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Review reviewHigh

CVE-2025-37823

Linux Linux, linux kernel, debian linux

In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too Similarly to the previous patch, we need to safe guard hfsc_dequeue() too. But for this one, we don't have a reliable reproducer.

CVSS
7.8
EPSS
0.19%
8.83% percentile
CISA KEV
Not listed
Published
2025.05.08
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.19%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too Similarly to the previous patch, we need to safe guard hfsc_dequeue() too. But for this one, we don't have a reliable reproducer.

Affected product and versions

Product
Linux Linux, linux kernel, debian linux
Affected versions
>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 68f256305ceb426d545a0dc31f83c2ab1d211a1e, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2f46d14919c39528c6e540ebc43f90055993eedc, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < da7936518996d290e2fcfcaf6cd7e15bfd87804a, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 11bccb054c1462fb069219f8e98e97a5a730758e, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 76c4c22c2437d3d3880efc0f62eca06ef078d290, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c6f035044104c6ff656f4565cd22938dc892528c, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c6936266f8bf98a53f28ef9a820e6a501e946d09, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6ccbda44e2cc3d26fd22af54c650d6d5d801addf, >= 2.6.12, >= 2.6.13 < 5.4.293, >= 5.5 < 5.10.237, >= 5.11 < 5.15.181, >= 5.16 < 6.1.136, >= 6.2 < 6.6.89, >= 6.7 < 6.12.26, >= 6.13 < 6.14.5, 2.6.12, 6.15, 11.0
Fixed versions
5.4.293, 5.10.237, 5.15.181, 6.1.136, 6.6.89, 6.12.26, 6.14.5

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-416
CVE-2025-37823 — Linux Linux, linux kernel, debian linux | SECUFOCUS NOW