CVE-2026-68129
gve: fix Rx queue stall on alloc failure
Description
In the Linux kernel, the following vulnerability has been resolved: gve: fix Rx queue stall on alloc failure When the system is under extreme memory pressure, page allocations can fail during the Rx buffer refill loop. If the number of buffers posted to hardware falls below a critical low threshold and the refill loop exits due to allocation failures, the queue can stall: 1. The device drops incoming packets because there are no descriptors. 2. Since no packets are processed, no Rx completions are generated. 3. Because no completions occur, NAPI is never scheduled, preventing the refill loop from running again even after memory is freed. This results in a permanent queue stall. Resolve this by introducing a starvation recovery timer for each Rx queue. If the number of buffers posted to hardware falls below a critical low threshold, start a timer to periodically reschedule NAPI. Once NAPI runs and successfully refills the queue above the threshold, the timer is not rescheduled. The threshold is set to 32 because a single maximum-sized Receive Segment Coalescing (RSC) packet can consume up to 19 descriptors in the Rx path. Lower thresholds (such as 8 or 16) would be insufficient to process a complete maximum-sized RSC packet, risking packet drops or unexpected hardware behavior under memory pressure. Setting the threshold to 32 guarantees a safe margin to handle at least one full RSC packet.
INFO
Published Date :
Aug. 10, 2026, 1:19 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.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
- Introduce a starvation recovery timer for each Rx queue.
- Start timer if posted buffers fall below critical threshold.
- Reschedule NAPI periodically when timer is active.
- Refill queue above threshold to stop timer.
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-2026-68129.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68129 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-2026-68129
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-2026-68129 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68129 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. 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': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '299d5728a7312fdd02059b074aebbe4ebbd391e4', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '0c317349b4baa5038d1fc373bf46d5a2419d1710', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '91e0249f3ef62b75fe8c9c9372eaba32876e4b3a', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '689b9f588d2d7323dc66293fe594a68d030f400f', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': 'b65352a1bac64442ad95e64f385b40ccb9f1b0db', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/google/gve/gve.h', 'drivers/net/ethernet/google/gve/gve_rx_dqo.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/google/gve/gve.h', 'drivers/net/ethernet/google/gve/gve_rx_dqo.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '299d5728a7312fdd02059b074aebbe4ebbd391e4', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '0c317349b4baa5038d1fc373bf46d5a2419d1710', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '91e0249f3ef62b75fe8c9c9372eaba32876e4b3a', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '689b9f588d2d7323dc66293fe594a68d030f400f', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': 'b65352a1bac64442ad95e64f385b40ccb9f1b0db', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/google/gve/gve.h', 'drivers/net/ethernet/google/gve/gve_rx_dqo.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/google/gve/gve.h', 'drivers/net/ethernet/google/gve/gve_rx_dqo.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 13, 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 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 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': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '299d5728a7312fdd02059b074aebbe4ebbd391e4', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '0c317349b4baa5038d1fc373bf46d5a2419d1710', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '91e0249f3ef62b75fe8c9c9372eaba32876e4b3a', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': '689b9f588d2d7323dc66293fe594a68d030f400f', 'versionType': 'git'}, {'status': 'affected', 'version': '9b8dd5e5ea48bbb7532d20c4093a79d8283e4029', 'lessThan': 'b65352a1bac64442ad95e64f385b40ccb9f1b0db', 'versionType': 'git'}], 'programFiles': ['drivers/net/ethernet/google/gve/gve.h', 'drivers/net/ethernet/google/gve/gve_rx_dqo.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/ethernet/google/gve/gve.h', 'drivers/net/ethernet/google/gve/gve_rx_dqo.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: gve: fix Rx queue stall on alloc failure When the system is under extreme memory pressure, page allocations can fail during the Rx buffer refill loop. If the number of buffers posted to hardware falls below a critical low threshold and the refill loop exits due to allocation failures, the queue can stall: 1. The device drops incoming packets because there are no descriptors. 2. Since no packets are processed, no Rx completions are generated. 3. Because no completions occur, NAPI is never scheduled, preventing the refill loop from running again even after memory is freed. This results in a permanent queue stall. Resolve this by introducing a starvation recovery timer for each Rx queue. If the number of buffers posted to hardware falls below a critical low threshold, start a timer to periodically reschedule NAPI. Once NAPI runs and successfully refills the queue above the threshold, the timer is not rescheduled. The threshold is set to 32 because a single maximum-sized Receive Segment Coalescing (RSC) packet can consume up to 19 descriptors in the Rx path. Lower thresholds (such as 8 or 16) would be insufficient to process a complete maximum-sized RSC packet, risking packet drops or unexpected hardware behavior under memory pressure. Setting the threshold to 32 guarantees a safe margin to handle at least one full RSC packet. Added Reference https://git.kernel.org/stable/c/0c317349b4baa5038d1fc373bf46d5a2419d1710 Added Reference https://git.kernel.org/stable/c/299d5728a7312fdd02059b074aebbe4ebbd391e4 Added Reference https://git.kernel.org/stable/c/689b9f588d2d7323dc66293fe594a68d030f400f Added Reference https://git.kernel.org/stable/c/91e0249f3ef62b75fe8c9c9372eaba32876e4b3a Added Reference https://git.kernel.org/stable/c/b65352a1bac64442ad95e64f385b40ccb9f1b0db