Linux Kernel up to 6.18.18/6.19.8 net emac_tx_mem_map privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.18.18/6.19.8. Impacted is the function emac_tx_mem_map of the component net. Executing a manipulation can lead to an unknown weakness. The identification of this vulnerability is CVE-2026-43462. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.18.18/6.19.8. This vulnerability affects the function emac_tx_mem_map of the component net. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net: spacemit: Fix error handling in emac_tx_mem_map() The DMA mappings were leaked on mapping error. Free them with the existing emac_free_tx_buf() function.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-43462 since 05/01/2026. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/22/2026).

The vulnerability scanner Nessus provides a plugin with the ID 315715 (Linux Distros Unpatched Vulnerability : CVE-2026-43462), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.18.19 or 6.19.9 eliminates this vulnerability. Applying the patch c34ebd7b24ea70be3c6fdb6936f79f593f37df60/edeaba385318f60ec1b32470da4d5eb800294d16/86292155bea578ebab0ca3b65d4d87ecd8a0e9ea 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 vulnerability database at Tenable (315715). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (Linux): 🔒

CVSSv2info

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

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 315715
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-43462

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.19/6.19.9
Patch: c34ebd7b24ea70be3c6fdb6936f79f593f37df60/edeaba385318f60ec1b32470da4d5eb800294d16/86292155bea578ebab0ca3b65d4d87ecd8a0e9ea

Timelineinfo

05/01/2026 CVE reserved
05/08/2026 +7 days Advisory disclosed
05/08/2026 +0 days VulDB entry created
05/22/2026 +14 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-43462 (🔒)
GCVE (CVE): GCVE-0-2026-43462
GCVE (VulDB): GCVE-100-362224

Entryinfo

Created: 05/08/2026 18:28
Updated: 05/22/2026 04:54
Changes: 05/08/2026 18:28 (58), 05/21/2026 03:54 (11), 05/22/2026 04:54 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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