CVE-2026-72017
net: macb: drop in-flight Tx SKBs on close
Description
In the Linux kernel, the following vulnerability has been resolved: net: macb: drop in-flight Tx SKBs on close The MACB driver has since forever leaked the outgoing SKBs that have not yet been marked as completed. They live in queue->tx_skb which gets freed without remorse nor checking. macb_free_consistent() gets called in a few codepaths, but only close will trigger the added expressions. In macb_open() and macb_alloc_consistent() failure cases, queues' tx_skb just got allocated and are empty.
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply the patch to the Linux kernel.
- Update the MACB driver.
- Free outgoing SKBs on close.
- Check tx_skb before freeing.
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-2026-72017.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72017 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-2026-72017
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-2026-72017 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72017 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. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '6124bd785073659c99385094657b77382ebce11b', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '2143fdc0ce27adbb1caaa1a97e0bfb9f3750aef4', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '26b131b2d5b55a81ef6182769d28105a870c0eb2', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '109241d9880488aafd8e104832b4d4859ad57244', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '27f575836cfebbf872dec020428742b10650a955', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/cadence/macb_main.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.20'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.20', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/cadence/macb_main.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '6124bd785073659c99385094657b77382ebce11b', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '2143fdc0ce27adbb1caaa1a97e0bfb9f3750aef4', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '26b131b2d5b55a81ef6182769d28105a870c0eb2', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '109241d9880488aafd8e104832b4d4859ad57244', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '27f575836cfebbf872dec020428742b10650a955', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/cadence/macb_main.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.20'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.20', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/cadence/macb_main.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': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '6124bd785073659c99385094657b77382ebce11b', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '2143fdc0ce27adbb1caaa1a97e0bfb9f3750aef4', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '26b131b2d5b55a81ef6182769d28105a870c0eb2', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '109241d9880488aafd8e104832b4d4859ad57244', 'versionType': 'git'}, {'status': 'affected', 'version': '89e5785fc8a6b9eafd37f2318a9a76d479c796be', 'lessThan': '27f575836cfebbf872dec020428742b10650a955', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/cadence/macb_main.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.20'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.20', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/cadence/macb_main.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: net: macb: drop in-flight Tx SKBs on close The MACB driver has since forever leaked the outgoing SKBs that have not yet been marked as completed. They live in queue->tx_skb which gets freed without remorse nor checking. macb_free_consistent() gets called in a few codepaths, but only close will trigger the added expressions. In macb_open() and macb_alloc_consistent() failure cases, queues' tx_skb just got allocated and are empty. Added Reference https://git.kernel.org/stable/c/109241d9880488aafd8e104832b4d4859ad57244 Added Reference https://git.kernel.org/stable/c/2143fdc0ce27adbb1caaa1a97e0bfb9f3750aef4 Added Reference https://git.kernel.org/stable/c/26b131b2d5b55a81ef6182769d28105a870c0eb2 Added Reference https://git.kernel.org/stable/c/27f575836cfebbf872dec020428742b10650a955 Added Reference https://git.kernel.org/stable/c/6124bd785073659c99385094657b77382ebce11b