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9.8
CRITICAL CVSS 3.1
CVE-2026-74495
igbvf: Fix leak in TX DMA error cleanup
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: igbvf: Fix leak in TX DMA error cleanup If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb. Because count is incremented before each frag mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping (the head) would leak. This bug was introduced by a 2010 fix for an endless loop in dma_error. All other affected drivers have already been fixed.

Details
INFO

Published Date :

Aug. 15, 2026, 1:17 p.m.

Last Modified :

Aug. 19, 2026, 5:21 p.m.

Remotely Exploit :

Yes !

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-74495 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 CRITICAL 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Fix buffer mapping error to prevent memory leaks in the igbvf driver.
  • Update the Linux kernel to include the igbvf driver fix.
  • Ensure all DMA mapping operations are properly handled.
  • Verify buffer unmapping logic in error conditions.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-74495.

URL Resource
https://git.kernel.org/stable/c/0565052b7e2f436b7f1541f4849da96dc0aa7a0e
https://git.kernel.org/stable/c/31089f4eab42e0fc248ec80c26f9b0bad59ba4cc
https://git.kernel.org/stable/c/56726ff12cb6759ab90d6f5332c2377aeca7d249
https://git.kernel.org/stable/c/845a9cdd9b03b7b6fa8de3ee80579780350a7f65
https://git.kernel.org/stable/c/bc25d56c03e41c10bc4b40e99ca5d7b941675c04
https://git.kernel.org/stable/c/df07003b5a6c6c9fce60d765d6a3da815a74c41c
https://git.kernel.org/stable/c/e3ed89c257f6361f13df23023cd10ace830330ad
https://git.kernel.org/stable/c/e42b7225c45f57b42306b80cdd3bda202bae7293
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-74495 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-74495 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-74495 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-74495 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 19, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/56726ff12cb6759ab90d6f5332c2377aeca7d249
    Added Reference https://git.kernel.org/stable/c/e3ed89c257f6361f13df23023cd10ace830330ad
    Added Reference https://git.kernel.org/stable/c/e42b7225c45f57b42306b80cdd3bda202bae7293
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '31089f4eab42e0fc248ec80c26f9b0bad59ba4cc', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'bc25d56c03e41c10bc4b40e99ca5d7b941675c04', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '845a9cdd9b03b7b6fa8de3ee80579780350a7f65', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'df07003b5a6c6c9fce60d765d6a3da815a74c41c', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '0565052b7e2f436b7f1541f4849da96dc0aa7a0e', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/intel/igbvf/netdev.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.33'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.33', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/intel/igbvf/netdev.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'e42b7225c45f57b42306b80cdd3bda202bae7293', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'e3ed89c257f6361f13df23023cd10ace830330ad', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '56726ff12cb6759ab90d6f5332c2377aeca7d249', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '31089f4eab42e0fc248ec80c26f9b0bad59ba4cc', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'bc25d56c03e41c10bc4b40e99ca5d7b941675c04', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '845a9cdd9b03b7b6fa8de3ee80579780350a7f65', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'df07003b5a6c6c9fce60d765d6a3da815a74c41c', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '0565052b7e2f436b7f1541f4849da96dc0aa7a0e', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/intel/igbvf/netdev.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.33'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.33', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.265', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.216', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.183', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/intel/igbvf/netdev.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '31089f4eab42e0fc248ec80c26f9b0bad59ba4cc', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'bc25d56c03e41c10bc4b40e99ca5d7b941675c04', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '845a9cdd9b03b7b6fa8de3ee80579780350a7f65', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'df07003b5a6c6c9fce60d765d6a3da815a74c41c', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '0565052b7e2f436b7f1541f4849da96dc0aa7a0e', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/intel/igbvf/netdev.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.33'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.33', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/intel/igbvf/netdev.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '31089f4eab42e0fc248ec80c26f9b0bad59ba4cc', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'bc25d56c03e41c10bc4b40e99ca5d7b941675c04', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '845a9cdd9b03b7b6fa8de3ee80579780350a7f65', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'df07003b5a6c6c9fce60d765d6a3da815a74c41c', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '0565052b7e2f436b7f1541f4849da96dc0aa7a0e', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/intel/igbvf/netdev.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.33'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.33', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/intel/igbvf/netdev.c'], 'defaultStatus': 'affected'}]
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 15, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '31089f4eab42e0fc248ec80c26f9b0bad59ba4cc', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'bc25d56c03e41c10bc4b40e99ca5d7b941675c04', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '845a9cdd9b03b7b6fa8de3ee80579780350a7f65', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': 'df07003b5a6c6c9fce60d765d6a3da815a74c41c', 'versionType': 'git'}, {'status': 'affected', 'version': 'c1fa347f20f17f14a4a1575727fa24340e8a9117', 'lessThan': '0565052b7e2f436b7f1541f4849da96dc0aa7a0e', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/intel/igbvf/netdev.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.33'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.33', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/intel/igbvf/netdev.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: igbvf: Fix leak in TX DMA error cleanup If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb. Because count is incremented before each frag mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping (the head) would leak. This bug was introduced by a 2010 fix for an endless loop in dma_error. All other affected drivers have already been fixed.
    Added Reference https://git.kernel.org/stable/c/0565052b7e2f436b7f1541f4849da96dc0aa7a0e
    Added Reference https://git.kernel.org/stable/c/31089f4eab42e0fc248ec80c26f9b0bad59ba4cc
    Added Reference https://git.kernel.org/stable/c/845a9cdd9b03b7b6fa8de3ee80579780350a7f65
    Added Reference https://git.kernel.org/stable/c/bc25d56c03e41c10bc4b40e99ca5d7b941675c04
    Added Reference https://git.kernel.org/stable/c/df07003b5a6c6c9fce60d765d6a3da815a74c41c
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact