CVE-2026-31417

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-13. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-21938 (ENISA EUVD) · GHSA-j4r7-4685-8m4m (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
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: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

net/x25: Fix overflow when accumulating packets

Add a check to ensure that x25_sock.fraglen does not overflow.

The fraglen also needs to be resetted when purging fragment_queue in x25_clear_queues().

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100

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)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 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
0.4%
EPSS %ILE
38th
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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). 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: 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 (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

April 13, 2026

Last Modified

October 15, 2026

Advisory Details (8)

Auto-updated Jun 11, 2026
Patch available.
Web page

net/x25: Fix overflow when accumulating packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f953f11ccf4afe6feb635c08145f4240d9a6b544
Web page

net/x25: Fix overflow when accumulating packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a1822cb524e89b4cd2cf0b82e484a2335496a6d9
Web page

net/x25: Fix overflow when accumulating packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/96fc16370b0bceb289c7e0479bd0540b81e257aa
Web page

net/x25: Fix overflow when accumulating packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8c92969c197b91c134be27dc3afb64ab468853a9
Web page

net/x25: Fix overflow when accumulating packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/798d613afb64b01a203f448fb0f43c37c6afe79d
Web page

net/x25: Fix overflow when accumulating packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6e568835ea54a3e1d08e310e34f95d434e739477
Web page

net/x25: Fix overflow when accumulating packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4e2d1bcef78d21247fe8fef13bc7ed95885df2b5
Web page

net/x25: Fix overflow when accumulating packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1734bd85c5e0a7a801295b729efb56b009cb8fc3

Vendor Advisories for CVE-2026-31417(2)

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

Patch Availability(28)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-10-28ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-10-28ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-10-28ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-10-28ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-10-28ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-10-28ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-10-28ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1107.113~20.04.1) @ focal2026-10-28ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-10-28ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-10-28ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-10-28ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-10-28ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-10-28ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-10-28ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-10-28ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-10-28ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1106.104) @ jammy2026-10-28ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-10-28ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.186.196~20.04.1) @ focal2026-10-28ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1059.62~22.04.1) @ jammy2026-10-28ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-10-28ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-10-28ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-10-28ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-10-28ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-10-28ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-10-28ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-10-28ubuntu
linuxKernel @ 5.10.253 (fixes >=2.6.12)—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 (53 versions)
  • every version up to 5.10.257-1: fixed in 5.10.257-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.164-1~deb11u1 (16 versions)
  • every version up to 6.1.170-1~deb11u1: fixed in 6.1.170-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (48 versions)
  • every version up to 6.1.170-1: fixed in 6.1.170-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)
  • every version up to 6.12.85-1: fixed in 6.12.85-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (126 versions)
  • every version up to 6.19.12-1: fixed in 6.19.12-1
—

Weakness Classification(1)

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

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 11× in last 7d / 45× 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 95 of 286 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. 5 repeat rows among the latest 100 are merged into the row they repeat. The 191 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  2. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  3. 2026-10-28 15:28 UTCEG score recompute
  4. 2026-10-28 15:28 UTCVendor advisory
  5. 2026-10-28 15:28 UTCGHSA enrichmentGHSA-j4r7-4685-8m4m · GitHub severity HIGH · GitHub CVSS 7.5
  6. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  7. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  8. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  9. 2026-10-25 14:36 UTCEG score recompute
  10. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.8% · 57th percentile
  11. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.8% · 57th percentile
  12. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.8% · 57th percentile
  13. 2026-10-21 16:46 UTCEG score recompute
  14. 2026-10-21 16:46 UTCVendor advisory
  15. 2026-10-21 16:45 UTCGHSA enrichmentGHSA-j4r7-4685-8m4m · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.8% · 57th percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  18. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  19. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  20. 2026-10-18 03:48 UTCEG score recompute
  21. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  22. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  23. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  24. 2026-10-15 02:37 UTCEG score recompute
  25. 2026-10-15 02:36 UTCGHSA enrichmentGHSA-j4r7-4685-8m4m · GitHub severity HIGH · GitHub CVSS 7.5
Show 70 more
  1. 2026-10-15 01:39 UTCEG score recompute
  2. 2026-10-15 01:39 UTCVendor advisory
  3. 2026-10-15 01:39 UTCGHSA enrichmentGHSA-j4r7-4685-8m4m · GitHub severity HIGH · GitHub CVSS 7.5
  4. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  5. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  7. 2026-10-12 16:15 UTCEG score recompute
  8. 2026-10-11 19:57 UTCEG score recompute
  9. 2026-10-11 17:11 UTCEG score recompute
  10. 2026-10-11 14:39 UTCEG score recompute
  11. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  12. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  14. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  15. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  16. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  17. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  19. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  20. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  21. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  23. 2026-09-28 00:49 UTCOSV refresh
  24. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  25. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  26. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  27. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  28. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  29. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  30. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  31. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  32. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  33. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  34. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  35. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  36. 2026-09-08 09:12 UTCEG score recompute
  37. 2026-09-08 09:12 UTCVendor advisory
  38. 2026-09-08 09:11 UTCGHSA enrichmentGHSA-j4r7-4685-8m4m · GitHub severity HIGH · GitHub CVSS 7.5
  39. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  40. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  41. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  42. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  43. 2026-09-02 05:28 UTCOSV refresh
  44. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  45. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  46. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  47. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  48. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  49. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  50. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  51. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  52. 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  53. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  54. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  55. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  56. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  57. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  58. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  59. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  60. 2026-08-16 06:55 UTCEG score recompute
  61. 2026-08-16 06:55 UTCVendor advisory
  62. 2026-08-16 06:55 UTCGHSA enrichmentGHSA-j4r7-4685-8m4m · GitHub severity HIGH · GitHub CVSS 7.5
  63. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  64. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  65. 2026-08-14 18:17 UTCVendor advisory
  66. 2026-08-14 18:17 UTCGHSA enrichmentGHSA-j4r7-4685-8m4m · GitHub severity HIGH · GitHub CVSS 7.5
  67. 2026-08-14 04:56 UTCEG score recompute
  68. 2026-08-14 04:56 UTCVendor advisory
  69. 2026-08-14 04:56 UTCGHSA enrichmentGHSA-j4r7-4685-8m4m · GitHub severity HIGH · GitHub CVSS 7.5
  70. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 37th percentile

Frequently asked(5)

What is CVE-2026-31417?
CVE-2026-31417 is a high-severity vulnerability; its CVE record was published on April 13, 2026. In the Linux kernel, the following vulnerability has been resolved: net/x25: Fix overflow when accumulating packets Add a check to ensure that x25_sock.fraglen does not overflow. The fraglen also needs to be resetted when purging fragment_queue in x25clearqueues().
When was the CVE record for CVE-2026-31417 published?
The CVE record for CVE-2026-31417 was published on April 13, 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 15, 2026; the record at its source may have been updated since.
Is CVE-2026-31417 actively exploited?
CVE-2026-31417 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-31417?
CVE-2026-31417 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-31417?
A fix for CVE-2026-31417 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-31417 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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