CVE-2025-38193

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2025-07-04. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

net_sched: sch_sfq: reject invalid perturb period

Gerrard Tai reported that SFQ perturb_period has no range check yet, and this can be used to trigger a race condition fixed in a separate patch.

We want to make sure ctl->perturb_period * HZ will not overflow and is positive.

tc qd add dev lo root sfq perturb -10 # negative value : error Error: sch_sfq: invalid perturb period.

tc qd add dev lo root sfq perturb 1000000000 # too big : error Error: sch_sfq: invalid perturb period.

tc qd add dev lo root sfq perturb 2000000 # acceptable value tc -s -d qd sh dev lo qdisc sfq 8005: root refcnt 2 limit 127p quantum 64Kb depth 127 flows 128 divisor 1024 perturb 2000000sec Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

July 4, 2025

Last Modified

August 5, 2026

Advisory Details (10)

Auto-updated Aug 2, 2026
Patch available.
generic Patch Available

[SECURITY] [DLA 4328-1] linux-6.1 security update

https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
generic Patch Available

[SECURITY] [DLA 4327-1] linux security update

https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
generic

net_sched: sch_sfq: reject invalid perturb period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f9b97d466e6026ccbdda30bb5b71965b67ccbc82
generic

net_sched: sch_sfq: reject invalid perturb period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e0936ff56be4e08ad5b60ec26971eae0c40af305
generic

net_sched: sch_sfq: reject invalid perturb period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b11a50544af691b787384089b68f740ae20a441b
generic

net_sched: sch_sfq: reject invalid perturb period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/956b5aebb349449b38d920d444ca1392d43719d1
generic

net_sched: sch_sfq: reject invalid perturb period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7ca52541c05c832d32b112274f81a985101f9ba8
generic

net_sched: sch_sfq: reject invalid perturb period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/590b2d7d0beadba2aa576708a05a05f0aae39295
generic

net_sched: sch_sfq: reject invalid perturb period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2254d038dab9c194fe6a4b1ce31034f42e91a6e5
generic

net_sched: sch_sfq: reject invalid perturb period - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0357da9149eac621f39e235a135ebf155f01f7c3

Patch Availability(18)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.14.0-34.34~24.04.1) @ noble2026-05-30ubuntu
ubuntulinux-virtual-6.8 (6.8.0-100.100) @ noble2026-05-30ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1041.42~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gcp-edge (6.8.0-1047.50~22.04.2) @ jammy2026-05-30ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1041.42) @ noble2026-05-30ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-100.100+fips1) @ noble2026-05-30ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1043.44) @ noble2026-05-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-100.100~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1047.50+fips1) @ noble2026-05-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1046.49.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-ibm-lts-24.04 (6.8.0-1044.44) @ noble2026-05-30ubuntu
ubuntulinux-tools-gke-64k-6.8 (6.8.0-1043.48) @ noble2026-05-30ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-100.100.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1046.52+fips1) @ noble2026-05-30ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1023.24) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1046.52) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1051.57~22.04.1) @ jammy2026-05-30ubuntu
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 ... 6.1.148-1~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
linux—6.12.35-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—6.12.35-1—

Weakness Classification(1)

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

All Vendor Advisories

(18)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 24× 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 143 total refreshes for this CVE.

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

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

Frequently asked(5)

What is CVE-2025-38193?
CVE-2025-38193 is a medium vulnerability published on July 4, 2025. In the Linux kernel, the following vulnerability has been resolved: netsched: schsfq: reject invalid perturb period Gerrard Tai reported that SFQ perturb_period has no range check yet, and this can be used to trigger a race condition fixed in a separate patch. We want to make sure…
When was CVE-2025-38193 disclosed?
CVE-2025-38193 was first published in the National Vulnerability Database on July 4, 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-2025-38193 actively exploited?
CVE-2025-38193 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 92.3% of all scored CVEs.
What is the CVSS score of CVE-2025-38193?
CVE-2025-38193 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2025-38193?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-38193, 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-2025-38193

Explore →

Is Your Infrastructure Affected by CVE-2025-38193?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs