7.5

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

Received
AliasesUBUNTU-CVE-2026-74626DEBIAN-CVE-2026-74626
Published 22-08-2026Last modified 16-10-2026

Vulnerability summary

CVE-2026-74626 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 43% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 05-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.50%
0%100%
Low · -0.21 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 1
USN-8886-1USN-8959-1USN-8960-1USN-8961-1USN-8962-1USN-8963-1

Timeline

  1. 22-08-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

Decrease -0.21 pp

From 0.72% on 06-10-2026

06-10-202605-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-202.212 | < 7.0.0-42.42
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1119.126 | < 7.0.0-1016.17
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.107-1 | < 7.1.9-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ 548c237c0a9972df5d1afaca38aa733ee577128d, < 6d7f8a23c130d768c0976c2578b214353674e18f | ≥ 548c237c0a9972df5d1afaca38aa733ee577128d, < 18781cc0bfb5c7f2a51ac6d678a28f101b7c35c5 | ≥ 548c237c0a9972df5d1afaca38aa733ee577128d, < 272df0fbe6f3e04e22bc67fbdd9ac24586b942f4 | ≥ 548c237c0a9972df5d1afaca38aa733ee577128d, < fcaf8ba7e56bb73319ac107a63b907d59536192c | ≥ 548c237c0a9972df5d1afaca38aa733ee577128d, < 3f2a15f33f86f7bd5b920669fd40c06725d72a1e | ≥ 548c237c0a9972df5d1afaca38aa733ee577128d, < a4e340971fe8ccd245d206db4d43b2a0eec240bd | ≥ 548c237c0a9972df5d1afaca38aa733ee577128d, < 755fd7843f300d724caceabdf9bb13adc8701540 | ≥ 548c237c0a9972df5d1afaca38aa733ee577128d, < d2121faf133ac3bf9531b53a7e21273649a08517 | 3.9

3 vendors · 172 products

References

16 links
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