CVE-2026-74626

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/18781cc0bfb5c7f2a51ac6d678a28f101b7c35c5
https://git.kernel.org/stable/c/272df0fbe6f3e04e22bc67fbdd9ac24586b942f4
https://git.kernel.org/stable/c/3f2a15f33f86f7bd5b920669fd40c06725d72a1e
https://git.kernel.org/stable/c/6d7f8a23c130d768c0976c2578b214353674e18f
https://git.kernel.org/stable/c/755fd7843f300d724caceabdf9bb13adc8701540
https://git.kernel.org/stable/c/a4e340971fe8ccd245d206db4d43b2a0eec240bd
https://git.kernel.org/stable/c/d2121faf133ac3bf9531b53a7e21273649a08517
https://git.kernel.org/stable/c/fcaf8ba7e56bb73319ac107a63b907d59536192c

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-22 16:16

Updated : 2026-08-27 13:18

NVD link : CVE-2026-74626

Mitre link : CVE-2026-74626

CVE.ORG link : CVE-2026-74626

JSON object : View

Products Affected

No product.

CWE

No CWE.

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If the allocation fails, nothing is\nreposted. Every failure therefore takes one buffer out of the RX queue\nwhile the interface remains up, and enough failures eventually stall\nreception.\n\nA retry path could refill the queue later, but ntb_netdev has none.\nAllocate the replacement first instead. If that fails, drop the packet\nand repost the same skb. This keeps the queue full and lets packet\ndelivery resume as soon as memory is available again."}], "lastModified": "2026-08-27T13:18:34.740", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}