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7.8
HIGH CVSS 3.1
CVE-2025-37823
net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too
Description

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.

INFO

Published Date :

May 8, 2025, 7:15 a.m.

Last Modified :

Nov. 10, 2025, 3:52 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-37823 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
1 Debian debian_linux
: Total Affected Vendor : 2 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
Solution
Update the Linux kernel to the latest version to fix the UAF vulnerability.
  • Update the Linux kernel to the latest version.
  • Apply the provided patch for net_sched: hfsc.
  • Reboot the system after applying updates.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-37823.

URL Resource
https://git.kernel.org/stable/c/11bccb054c1462fb069219f8e98e97a5a730758e Patch
https://git.kernel.org/stable/c/2f46d14919c39528c6e540ebc43f90055993eedc Patch
https://git.kernel.org/stable/c/68f256305ceb426d545a0dc31f83c2ab1d211a1e Patch
https://git.kernel.org/stable/c/6ccbda44e2cc3d26fd22af54c650d6d5d801addf Patch
https://git.kernel.org/stable/c/76c4c22c2437d3d3880efc0f62eca06ef078d290 Patch
https://git.kernel.org/stable/c/c6936266f8bf98a53f28ef9a820e6a501e946d09 Patch
https://git.kernel.org/stable/c/c6f035044104c6ff656f4565cd22938dc892528c Patch
https://git.kernel.org/stable/c/da7936518996d290e2fcfcaf6cd7e15bfd87804a Patch
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html Mailing List Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-37823 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-37823 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-37823 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-37823 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Nov. 10, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-416
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.14.5 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.13 up to (excluding) 5.4.293 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.237 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.181 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.136 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.89 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.26 *cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/11bccb054c1462fb069219f8e98e97a5a730758e Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/2f46d14919c39528c6e540ebc43f90055993eedc Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/68f256305ceb426d545a0dc31f83c2ab1d211a1e Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/6ccbda44e2cc3d26fd22af54c650d6d5d801addf Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/76c4c22c2437d3d3880efc0f62eca06ef078d290 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/c6936266f8bf98a53f28ef9a820e6a501e946d09 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/c6f035044104c6ff656f4565cd22938dc892528c Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/da7936518996d290e2fcfcaf6cd7e15bfd87804a Types: Patch
    Added Reference Type CVE: https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html Types: Mailing List, Third Party Advisory
    Added Reference Type CVE: https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html Types: Mailing List, Third Party Advisory
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 03, 2025

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
    Added Reference https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 08, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added Reference https://git.kernel.org/stable/c/11bccb054c1462fb069219f8e98e97a5a730758e
    Added Reference https://git.kernel.org/stable/c/2f46d14919c39528c6e540ebc43f90055993eedc
    Added Reference https://git.kernel.org/stable/c/68f256305ceb426d545a0dc31f83c2ab1d211a1e
    Added Reference https://git.kernel.org/stable/c/6ccbda44e2cc3d26fd22af54c650d6d5d801addf
    Added Reference https://git.kernel.org/stable/c/76c4c22c2437d3d3880efc0f62eca06ef078d290
    Added Reference https://git.kernel.org/stable/c/c6936266f8bf98a53f28ef9a820e6a501e946d09
    Added Reference https://git.kernel.org/stable/c/c6f035044104c6ff656f4565cd22938dc892528c
    Added Reference https://git.kernel.org/stable/c/da7936518996d290e2fcfcaf6cd7e15bfd87804a
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact