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Review reviewHigh

CVE-2025-37752

Linux Linux, linux kernel, debian linux

In the Linux kernel, the following vulnerability has been resolved: net_sched: sch_sfq: move the limit validation It is not sufficient to directly validate the limit on the data that the user passes as it can be updated based on how the other parameters are changed. Move the check at the end of the configuration update process to also catch scenarios where the limit is indirectly updated, for example with the following configurations: tc qdisc add dev dummy0 handle 1: root sfq limit 2 flows 1 depth 1 tc qdisc add dev dummy0 handle 1: root sfq limit 2 flows 1 divisor 1 This fixes the followi...

CVSS
7.8
EPSS
0.25%
16.6% percentile
CISA KEV
Not listed
Published
2025.05.01
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.25%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net_sched: sch_sfq: move the limit validation It is not sufficient to directly validate the limit on the data that the user passes as it can be updated based on how the other parameters are changed. Move the check at the end of the configuration update process to also catch scenarios where the limit is indirectly updated, for example with the following configurations: tc qdisc add dev dummy0 handle 1: root sfq limit 2 flows 1 depth 1 tc qdisc add dev dummy0 handle 1: root sfq limit 2 flows 1 divisor 1 This fixes the followi...

Affected product and versions

Product
Linux Linux, linux kernel, debian linux
Affected versions
>= e12f6013d0a69660e8b99bfe381b9546ae667328 < 8fadc871a42933aacb7f1ce9ed9a96485e2c9cf4, >= 1e6d9d87626cf89eeffb4d943db12cb5b10bf961 < 7d62ded97db6b7c94c891f704151f372b1ba4688, >= 1b562b7f9231432da40d12e19786c1bd7df653a7 < 6c589aa318023690f1606c666a7fb5f4c1c9c219, >= 35d0137305ae2f97260a9047f445bd4434bd6cc7 < 1348214fa042a71406964097e743c87a42c85a49, >= 833e9a1c27b82024db7ff5038a51651f48f05e5e < d2718324f9e329b10ddc091fba5a0ba2b9d4d96a, >= 7d8947f2153ee9c5ab4cb17861a11cc45f30e8c4 < f86293adce0c201cfabb283ef9d6f21292089bb8, >= 7fefc294204f10a3405f175f4ac2be16d63f135e < 5e5e1fcc1b8ed57f902c424c5d9b328a3a19073d, >= 10685681bafce6febb39770f3387621bf5d67d0b < b36a68192037d1614317a09b0d78c7814e2eecf9, >= 10685681bafce6febb39770f3387621bf5d67d0b < b3bf8f63e6179076b57c9de660c9f80b5abefe70, >= 6.1.129 < 6.1.135, >= 6.6.76 < 6.6.88, >= 6.12.13 < 6.12.24, >= 6.13.2 < 6.13.12, >= 6.14, >= 6.14 < 6.14.3, 6.15, 11.0
Fixed versions
6.1.135, 6.6.88, 6.12.24, 6.13.12, 6.14.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel, debian 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-129