CVE-2026-68129· NVD / CVE Program· CNA Linux

gve: fix Rx queue stall on alloc failure

Noroxi assessment

Priority: Monitor (action score 30/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.51% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: Linux Linux 0c317349b4baa5038d1fc373bf46d5a2419d1710, 299d5728a7312fdd02059b074aebbe4ebbd391e4, 42d525e751c61b876b2b0ae4e71ba7a8ab0c2777; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0c317349b4baa5038d1fc373bf46d5a2419d1710, 299d5728a7312fdd02059b074aebbe4ebbd391e4, 42d525e751c61b876b2b0ae4e71ba7a8ab0c2777; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.5 · v3.1—No exploit Fix available

Published: Aug 10, 2026
Updated: Oct 19, 2026
EPSS: 0.5% · 42th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.5%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · Linux: 7.5; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 5.14affected
- 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 and later · before 9db46e19e5d6bdcd4bf811284a5b0df1b984ef80affected · git
- 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 and later · before 42d525e751c61b876b2b0ae4e71ba7a8ab0c2777affected · git
- 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 and later · before 299d5728a7312fdd02059b074aebbe4ebbd391e4affected · git
- 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 and later · before 0c317349b4baa5038d1fc373bf46d5a2419d1710affected · git
- 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 and later · before 91e0249f3ef62b75fe8c9c9372eaba32876e4b3aaffected · git
- 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 and later · before 689b9f588d2d7323dc66293fe594a68d030f400faffected · git
- 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 and later · before b65352a1bac64442ad95e64f385b40ccb9f1b0dbaffected · git
- before 5.14not affected · semver
- 5.15.216 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.187-1	6.1.187-1
Debian:12	linux-6.12	before 6.12.101-1~deb12u1	6.12.101-1~deb12u1
Debian:13	linux	before 6.12.101-1	6.12.101-1
Debian:14	linux	before 7.1.6-1	7.1.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
40Plan
CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
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CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
40Plan

Published before and after this one in the same product

← EarlierCVE-2026-68127Aug 10, 2026 · ila: reload IPv6 header after pskb_may_pull in checksum adjust
39Monitor
← EarlierCVE-2026-68128Aug 10, 2026 · ice: reject out-of-range ptype in ice_parser_profile_init
35Monitor
Later →CVE-2026-68131Aug 10, 2026 · rbd: Reset positive result codes to zero in object map update path
30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	0c317349b4baa5038d1fc373bf46d5a2419d1710	Vendor (CNA)
Linux Linux	299d5728a7312fdd02059b074aebbe4ebbd391e4	Vendor (CNA)
Linux Linux	42d525e751c61b876b2b0ae4e71ba7a8ab0c2777	Vendor (CNA)
Linux Linux	689b9f588d2d7323dc66293fe594a68d030f400f	Vendor (CNA)
Linux Linux	91e0249f3ef62b75fe8c9c9372eaba32876e4b3a	Vendor (CNA)
Linux Linux	9db46e19e5d6bdcd4bf811284a5b0df1b984ef80	Vendor (CNA)
Linux Linux	b65352a1bac64442ad95e64f385b40ccb9f1b0db	Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0	6.6.152.1-1 · Release Notes	Microsoft (MSRC)
debian:linux	6.1.187-1 · Debian:12	Package registry (OSV)
debian:linux-6.12	6.12.101-1~deb12u1 · Debian:12	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-6397422 days apartBluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close
35Monitor
CVE-2026-684250 days apartIB/mad: Drop unmatched RMPP responses before reassembly
28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-26-0800 · Aug 11, 2026(Linux Kernel Güvenlik Bildirimi)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

SSVC exploitation— → noneOct 16, 2026, 5:07 PM UTC
Fix✗ → ✓Sep 28, 2026, 10:07 PM UTC

For records you follow, these changes also arrive as notifications. →

References

git.kernel.org/stable/c/0c317349b4baa5038d1fc373bf46d5a2419d1710

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records