CVE-2026-74626
NTB: ntb_netdev: Preserve RX queue depth on allocation failure
Description
In the Linux kernel, the following vulnerability has been resolved: NTB: ntb_netdev: Preserve RX queue depth on allocation failure ntb_netdev_rx_handler() hands the received skb to the network stack before allocating its replacement. If the allocation fails, nothing is reposted. Every failure therefore takes one buffer out of the RX queue while the interface remains up, and enough failures eventually stall reception. A retry path could refill the queue later, but ntb_netdev has none. Allocate the replacement first instead. If that fails, drop the packet and repost the same skb. This keeps the queue full and lets packet delivery resume as soon as memory is available again.
INFO
Published Date :
Aug. 22, 2026, 4:16 p.m.
Last Modified :
Aug. 27, 2026, 1:18 p.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Allocate replacement buffers before processing received packets.
- If allocation fails, drop the packet and repost the original skb.
- This maintains queue depth and allows reception to resume.
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-2026-74626.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74626 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-2026-74626
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-2026-74626 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74626 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.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 27, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/74xxx/CVE-2026-74626.json">CVE-2026-74626</a> Added Reference https://git.kernel.org/stable/c/18781cc0bfb5c7f2a51ac6d678a28f101b7c35c5 Added Reference https://git.kernel.org/stable/c/272df0fbe6f3e04e22bc67fbdd9ac24586b942f4 Added Reference https://git.kernel.org/stable/c/3f2a15f33f86f7bd5b920669fd40c06725d72a1e Added Reference https://git.kernel.org/stable/c/6d7f8a23c130d768c0976c2578b214353674e18f Added Reference https://git.kernel.org/stable/c/755fd7843f300d724caceabdf9bb13adc8701540 Added Reference https://git.kernel.org/stable/c/a4e340971fe8ccd245d206db4d43b2a0eec240bd Added Reference https://git.kernel.org/stable/c/d2121faf133ac3bf9531b53a7e21273649a08517 Added Reference https://git.kernel.org/stable/c/fcaf8ba7e56bb73319ac107a63b907d59536192c Removed Reference https://git.kernel.org/stable/c/755fd7843f300d724caceabdf9bb13adc8701540 Removed Reference https://git.kernel.org/stable/c/a4e340971fe8ccd245d206db4d43b2a0eec240bd Removed Reference https://git.kernel.org/stable/c/d2121faf133ac3bf9531b53a7e21273649a08517 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 25, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 23, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/a4e340971fe8ccd245d206db4d43b2a0eec240bd Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '548c237c0a9972df5d1afaca38aa733ee577128d', 'lessThan': '755fd7843f300d724caceabdf9bb13adc8701540', 'versionType': 'git'}, {'status': 'affected', 'version': '548c237c0a9972df5d1afaca38aa733ee577128d', 'lessThan': 'd2121faf133ac3bf9531b53a7e21273649a08517', 'versionType': 'git'}], 'programFiles': ['drivers/net/ntb_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': '3.9'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.9', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1.9', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ntb_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': '548c237c0a9972df5d1afaca38aa733ee577128d', 'lessThan': 'a4e340971fe8ccd245d206db4d43b2a0eec240bd', 'versionType': 'git'}, {'status': 'affected', 'version': '548c237c0a9972df5d1afaca38aa733ee577128d', 'lessThan': '755fd7843f300d724caceabdf9bb13adc8701540', 'versionType': 'git'}, {'status': 'affected', 'version': '548c237c0a9972df5d1afaca38aa733ee577128d', 'lessThan': 'd2121faf133ac3bf9531b53a7e21273649a08517', 'versionType': 'git'}], 'programFiles': ['drivers/net/ntb_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': '3.9'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.9', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.46', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.9', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ntb_netdev.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 22, 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': '548c237c0a9972df5d1afaca38aa733ee577128d', 'lessThan': '755fd7843f300d724caceabdf9bb13adc8701540', 'versionType': 'git'}, {'status': 'affected', 'version': '548c237c0a9972df5d1afaca38aa733ee577128d', 'lessThan': 'd2121faf133ac3bf9531b53a7e21273649a08517', 'versionType': 'git'}], 'programFiles': ['drivers/net/ntb_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': '3.9'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.9', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1.9', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ntb_netdev.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: NTB: ntb_netdev: Preserve RX queue depth on allocation failure ntb_netdev_rx_handler() hands the received skb to the network stack before allocating its replacement. If the allocation fails, nothing is reposted. Every failure therefore takes one buffer out of the RX queue while the interface remains up, and enough failures eventually stall reception. A retry path could refill the queue later, but ntb_netdev has none. Allocate the replacement first instead. If that fails, drop the packet and repost the same skb. This keeps the queue full and lets packet delivery resume as soon as memory is available again. Added Reference https://git.kernel.org/stable/c/755fd7843f300d724caceabdf9bb13adc8701540 Added Reference https://git.kernel.org/stable/c/d2121faf133ac3bf9531b53a7e21273649a08517