CVE-2025-37798

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-05-02. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog()

After making all ->qlen_notify() callbacks idempotent, now it is safe to remove the check of qlen!=0 from both fq_codel_dequeue() and codel_qdisc_dequeue().

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
12th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 2, 2025

Last Modified

August 5, 2026

Advisory Details (10)

Auto-updated Jul 30, 2026
Patch available.
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4193-1] linux-6.1 security update

https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Web page

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eda741fe155ddf5ecd2dd3bfbd4fc3c0c7dbb450
Web page

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e73c838c80dccb9e4f19becc11d9f3cb4a27d483
Web page

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cc71a757da78dd4aa1b4a9b19cb011833730ccf2
Web page

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31
Web page

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/829c49b6b2ff45b043739168fd1245e4e1a91a30
Web page

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7a742a9506849d1c1aa71e36c89855ceddc7d58e
Web page

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4d55144b12e742404bb3f8fee6038bafbf45619d
Web page

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/342debc12183b51773b3345ba267e9263bdfaaef
Web page

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2f9761a94bae33d26e6a81b31b36e7d776d93dc1

Vendor Advisories for CVE-2025-37798(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(31)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-azure (6.14.0-1007.7) @ plucky2026-07-30ubuntu
ubuntulinux-tools-fips (4.4.0.1115.116) @ xenial2026-07-30ubuntu
ubuntulinux-tools-ibm-lts-24.04 (6.8.0-1028.28) @ noble2026-07-30ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1024.25) @ noble2026-07-30ubuntu
ubuntulinux-tools-gcp-fips-5.15 (5.15.0.1086.76) @ jammy2026-07-30ubuntu
ubuntulinux-tools-oracle-64k (6.14.0-1007.7) @ plucky2026-07-30ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1080.84) @ jammy2026-07-30ubuntu
ubuntulinux-tools-lowlatency-64k-6.11 (6.11.0-1016.17) @ oracular2026-07-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1040.40) @ jammy2026-07-30ubuntu
ubuntulinux-tools-gcp-fips-4.15 (4.15.0.2083.81) @ bionic2026-07-30ubuntu
ubuntulinux-tools-kvm (4.4.0.1146.143) @ xenial2026-07-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-29.29) @ oracular2026-07-30ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1031.36) @ noble2026-07-30ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1051.55) @ jammy2026-07-30ubuntu
ubuntulinux-tools-lowlatency-hwe-24.04 (6.11.0-1016.17~24.04.1) @ noble2026-07-30ubuntu
ubuntulinux-tools-azure-nvidia-6.8 (6.8.0-1019.20) @ noble2026-07-30ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1083.89~20.04.1) @ focal2026-07-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-64.67~22.04.1) @ jammy2026-07-30ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1131.162) @ focal2026-07-30ubuntu
ubuntulinux-tools-iot-5.4 (5.4.0.1052.50) @ focal2026-07-30ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1083.81) @ jammy2026-07-30ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1094.79) @ jammy2026-07-30ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1094.103~20.04.1) @ focal2026-07-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.14.0-22.22) @ plucky2026-07-30ubuntu
ubuntulinux-virtual-lts-xenial (4.4.0.270.276) @ xenial2026-07-30ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.143.138) @ jammy2026-07-30ubuntu
ubuntulinux-tools-realtime (5.15.0.1087.91) @ jammy2026-07-30ubuntu
ubuntulinux-virtual-6.8 (6.8.0-63.66) @ noble2026-07-30ubuntu
ubuntulinux-tools-azure-edge (6.11.0-1018.18~24.04.1) @ noble2026-07-30ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.239.251~16.04.1) @ xenial2026-07-30ubuntu
linuxKernel @ 5.4.297 (fixes >=3.5.0)—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (46 versions)
  • every version up to 5.10.244-1: fixed in 5.10.244-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.129-1~deb11u1 (7 versions)
  • every version up to 6.1.137-1~deb11u1: fixed in 6.1.137-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (37 versions)
  • every version up to 6.1.135-1: fixed in 6.1.135-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.12.25-1: fixed in 6.12.25-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.12.25-1: fixed in 6.12.25-1
—

Additional Vendor Advisories

(24)

Data Freshness Timeline

(refreshed 11× in last 7d / 28× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 91 of 162 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 9 repeat rows among the latest 100 are merged into the row they repeat. The 71 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-12 17:08 UTCEG score recompute
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-10-11 20:41 UTCEG score recompute
  4. 2026-10-11 18:51 UTCEG score recompute
  5. 2026-10-11 15:28 UTCEG score recompute
  6. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-10-08 17:09 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  13. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  14. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  16. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  18. 2026-09-27 03:45 UTCOSV refresh
  19. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-09-26 00:24 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  21. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  22. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  24. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-09-17 19:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
Show 66 more
  1. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  2. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  4. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  5. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  6. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-09-07 12:48 UTCOSV refresh
  11. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-08-20 22:01 UTCOSV refresh
  26. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  27. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  28. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  29. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  30. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  31. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  32. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  33. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  34. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  35. 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  36. 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  37. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  38. 2026-08-05 13:57 UTCEG score recompute
  39. 2026-08-05 13:57 UTCVendor advisory
  40. 2026-08-05 13:57 UTCGHSA enrichmentGHSA-qfpx-fgcv-pjx6 · GitHub severity HIGH · GitHub CVSS 7.8
  41. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  42. 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  43. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  44. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  45. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  46. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  47. 2026-07-30 07:12 UTCEG score recompute
  48. 2026-07-30 07:12 UTCVendor advisory
  49. 2026-07-30 07:11 UTCGHSA enrichmentGHSA-qfpx-fgcv-pjx6 · GitHub severity HIGH · GitHub CVSS 7.8
  50. 2026-07-30 01:29 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  51. 2026-07-28 15:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  52. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  53. 2026-07-25 14:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  54. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  55. 2026-07-24 07:11 UTCOSV refresh
  56. 2026-07-23 02:54 UTCEG score recompute
  57. 2026-07-22 14:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  58. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  59. 2026-07-20 17:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  60. 2026-07-19 14:30 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  61. 2026-07-19 02:28 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  62. 2026-07-18 10:04 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  63. 2026-07-16 17:02 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  64. 2026-07-15 16:57 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  65. 2026-07-15 01:59 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  66. 2026-07-13 06:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile

Frequently asked(5)

What is CVE-2025-37798?
CVE-2025-37798 is a high-severity vulnerability; its CVE record was published on May 2, 2025. In the Linux kernel, the following vulnerability has been resolved: codel: remove sch->q.qlen check before qdisctreereduce_backlog() After making all ->qlen_notify() callbacks idempotent, now it is safe to remove the check of qlen!=0 from both fqcodeldequeue() and codelqdiscdequeue().
When was the CVE record for CVE-2025-37798 published?
The CVE record for CVE-2025-37798 was published on May 2, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 5, 2026; the record at its source may have been updated since.
Is CVE-2025-37798 actively exploited?
CVE-2025-37798 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-37798?
CVE-2025-37798 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2025-37798?
A fix for CVE-2025-37798 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-37798 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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