CVE-2025-37823

net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too

HIGH
7.8
CVSS Score
Published: May 8, 2025 at 06:26 AM UTC
Updated: October 15, 2026 at 10:18 PM UTC
2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.6.13 ≤ v < 5.4.2935.11 ≤ v < 5.15.1815.16 ≤ v < 6.1.1365.5 ≤ v < 5.10.2376.13 ≤ v < 6.14.56.2 ≤ v < 6.6.896.7 ≤ v < 6.12.261da177e4c3f41524e886b7f1b8a0c1fc7321cac22.6.122.6.12 rc22.6.12 rc32.6.12 rc42.6.12 rc56.156.15 rc16.15 rc26.15 rc3
Vendor states this is fixed in 11bccb054c1462fb069219f8e98e97a5a730758e (fixed)
Vendor states this is fixed in 2f46d14919c39528c6e540ebc43f90055993eedc (fixed)
Vendor states this is fixed in 68f256305ceb426d545a0dc31f83c2ab1d211a1e (fixed)
Vendor states this is fixed in 6ccbda44e2cc3d26fd22af54c650d6d5d801addf (fixed)
Vendor states this is fixed in 76c4c22c2437d3d3880efc0f62eca06ef078d290 (fixed)
Vendor states this is fixed in c6936266f8bf98a53f28ef9a820e6a501e946d09 (fixed)
Vendor states this is fixed in c6f035044104c6ff656f4565cd22938dc892528c (fixed)
Vendor states this is fixed in da7936518996d290e2fcfcaf6cd7e15bfd87804a (fixed)
Vendor states this is fixed in 2.6.12 (unaffected)
Vendor states this is fixed in 5.10.237 (unaffected)
Vendor states this is fixed in 5.15.181 (unaffected)
Vendor states this is fixed in 5.4.293 (unaffected)
Vendor states this is fixed in 6.1.136 (unaffected)
Vendor states this is fixed in 6.12.26 (unaffected)
Vendor states this is fixed in 6.14.5 (unaffected)
Vendor states this is fixed in 6.15 (unaffected)
Vendor states this is fixed in 6.6.89 (unaffected)

References (10)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/11bccb054c1462fb069219f8e98e97a5a730758e
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/2f46d14919c39528c6e540ebc43f90055993eedc
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/68f256305ceb426d545a0dc31f83c2ab1d211a1e
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6ccbda44e2cc3d26fd22af54c650d6d5d801addf
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/76c4c22c2437d3d3880efc0f62eca06ef078d290
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c6936266f8bf98a53f28ef9a820e6a501e946d09
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c6f035044104c6ff656f4565cd22938dc892528c
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/da7936518996d290e2fcfcaf6cd7e15bfd87804a

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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