CVE-2025-38477

MEDIUMNVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

Score 4.7 from GitHub Security Advisory published 2025-07-28. NVD baseline CVSS 4.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.7Exploit: None knownExposed: 0

A fix is available — apply it.

In 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:

  • Moved qfq_destroy_class into the critical section.
  • Added sch_tree_lock protection to qfq_dump_class and
qfq_dump_class_stats.

CVSS v3
4.7
EG Score
4.7(medium)
EG Risk
21(Track)
EG Risk 21/100SSVC: 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
Severity47% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

July 28, 2025

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

net/sched: sch_qfq: Fix race condition on qfq_aggregate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5e28d5a3f774f118896aec17a3a20a9c5c9dfc64
generic

net/sched: sch_qfq: Fix race condition on qfq_aggregate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c000a3a330d97f6c073ace5aa5faf94b9adb4b79
generic

net/sched: sch_qfq: Fix race condition on qfq_aggregate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a6d735100f602c830c16d69fb6d780eebd8c9ae1
generic

net/sched: sch_qfq: Fix race condition on qfq_aggregate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fbe48f06e64134dfeafa89ad23387f66ebca3527
generic

net/sched: sch_qfq: Fix race condition on qfq_aggregate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/466e10194ab81caa2ee6a332d33ba16bcceeeba6
generic

net/sched: sch_qfq: Fix race condition on qfq_aggregate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c6df794000147a3a02f79984aada4ce83f8d0a1e
generic

net/sched: sch_qfq: Fix race condition on qfq_aggregate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d841aa5518508ab195b6781ad0d73ee378d713dd
generic

net/sched: sch_qfq: Fix race condition on qfq_aggregate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aa7a22c4d678bf649fd3a1d27debec583563414d

Vendor Advisories for CVE-2025-38477(6)

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-gke-5.15 (5.15.0.1090.89) @ jammy2026-07-30ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1097.95) @ jammy2026-07-30ubuntu
ubuntulinux-tools-nvidia-tegra-igx-rt-5.15 (5.15.0.1035.37) @ jammy2026-07-30ubuntu
ubuntulinux-tools-aws-fips-5.4 (5.4.0.1151.98) @ focal2026-07-30ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.14.0-1013.13~24.04.1) @ noble2026-07-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-85.85~22.04.1) @ jammy2026-07-30ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2031.32) @ noble2026-07-30ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1035.36) @ noble2026-07-30ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1040.44) @ noble2026-07-30ubuntu
ubuntulinux-tools-azure-6.14 (6.14.0-1013.13) @ plucky2026-07-30ubuntu
ubuntulinux-tools-realtime-5.15 (5.15.0.1093.97) @ jammy2026-07-30ubuntu
ubuntulinux-tools-oracle-lts-20.04 (5.4.0.1149.143) @ focal2026-07-30ubuntu
ubuntulinux-tools-azure-fips-4.15 (4.15.0.2102.98) @ bionic2026-07-30ubuntu
ubuntulinux-tools-kvm (4.15.0.1168.159) @ bionic2026-07-30ubuntu
ubuntulinux-tools-raspi-6.14 (6.14.0-1015.15) @ plucky2026-07-30ubuntu
ubuntulinux-tools-azure-fips-5.4 (5.4.0.1155.92) @ focal2026-07-30ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1040.46~22.04.1) @ jammy2026-07-30ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1097.106~20.04.1) @ focal2026-07-30ubuntu
ubuntulinux-tools-oracle-64k-6.14 (6.14.0-1014.14) @ plucky2026-07-30ubuntu
ubuntulinux-tools-oracle-edge (5.4.0.1149.159~18.04.1) @ bionic2026-07-30ubuntu
ubuntulinux-tools-kvm-5.15 (5.15.0.1089.85) @ jammy2026-07-30ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1134.147~18.04.1) @ bionic2026-07-30ubuntu
ubuntulinux-tools-oracle (4.15.0.1148.159~16.04.1) @ xenial2026-07-30ubuntu
redhatkernel-0:4.18.0-305.179.1.el8_42025-12-04redhat
redhatkernel-0:4.18.0-193.173.1.el8_22025-11-18redhat
redhatkernel-0:3.10.0-1160.141.1.el72025-10-01redhat
redhatkernel-0:4.18.0-372.162.1.el8_62025-10-01redhat
redhatkernel-0:4.18.0-477.112.1.el8_82025-09-30redhat
redhatkernel-rt-0:3.10.0-1160.140.1.rt56.1292.el72025-09-30redhat
redhatkernel-0:4.18.0-553.72.1.el8_102025-09-02redhat
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 ... 6.1.148-1~deb11u1 (11 versions)6.1.153-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (41 versions)6.1.147-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-16.12.41-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.16~rc7-1~exp1 (59 versions)6.16.3-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(19)

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 / 25× 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 165 total refreshes for this CVE.

  1. 2026-09-07 16:00 UTCEPSS rescore
  2. 2026-09-07 11:18 UTCOSV refresh
  3. 2026-09-06 13:46 UTCEPSS rescore
  4. 2026-09-04 05:05 UTCEPSS rescore
  5. 2026-09-02 14:11 UTCEPSS rescore
  6. 2026-09-01 13:53 UTCEPSS rescore
  7. 2026-09-01 04:38 UTCEPSS rescore
  8. 2026-08-30 19:16 UTCEPSS rescore
  9. 2026-08-28 21:40 UTCEPSS rescore
  10. 2026-08-27 14:24 UTCEPSS rescore
  11. 2026-08-26 14:45 UTCEPSS rescore
  12. 2026-08-25 13:48 UTCEPSS rescore
  13. 2026-08-23 00:18 UTCEPSS rescore
  14. 2026-08-21 23:48 UTCEPSS rescore
  15. 2026-08-20 22:54 UTCEPSS rescore
  16. 2026-08-20 20:31 UTCOSV refresh
  17. 2026-08-19 17:03 UTCEPSS rescore
  18. 2026-08-19 17:03 UTCEPSS rescore
  19. 2026-08-18 13:47 UTCEPSS rescore
  20. 2026-08-17 13:46 UTCEPSS rescore
  21. 2026-08-16 14:55 UTCEPSS rescore
  22. 2026-08-16 02:13 UTCEPSS rescore
  23. 2026-08-15 01:29 UTCEPSS rescore
  24. 2026-08-13 21:59 UTCEPSS rescore
  25. 2026-08-12 13:50 UTCEPSS rescore
Show 75 more
  1. 2026-08-09 13:46 UTCEPSS rescore
  2. 2026-08-08 16:36 UTCEPSS rescore
  3. 2026-08-07 16:26 UTCEPSS rescore
  4. 2026-08-06 13:46 UTCEPSS rescore
  5. 2026-08-05 13:02 UTCEG score recompute
  6. 2026-08-05 13:02 UTCVendor advisory
  7. 2026-08-05 13:02 UTCGHSA enrichment
  8. 2026-08-04 15:09 UTCEPSS rescore
  9. 2026-08-04 10:37 UTCEPSS rescore
  10. 2026-08-03 10:35 UTCEPSS rescore
  11. 2026-08-02 02:26 UTCEPSS rescore
  12. 2026-08-01 04:15 UTCEPSS rescore
  13. 2026-07-30 16:27 UTCEPSS rescore
  14. 2026-07-30 07:05 UTCEG score recompute
  15. 2026-07-30 07:05 UTCVendor advisory
  16. 2026-07-30 07:05 UTCGHSA enrichment
  17. 2026-07-30 06:24 UTCNVD updateCVSS v3 → 4.7 · severity → MEDIUM
  18. 2026-07-30 01:29 UTCEPSS rescore
  19. 2026-07-28 15:35 UTCEPSS rescore
  20. 2026-07-27 15:57 UTCOSV refresh
  21. 2026-07-26 14:54 UTCEPSS rescore
  22. 2026-07-25 14:17 UTCEPSS rescore
  23. 2026-07-25 14:17 UTCEPSS rescore
  24. 2026-07-24 14:17 UTCEPSS rescore
  25. 2026-07-23 02:54 UTCEG score recompute
  26. 2026-07-22 14:07 UTCEPSS rescore
  27. 2026-07-22 14:07 UTCEPSS rescore
  28. 2026-07-20 17:07 UTCEPSS rescore
  29. 2026-07-19 14:30 UTCEPSS rescore
  30. 2026-07-19 14:30 UTCEPSS rescore
  31. 2026-07-18 10:04 UTCEPSS rescore
  32. 2026-07-18 10:04 UTCEPSS rescore
  33. 2026-07-16 17:02 UTCEPSS rescore
  34. 2026-07-15 16:57 UTCEPSS rescore
  35. 2026-07-15 16:57 UTCEPSS rescore
  36. 2026-07-15 01:59 UTCEPSS rescore
  37. 2026-07-15 01:59 UTCEPSS rescore
  38. 2026-07-13 22:29 UTCEPSS rescore
  39. 2026-07-13 22:29 UTCEPSS rescore
  40. 2026-07-13 06:12 UTCEPSS rescore
  41. 2026-07-12 05:46 UTCEPSS rescore
  42. 2026-07-11 08:27 UTCEPSS rescore
  43. 2026-07-11 08:27 UTCEPSS rescore
  44. 2026-07-10 08:52 UTCOSV refresh
  45. 2026-07-09 19:09 UTCEPSS rescore
  46. 2026-07-09 19:09 UTCEPSS rescore
  47. 2026-07-07 13:45 UTCEPSS rescore
  48. 2026-07-06 16:27 UTCEPSS rescore
  49. 2026-07-06 16:27 UTCEPSS rescore
  50. 2026-07-06 02:23 UTCEPSS rescore
  51. 2026-07-04 06:30 UTCEPSS rescore
  52. 2026-07-01 15:06 UTCEPSS rescore
  53. 2026-07-01 15:06 UTCEPSS rescore
  54. 2026-06-30 23:22 UTCEPSS rescore
  55. 2026-06-30 23:22 UTCEPSS rescore
  56. 2026-06-28 14:07 UTCEPSS rescore
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  58. 2026-06-28 04:55 UTCEPSS rescore
  59. 2026-06-28 04:55 UTCEPSS rescore
  60. 2026-06-27 03:08 UTCEPSS rescore
  61. 2026-06-27 03:08 UTCEPSS rescore
  62. 2026-06-25 13:49 UTCEPSS rescore
  63. 2026-06-25 13:49 UTCEPSS rescore
  64. 2026-06-24 14:04 UTCEPSS rescore
  65. 2026-06-24 14:04 UTCEPSS rescore
  66. 2026-06-23 21:32 UTCEPSS rescore
  67. 2026-06-23 21:32 UTCEPSS rescore
  68. 2026-06-21 19:13 UTCOSV refresh
  69. 2026-06-21 14:56 UTCEPSS rescore
  70. 2026-06-21 14:56 UTCEPSS rescore
  71. 2026-06-21 01:59 UTCEPSS rescore
  72. 2026-06-21 01:59 UTCEPSS rescore
  73. 2026-06-19 19:25 UTCEPSS rescore
  74. 2026-06-19 19:25 UTCEPSS rescore
  75. 2026-06-18 17:52 UTCEPSS rescore

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-38477?
CVE-2025-38477 is a medium vulnerability published on July 28, 2025. In the Linux kernel, the following vulnerability has been resolved: net/sched: schqfq: Fix race condition on qfqaggregate A race condition can occur when 'agg' is modified in qfqchangeagg (called during qfq_enqueue) while other threads access it concurrently. For example, qfqdumpclass may trigger a…
When was CVE-2025-38477 disclosed?
CVE-2025-38477 was first published in the National Vulnerability Database on July 28, 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-2025-38477 actively exploited?
CVE-2025-38477 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 98.0% of all scored CVEs.
What is the CVSS score of CVE-2025-38477?
CVE-2025-38477 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2025-38477?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-38477, 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-2025-38477

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