CVE-2026-74626

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux548c237c0a9972df5d1afaca38aa733ee577128d < 6d7f8a23c130d768c0976c2578b214353674e18faffected
LinuxLinux548c237c0a9972df5d1afaca38aa733ee577128d < 18781cc0bfb5c7f2a51ac6d678a28f101b7c35c5affected
LinuxLinux548c237c0a9972df5d1afaca38aa733ee577128d < 272df0fbe6f3e04e22bc67fbdd9ac24586b942f4affected
LinuxLinux548c237c0a9972df5d1afaca38aa733ee577128d < fcaf8ba7e56bb73319ac107a63b907d59536192caffected
LinuxLinux548c237c0a9972df5d1afaca38aa733ee577128d < 3f2a15f33f86f7bd5b920669fd40c06725d72a1eaffected
LinuxLinux548c237c0a9972df5d1afaca38aa733ee577128d < a4e340971fe8ccd245d206db4d43b2a0eec240bdaffected
LinuxLinux548c237c0a9972df5d1afaca38aa733ee577128d < 755fd7843f300d724caceabdf9bb13adc8701540affected
LinuxLinux548c237c0a9972df5d1afaca38aa733ee577128d < d2121faf133ac3bf9531b53a7e21273649a08517affected
LinuxLinux3.9affected
LinuxLinux0 < 3.9unaffected
LinuxLinux5.10.267 <= 5.10.*unaffected
LinuxLinux5.15.218 <= 5.15.*unaffected
LinuxLinux6.1.185 <= 6.1.*unaffected
LinuxLinux6.6.154 <= 6.6.*unaffected
LinuxLinux6.12.106 <= 6.12.*unaffected
LinuxLinux6.18.46 <= 6.18.*unaffected
LinuxLinux7.1.9 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References