CVE-2026-68129gve: fix Rx queue stall on alloc failure
- 7.5HighCVSS base score
- 0.51%Exploitation in 30 daysEPSS · top 56% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Received | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.51% · top 56% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 – < 9db46e19e5d6bdcd4bf811284a5b0df1b984ef80
- affected 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 – < 42d525e751c61b876b2b0ae4e71ba7a8ab0c2777
- affected 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 – < 299d5728a7312fdd02059b074aebbe4ebbd391e4
- affected 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 – < 0c317349b4baa5038d1fc373bf46d5a2419d1710
- affected 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 – < 91e0249f3ef62b75fe8c9c9372eaba32876e4b3a
- affected 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 – < 689b9f588d2d7323dc66293fe594a68d030f400f
- affected 9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 – < b65352a1bac64442ad95e64f385b40ccb9f1b0db
- affected 5.14
- unaffected < 5.14
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.151 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References7
- https://git.kernel.org/stable/c/9db46e19e5d6bdcd4bf811284a5b0df1b984ef80 (opens in a new tab)
- https://git.kernel.org/stable/c/42d525e751c61b876b2b0ae4e71ba7a8ab0c2777 (opens in a new tab)
- https://git.kernel.org/stable/c/299d5728a7312fdd02059b074aebbe4ebbd391e4 (opens in a new tab)
- https://git.kernel.org/stable/c/0c317349b4baa5038d1fc373bf46d5a2419d1710 (opens in a new tab)
- https://git.kernel.org/stable/c/91e0249f3ef62b75fe8c9c9372eaba32876e4b3a (opens in a new tab)
- https://git.kernel.org/stable/c/689b9f588d2d7323dc66293fe594a68d030f400f (opens in a new tab)
- https://git.kernel.org/stable/c/b65352a1bac64442ad95e64f385b40ccb9f1b0db (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55510 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-68129)Record last updated .