4685910d5d9de8314bae9c55790701b1811/f4d928c00254cfc9dd0ee7076f4a59bceec675f4/8a02fb71d7192ff1a9a47c9d937624966c6e09af

Timelineinfo

10/22/2025 Advisory disclosed
10/22/2025 +0 days CVE reserved
10/22/2025 +0 days VulDB entry created
02/28/2026 +129 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53716 (🔒)
GCVE (CVE): GCVE-0-2023-53716
GCVE (VulDB): GCVE-100-329343
CERT Bund: WID-SEC-2025-2394 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/22/2025 16:37
Updated: 02/28/2026 13:09
Changes: 10/22/2025 16:37 (58), 01/02/2026 06:45 (7), 01/16/2026 08:26 (2), 02/28/2026 13:09 (1)
Complete: 🔍
Cache ID: 216::103

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