SECUFOCUSNOW
Home›CVE index›CVE-2026-74626
ReviewHigh

CVE-2026-74626

Linux

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 t...

CVSS
7.5
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.08.23
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.5

Vulnerability overview

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 t...

Affected product and versions

Product
Linux
Affected versions
>= 548c237c0a9972df5d1afaca38aa733ee577128d < 6d7f8a23c130d768c0976c2578b214353674e18f, >= 548c237c0a9972df5d1afaca38aa733ee577128d < 18781cc0bfb5c7f2a51ac6d678a28f101b7c35c5, >= 548c237c0a9972df5d1afaca38aa733ee577128d < 272df0fbe6f3e04e22bc67fbdd9ac24586b942f4, >= 548c237c0a9972df5d1afaca38aa733ee577128d < fcaf8ba7e56bb73319ac107a63b907d59536192c, >= 548c237c0a9972df5d1afaca38aa733ee577128d < 3f2a15f33f86f7bd5b920669fd40c06725d72a1e, >= 548c237c0a9972df5d1afaca38aa733ee577128d < a4e340971fe8ccd245d206db4d43b2a0eec240bd, >= 548c237c0a9972df5d1afaca38aa733ee577128d < 755fd7843f300d724caceabdf9bb13adc8701540, >= 548c237c0a9972df5d1afaca38aa733ee577128d < d2121faf133ac3bf9531b53a7e21273649a08517, >= 3.9
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Not available