net: sched: fix use-after-free in taprio_change()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-50127
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-11-05 18:15:15 UTC
Updated2026-05-12 13:16:17 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: sched: fix use-after-free in taprio_change() In 'taprio_change()', 'admin' pointer may become dangling due to sched switch / removal caused by 'advance_sched()', and critical section protected by 'q->current_entry_lock' is too small to prevent from such a scenario (which causes use-after-free detected by KASAN). Fix this by prefer 'rcu_replace_pointer()' over 'rcu_assign_pointer()' to update 'admin' immediately before an attempt to schedule freeing.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

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

Problem Types: CWE-416 | CWE-416 CWE-416 Use After Free

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1ADPDECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 a3d43c0d56f1b94e74963a2fbadfb70126d92213 2f868ce6013548a713c431c679ef73747a66fcf3 git Not specified
CNA Linux Linux affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 8a283a19026aaae8a773fd8061263cfa315b127f git Not specified
CNA Linux Linux affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 999612996df28d81f163dad530d7f8026e03aec6 git Not specified
CNA Linux Linux affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 fe371f084073e8672a2d7d46b335c3c060d1e301 git Not specified
CNA Linux Linux affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 0d4c0d2844e4eac3aed647f948fd7e60eea56a61 git Not specified
CNA Linux Linux affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 2240f9376f20f8b6463232b4ca7292569217237f git Not specified
CNA Linux Linux affected a3d43c0d56f1b94e74963a2fbadfb70126d92213 f504465970aebb2467da548f7c1efbbf36d0f44b git Not specified
CNA Linux Linux affected 5.2 Not specified
CNA Linux Linux unaffected 5.2 semver Not specified
CNA Linux Linux unaffected 5.4.285 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.229 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.170 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.115 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.59 6.6.* semver Not specified
CNA Linux Linux unaffected 6.11.6 6.11.* semver Not specified
CNA Linux Linux unaffected 6.12 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/03/msg00002.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/2240f9376f20f8b6463232b4ca7292569217237f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0d4c0d2844e4eac3aed647f948fd7e60eea56a61 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2f868ce6013548a713c431c679ef73747a66fcf3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/999612996df28d81f163dad530d7f8026e03aec6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8a283a19026aaae8a773fd8061263cfa315b127f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/fe371f084073e8672a2d7d46b335c3c060d1e301 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/01/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/f504465970aebb2467da548f7c1efbbf36d0f44b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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