Linux Kernel up to 6.19.5 net dma_free_coherent buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.6$5k-$25k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.19.5 and classified as critical. Impacted is the function dma_free_coherent of the component net. The manipulation leads to buffer overflow. This vulnerability is listed as CVE-2026-43283. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.5 and classified as critical. This issue affects the function dma_free_coherent of the component net. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle dma_free_coherent() in error path takes priv->rx_buf.alloc_len as the dma handle. This would lead to improper unmapping of the buffer. Change the dma handle to priv->rx_buf.alloc_phys.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-43283 since 05/01/2026. The exploitation is known to be easy. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/25/2026).

The vulnerability scanner Nessus provides a plugin with the ID 329305 (openSUSE 16: cluster-md-kmp-64kb / cluster-md-kmp-azure / cluster-md-kmp-default / etc (openSUSE-SU-2026:21388-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16 or 6.19.6 eliminates this vulnerability. Applying the patch 0f589ee54fd6d76d3f75e745f7f12c64cbd749e5/accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0/8320727be7ff704e07c87624efc2a4a75f54b3ce/1e300c33ef3cc544c2b9c693778fe9490cfe9184/1b1371cd4032ae859838ebc74215f569987bb197/1b1d3c5d58a80a19d017a409aa2308162bab5bbf/7e54ff938bebb173822b4c38b33fc164c1cabf92/ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2 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 (329305). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
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: Buffer overflow
CWE: CWE-120 / CWE-119
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: 329305
Nessus Name: openSUSE 16: cluster-md-kmp-64kb / cluster-md-kmp-azure / cluster-md-kmp-default / etc (openSUSE-SU-2026:21388-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.252/5.15.202/6.1.165/6.6.128/6.12.75/6.18.16/6.19.6
Patch: 0f589ee54fd6d76d3f75e745f7f12c64cbd749e5/accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0/8320727be7ff704e07c87624efc2a4a75f54b3ce/1e300c33ef3cc544c2b9c693778fe9490cfe9184/1b1371cd4032ae859838ebc74215f569987bb197/1b1d3c5d58a80a19d017a409aa2308162bab5bbf/7e54ff938bebb173822b4c38b33fc164c1cabf92/ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2

Timelineinfo

05/01/2026 CVE reserved
05/06/2026 +5 days Advisory disclosed
05/06/2026 +0 days VulDB entry created
07/25/2026 +80 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-43283 (🔒)
GCVE (CVE): GCVE-0-2026-43283
GCVE (VulDB): GCVE-100-361553

Entryinfo

Created: 05/06/2026 17:21
Updated: 07/25/2026 11:27
Changes: 05/06/2026 17:21 (60), 07/25/2026 11:27 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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