net/sched: sch_qfq: Fix race condition on qfq_aggregate

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-38477
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-07-28 12:15:29 UTC
Updated2026-05-12 13:16:51 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.

Risk And Classification

Primary CVSS: v3.1 4.7 MEDIUM from [email protected]

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

Problem Types: CWE-362

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd aa7a22c4d678bf649fd3a1d27debec583563414d git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd d841aa5518508ab195b6781ad0d73ee378d713dd git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd c6df794000147a3a02f79984aada4ce83f8d0a1e git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd 466e10194ab81caa2ee6a332d33ba16bcceeeba6 git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd fbe48f06e64134dfeafa89ad23387f66ebca3527 git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd a6d735100f602c830c16d69fb6d780eebd8c9ae1 git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd c000a3a330d97f6c073ace5aa5faf94b9adb4b79 git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd 5e28d5a3f774f118896aec17a3a20a9c5c9dfc64 git Not specified
CNA Linux Linux affected 3.8 Not specified
CNA Linux Linux unaffected 3.8 semver Not specified
CNA Linux Linux unaffected 5.4.297 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.241 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.190 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.147 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.100 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.40 6.12.* semver Not specified
CNA Linux Linux unaffected 6.15.8 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/466e10194ab81caa2ee6a332d33ba16bcceeeba6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/fbe48f06e64134dfeafa89ad23387f66ebca3527 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-082556.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/c6df794000147a3a02f79984aada4ce83f8d0a1e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5e28d5a3f774f118896aec17a3a20a9c5c9dfc64 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/aa7a22c4d678bf649fd3a1d27debec583563414d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c000a3a330d97f6c073ace5aa5faf94b9adb4b79 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d841aa5518508ab195b6781ad0d73ee378d713dd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a6d735100f602c830c16d69fb6d780eebd8c9ae1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00007.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
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