CVE-2026-23105

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

Score 5.5 from GitHub Security Advisory published 2026-02-04. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2026-5436 (ENISA EUVD) · GHSA-jvw7-84v9-fr93 (GitHub Security Advisories)Source: ENISA EUVD

5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag

This is more of a preventive patch to make the code more consistent and to prevent possible exploits that employ child qlen manipulations on qfq. use cl_is_active instead of relying on the child qdisc's qlen to determine class activation.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (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
0.1%
EPSS %ILE
3rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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 (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (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.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). 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

February 4, 2026

Last Modified

October 19, 2026

Advisory Details (7)

Auto-updated Aug 5, 2026
Patch available.
Web page

net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33
Web page

net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6
Web page

net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0c
Web page

net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28a
Web page

net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d
Web page

net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835
Web page

net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254

Patch Availability(31)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-azure-edge (6.8.0-1059.65~22.04.1) @ jammy2026-10-19ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1056.62) @ noble2026-10-19ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1021.21~24.04.1) @ noble2026-10-19ubuntu
ubuntulinux-tools-azure-fde-6.17 (6.17.0-1018.18~24.04.1) @ noble2026-10-19ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1059.65+fips1) @ noble2026-10-19ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1054.57~22.04.1) @ jammy2026-10-19ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1106.115~20.04.1) @ focal2026-10-19ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-116.116+fips1) @ noble2026-10-19ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1057.57~20.04.1) @ focal2026-10-19ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.176.161) @ jammy2026-10-19ubuntu
ubuntulinux-tools-gcp-fips-5.15 (5.15.0.1105.95) @ jammy2026-10-19ubuntu
ubuntulinux-tools-realtime-5.15 (5.15.0.1104.108) @ jammy2026-10-19ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1057.57) @ jammy2026-10-19ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.176.186~20.04.1) @ focal2026-10-19ubuntu
ubuntulinux-tools-kvm-5.15 (5.15.0.1097.93) @ jammy2026-10-19ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1110.95) @ jammy2026-10-19ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1099.102~20.04.1) @ focal2026-10-19ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1110.119~20.04.1) @ focal2026-10-19ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1099.97) @ jammy2026-10-19ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1070 (5.15.0-1070.74) @ jammy2026-10-19ubuntu
ubuntulinux-virtual-6.8 (6.8.0-117.117) @ noble2026-10-19ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1024.24) @ noble2026-10-19ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1030.30) @ noble2026-10-19ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1031.31) @ noble2026-10-19ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1054.57.1) @ noble2026-10-19ubuntu
ubuntulinux-tools-oracle-64k-6.17 (6.17.0-1019.19~24.04.3+1) @ noble2026-10-19ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-10-19ubuntu
ubuntulinux-tools-realtime-hwe-24.04 (6.17.0-1018.20~24.04.1) @ noble2026-10-19ubuntu
redhatkernel-rt-0:4.18.0-553.171.1.rt7.512.el8_102026-10-05redhat
redhatkernel-0:4.18.0-553.171.1.el8_102026-10-05redhat
linuxKernel @ 5.10.249 (fixes >=3.8.0)—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 (48 versions)
  • every version up to 5.10.249-1: fixed in 5.10.249-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.159-1~deb11u1 (14 versions)
  • every version up to 6.1.162-1~deb11u1: fixed in 6.1.162-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (46 versions)
  • every version up to 6.1.162-1: fixed in 6.1.162-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.69-1~bpo12+1 (10 versions)
  • every version up to 6.12.69-1: fixed in 6.12.69-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.18~rc7-1~exp1 (97 versions)
  • every version up to 6.18.8-1: fixed in 6.18.8-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(23)

Data Freshness Timeline

(refreshed 8× in last 7d / 43× 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 99 of 235 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 136 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-10-28 12:25 UTCOSV refresh
  8. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-25 14:41 UTCEG score recompute
  12. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-10-19 19:38 UTCVendor advisory
  18. 2026-10-19 19:38 UTCGHSA enrichmentGHSA-jvw7-84v9-fr93 · GitHub CVSS 5.5
  19. 2026-10-19 18:31 UTCEG score recompute
  20. 2026-10-19 18:31 UTCVendor advisory
  21. 2026-10-19 18:31 UTCGHSA enrichmentGHSA-jvw7-84v9-fr93 · GitHub CVSS 5.5
  22. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-10-18 03:55 UTCEG score recompute
  25. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
Show 74 more
  1. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-12 16:21 UTCEG score recompute
  7. 2026-10-11 20:03 UTCEG score recompute
  8. 2026-10-11 17:16 UTCEG score recompute
  9. 2026-10-11 14:48 UTCEG score recompute
  10. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-08 17:04 UTCOSV refresh
  15. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-09-29 15:21 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  27. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  28. 2026-09-18 23:23 UTCOSV refresh
  29. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  32. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  33. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  34. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  35. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  36. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  37. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  38. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  39. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  40. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-08-31 03:02 UTCOSV refresh
  42. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  43. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  44. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  45. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  46. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  47. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  48. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  49. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  50. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  51. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  52. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  53. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  54. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  55. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  56. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  57. 2026-08-14 11:13 UTCEG score recompute
  58. 2026-08-14 11:13 UTCVendor advisory
  59. 2026-08-14 11:13 UTCGHSA enrichmentGHSA-jvw7-84v9-fr93 · GitHub CVSS 5.5
  60. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  61. 2026-08-13 03:32 UTCEG score recompute
  62. 2026-08-13 03:32 UTCVendor advisory
  63. 2026-08-13 03:32 UTCGHSA enrichmentGHSA-jvw7-84v9-fr93 · GitHub CVSS 5.5
  64. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  65. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  66. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  67. 2026-08-09 15:52 UTCEG score recompute
  68. 2026-08-09 15:52 UTCVendor advisory
  69. 2026-08-09 15:52 UTCGHSA enrichmentGHSA-jvw7-84v9-fr93 · GitHub CVSS 5.5
  70. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  71. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  72. 2026-08-07 22:47 UTCEG score recompute
  73. 2026-08-07 22:47 UTCVendor advisory
  74. 2026-08-07 22:47 UTCGHSA enrichmentGHSA-jvw7-84v9-fr93 · GitHub CVSS 5.5

Frequently asked(5)

What is CVE-2026-23105?
CVE-2026-23105 is a medium-severity vulnerability; its CVE record was published on February 4, 2026. In the Linux kernel, the following vulnerability has been resolved: net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag This is more of a preventive patch to make the code more consistent and to prevent possible exploits that employ child qlen manipulations on…
When was the CVE record for CVE-2026-23105 published?
The CVE record for CVE-2026-23105 was published on February 4, 2026. 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 October 19, 2026; the record at its source may have been updated since.
Is CVE-2026-23105 actively exploited?
CVE-2026-23105 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-23105?
CVE-2026-23105 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-23105?
A fix for CVE-2026-23105 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-23105 are linked in the Vendor Advisories panel on this page.

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