CVE-2025-37798

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

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, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

May 2, 2025

Last Modified

August 5, 2026

Advisory Details (10)

Auto-updated Jul 30, 2026
Patch available.
generic Patch Available

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

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

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
generic

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
generic

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
generic

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
generic

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
generic

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
generic

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
generic

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
generic

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 / EcosystemFixed in / 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—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 rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (46 versions)5.10.244-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.129-1~deb11u1 (7 versions)6.1.137-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (37 versions)6.1.135-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—6.12.25-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—6.12.25-1—

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 114 total refreshes for this CVE.

  1. 2026-08-15 01:29 UTCEPSS rescore
  2. 2026-08-13 21:59 UTCEPSS rescore
  3. 2026-08-12 13:50 UTCEPSS rescore
  4. 2026-08-09 13:46 UTCEPSS rescore
  5. 2026-08-08 16:36 UTCEPSS rescore
  6. 2026-08-07 16:26 UTCEPSS rescore
  7. 2026-08-06 13:46 UTCEPSS rescore
  8. 2026-08-05 13:57 UTCEG score recompute
  9. 2026-08-05 13:57 UTCVendor advisory
  10. 2026-08-05 13:57 UTCGHSA enrichment
  11. 2026-08-04 15:09 UTCEPSS rescore
  12. 2026-08-04 10:37 UTCEPSS rescore
  13. 2026-08-03 10:35 UTCEPSS rescore
  14. 2026-08-02 02:26 UTCEPSS rescore
  15. 2026-08-01 04:15 UTCEPSS rescore
  16. 2026-07-30 16:27 UTCEPSS rescore
  17. 2026-07-30 07:12 UTCEG score recompute
  18. 2026-07-30 07:12 UTCVendor advisory
  19. 2026-07-30 07:11 UTCGHSA enrichment
  20. 2026-07-30 01:29 UTCEPSS rescore
  21. 2026-07-28 15:35 UTCEPSS rescore
  22. 2026-07-26 14:54 UTCEPSS rescore
  23. 2026-07-25 14:17 UTCEPSS rescore
  24. 2026-07-25 14:17 UTCEPSS rescore
  25. 2026-07-24 14:17 UTCEPSS rescore
Show 75 more
  1. 2026-07-24 07:11 UTCOSV refresh
  2. 2026-07-23 02:54 UTCEG score recompute
  3. 2026-07-22 14:07 UTCEPSS rescore
  4. 2026-07-22 14:07 UTCEPSS rescore
  5. 2026-07-21 15:24 UTCEPSS rescore
  6. 2026-07-20 17:07 UTCEPSS rescore
  7. 2026-07-19 14:30 UTCEPSS rescore
  8. 2026-07-19 14:30 UTCEPSS rescore
  9. 2026-07-19 02:28 UTCEPSS rescore
  10. 2026-07-19 02:28 UTCEPSS rescore
  11. 2026-07-18 10:04 UTCEPSS rescore
  12. 2026-07-18 10:04 UTCEPSS rescore
  13. 2026-07-16 17:02 UTCEPSS rescore
  14. 2026-07-15 16:57 UTCEPSS rescore
  15. 2026-07-15 16:57 UTCEPSS rescore
  16. 2026-07-15 01:59 UTCEPSS rescore
  17. 2026-07-15 01:59 UTCEPSS rescore
  18. 2026-07-13 06:12 UTCEPSS rescore
  19. 2026-07-12 05:46 UTCEPSS rescore
  20. 2026-07-11 08:27 UTCEPSS rescore
  21. 2026-07-11 08:27 UTCEPSS rescore
  22. 2026-07-09 19:09 UTCEPSS rescore
  23. 2026-07-09 19:09 UTCEPSS rescore
  24. 2026-07-07 13:45 UTCEPSS rescore
  25. 2026-07-07 02:51 UTCOSV refresh
  26. 2026-07-06 16:27 UTCEPSS rescore
  27. 2026-07-06 16:27 UTCEPSS rescore
  28. 2026-07-05 02:30 UTCEPSS rescore
  29. 2026-07-04 06:30 UTCEPSS rescore
  30. 2026-07-01 15:06 UTCEPSS rescore
  31. 2026-07-01 15:06 UTCEPSS rescore
  32. 2026-06-30 23:22 UTCEPSS rescore
  33. 2026-06-30 23:22 UTCEPSS rescore
  34. 2026-06-29 14:06 UTCEPSS rescore
  35. 2026-06-29 14:06 UTCEPSS rescore
  36. 2026-06-28 14:07 UTCEPSS rescore
  37. 2026-06-28 14:07 UTCEPSS rescore
  38. 2026-06-28 04:55 UTCEPSS rescore
  39. 2026-06-28 04:55 UTCEPSS rescore
  40. 2026-06-27 03:08 UTCEPSS rescore
  41. 2026-06-27 03:08 UTCEPSS rescore
  42. 2026-06-25 13:49 UTCEPSS rescore
  43. 2026-06-25 13:49 UTCEPSS rescore
  44. 2026-06-24 14:04 UTCEPSS rescore
  45. 2026-06-24 14:04 UTCEPSS rescore
  46. 2026-06-23 21:32 UTCEPSS rescore
  47. 2026-06-23 21:32 UTCEPSS rescore
  48. 2026-06-22 14:25 UTCEPSS rescore
  49. 2026-06-22 14:25 UTCEPSS rescore
  50. 2026-06-21 14:56 UTCEPSS rescore
  51. 2026-06-21 14:56 UTCEPSS rescore
  52. 2026-06-21 01:59 UTCEPSS rescore
  53. 2026-06-21 01:59 UTCEPSS rescore
  54. 2026-06-19 19:25 UTCEPSS rescore
  55. 2026-06-19 19:25 UTCEPSS rescore
  56. 2026-06-18 17:52 UTCEPSS rescore
  57. 2026-06-18 17:52 UTCEPSS rescore
  58. 2026-06-18 14:05 UTCOSV refresh
  59. 2026-06-17 17:52 UTCEPSS rescore
  60. 2026-06-16 17:52 UTCEPSS rescore
  61. 2026-06-16 17:52 UTCEPSS rescore
  62. 2026-06-14 23:17 UTCEPSS rescore
  63. 2026-06-13 23:00 UTCEPSS rescore
  64. 2026-06-12 23:11 UTCEPSS rescore
  65. 2026-06-11 14:00 UTCEPSS rescore
  66. 2026-06-10 22:18 UTCEPSS rescore
  67. 2026-06-10 13:22 UTCEPSS rescore
  68. 2026-06-08 14:16 UTCEPSS rescore
  69. 2026-06-08 14:16 UTCEPSS rescore
  70. 2026-06-07 15:24 UTCEPSS rescore
  71. 2026-06-06 13:47 UTCEPSS rescore
  72. 2026-06-06 13:47 UTCEPSS rescore
  73. 2026-06-05 22:46 UTCEPSS rescore
  74. 2026-06-05 22:46 UTCEPSS rescore
  75. 2026-06-05 06:10 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-37798?
CVE-2025-37798 is a high vulnerability 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 CVE-2025-37798 disclosed?
CVE-2025-37798 was first published in the National Vulnerability Database on May 2, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-37798 actively exploited?
CVE-2025-37798 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.0% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-37798, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-37798

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