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CVE-2025-37992· NVD / CVE Program· CNA Linux

net_sched: Flush gso_skb list too during ->change()

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.20% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8, a7d6e0ac0a8861f6b1027488062251a8e28150fd, d1365ca80b012d8a7863e45949e413fb61fa4861; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1.

Low priority for now. Upgrade to Linux Linux 2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8, a7d6e0ac0a8861f6b1027488062251a8e28150fd, d1365ca80b012d8a7863e45949e413fb61fa4861; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: net_sched: Flush gso_skb list too during ->change() Previously, when reducing a qdisc's limit via the ->change() operation, only the main skb queue was trimmed, potentially leaving packets in the gso_skb list. This could result in NULL pointer dereference when we only check sch->limit against sch->q.qlen. This patch introduces a new helper, qdisc_dequeue_internal(), which ensures both the gso_skb list and the main queue are properly flushed when trimming excess packets. All relevant qdiscs (codel, fq, fq_codel, fq_pie, hhf, pie) are updated to use this helper in their ->change() routines.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 26, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 10th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux11.0
  • linux linux kernel5.11 and later · before 5.15.184
  • linux linux kernel5.16 and later · before 6.1.140
  • linux linux kernel6.2 and later · before 6.6.92
  • linux linux kernel3.5 and later · before 5.10.238
  • linux linux kernel6.13 and later · before 6.14.8
  • linux linux kernel6.7 and later · before 6.12.30
  • linux linux kernel6.15

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.5affected
    • 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 and later · before ea1132ccb112f51ba749c56a912f67970c2cd542affected · git
    • 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 and later · before d3336f746f196c6a53e0480923ae93939f047b6caffected · git
    • 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 and later · before d38939ebe0d992d581acb6885c1723fa83c1fb2caffected · git
    • 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 and later · before a7d6e0ac0a8861f6b1027488062251a8e28150fdaffected · git
    • 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 and later · before d1365ca80b012d8a7863e45949e413fb61fa4861affected · git
    • 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 and later · before fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76affected · git
    • 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 and later · before 2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8affected · git
    • before 3.5not affected · semver
    • 5.10.238 and later · up to and including 5.10.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.140-16.1.140-1
Debian:13linuxbefore 6.12.30-16.12.30-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-37980May 20, 2025 · block: fix resource leak in blk_register_queue() error path
    22Monitor
  • ← EarlierCVE-2025-37984May 20, 2025 · crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()
    22Monitor
  • Later →CVE-2025-37993May 29, 2025 · can: m_can: m_can_class_allocate_dev(): initialize spin lock on device probe
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8Vendor (CNA)
Linux Linuxa7d6e0ac0a8861f6b1027488062251a8e28150fdVendor (CNA)
Linux Linuxd1365ca80b012d8a7863e45949e413fb61fa4861Vendor (CNA)
Linux Linuxd3336f746f196c6a53e0480923ae93939f047b6cVendor (CNA)
Linux Linuxd38939ebe0d992d581acb6885c1723fa83c1fb2cVendor (CNA)
Linux Linuxea1132ccb112f51ba749c56a912f67970c2cd542Vendor (CNA)
Linux Linuxfe88c7e4fc2c1cd75a278a15ffbf1689efad4e76Vendor (CNA)
azl3 kernel 6.6.85.1-4 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.92.2-1 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.140-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records