High 7.5Published Aug 22, 2026

CVE-2026-74626NTB: ntb_netdev: Preserve RX queue depth on allocation failure

Updated under an hour ago (Oct 28, 2026, 5:50 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	548c237c0a9972df5d1afaca38aa733ee577128d builds before 6d7f8a23c130d768c0976c2578b214353674e18f; from 548c237c0a9972df5d1afaca38aa733ee577128d before 18781cc0bfb5c7f2a51ac6d678a28f101b7c35c5; 548c237c0a9972df5d1afaca38aa733ee577128d builds before 272df0fbe6f3e04e22bc67fbdd9ac24586b942f4; from 548c237c0a9972df5d1afaca38aa733ee577128d before fcaf8ba7e56bb73319ac107a63b907d59536192c; 548c237c0a9972df5d1afaca38aa733ee577128d builds before 3f2a15f33f86f7bd5b920669fd40c06725d72a1e; from 548c237c0a9972df5d1afaca38aa733ee577128d before a4e340971fe8ccd245d206db4d43b2a0eec240bd; from 548c237c0a9972df5d1afaca38aa733ee577128d before 755fd7843f300d724caceabdf9bb13adc8701540; from 548c237c0a9972df5d1afaca38aa733ee577128d before d2121faf133ac3bf9531b53a7e21273649a08517	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.