01 Record

CVE-2026-74696

tcp: fix TFO max_qlen accounting across reuseport migration

HighPUBLISHEDCNA: Linux

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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02 Description

tcp: fix TFO max_qlen accounting across reuseport migration

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.49% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 41.8% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Received. NVD last modified this record on 2026-10-16.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-08-22 15:32Z2 MO AGO

Last updated

2026-10-16 19:16Z13 DAYS AGO

Reserved

2026-08-15

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CWE-191Integer Underflow (Wrap or Wraparound)Base

Data version

5.2

Document digest

bbf7e0233d4740fb7546033adc25de4393e1ac2b90053b265850db081ffa5342

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux54b92e84193749c9968aff2dd46e3b0f42643e18 to < e98f0d80b9cccb5f828425d2004f9686e7d1ae24, 54b92e84193749c9968aff2dd46e3b0f42643e18 to < b6247e0f96bd825ffb2005257f6177b5e642dee6, 54b92e84193749c9968aff2dd46e3b0f42643e18 to < 585fc5247d14939a561056aa2addd9b7c2b1f670, 54b92e84193749c9968aff2dd46e3b0f42643e18 to < 6e10ee56524a26b250229ad348637825646ddb88, 54b92e84193749c9968aff2dd46e3b0f42643e18 to < a66e869cf0c90c1e47ae75f72b6482acbfc808ff, 54b92e84193749c9968aff2dd46e3b0f42643e18 to < d974618b2097453778389d385e3741629c40e0a3, 54b92e84193749c9968aff2dd46e3b0f42643e18 to < a0ab2ba83e35159d81cec830a92e885ecf8139be, 5.14—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/e98f0d80b9cccb5f828425d2004f9686e7d1ae24
git.kernel.orghttps://git.kernel.org/stable/c/b6247e0f96bd825ffb2005257f6177b5e642dee6
git.kernel.orghttps://git.kernel.org/stable/c/585fc5247d14939a561056aa2addd9b7c2b1f670
git.kernel.orghttps://git.kernel.org/stable/c/6e10ee56524a26b250229ad348637825646ddb88
git.kernel.orghttps://git.kernel.org/stable/c/a66e869cf0c90c1e47ae75f72b6482acbfc808ff
git.kernel.orghttps://git.kernel.org/stable/c/d974618b2097453778389d385e3741629c40e0a3
git.kernel.orghttps://git.kernel.org/stable/c/a0ab2ba83e35159d81cec830a92e885ecf8139be

07 Fixed in

Debian 12

linux
Fixed in 6.1.187-1
linux-6.12
Fixed in 6.12.107-1~deb12u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.105-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 7.1.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.