CVE-2026-31505

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-22. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-24882 (ENISA EUVD) · GHSA-j72v-jx24-rm3p (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
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: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

iavf: fix out-of-bounds writes in iavf_get_ethtool_stats()

iavf incorrectly uses real_num_tx_queues for ETH_SS_STATS. Since the value could change in runtime, we should use num_tx_queues instead.

Moreover iavf_get_ethtool_stats() uses num_active_queues while iavf_get_sset_count() and iavf_get_stat_strings() use real_num_tx_queues, which triggers out-of-bounds writes when we do "ethtool -L" and "ethtool -S" simultaneously [1].

For example when we change channels from 1 to 8, Thread 3 could be scheduled before Thread 2, and out-of-bounds writes could be triggered in Thread 3:

Thread 1 (ethtool -L) Thread 2 (work) Thread 3 (ethtool -S) iavf_set_channels() ... iavf_alloc_queues() -> num_active_queues = 8 iavf_schedule_finish_config() iavf_get_sset_count() real_num_tx_queues: 1 -> buffer for 1 queue iavf_get_ethtool_stats() num_active_queues: 8 -> out-of-bounds! iavf_finish_config() -> real_num_tx_queues = 8

Use immutable num_tx_queues in all related functions to avoid the issue.

[1] BUG: KASAN: vmalloc-out-of-bounds in iavf_add_one_ethtool_stat+0x200/0x270 Write of size 8 at addr ffffc900031c9080 by task ethtool/5800

CPU: 1 UID: 0 PID: 5800 Comm: ethtool Not tainted 6.19.0-enjuk-08403-g8137e3db7f1c #241 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: dump_stack_lvl+0x6f/0xb0 print_report+0x170/0x4f3 kasan_report+0xe1/0x180 iavf_add_one_ethtool_stat+0x200/0x270 iavf_get_ethtool_stats+0x14c/0x2e0 __dev_ethtool+0x3d0c/0x5830 dev_ethtool+0x12d/0x270 dev_ioctl+0x53c/0xe30 sock_do_ioctl+0x1a9/0x270 sock_ioctl+0x3d4/0x5e0 __x64_sys_ioctl+0x137/0x1c0 do_syscall_64+0xf3/0x690 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7da0e6e36d ...

The buggy address belongs to a 1-page vmalloc region starting at 0xffffc900031c9000 allocated at __dev_ethtool+0x3cc9/0x5830 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88813a013de0 pfn:0x13a013 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff88813a013de0 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected

Memory state around the buggy address: ffffc900031c8f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc900031c9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc900031c9080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc900031c9100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc900031c9180: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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
0.2%
EPSS %ILE
5th
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 (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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 (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.

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

April 22, 2026

Last Modified

October 30, 2026

Advisory Details (4)

Auto-updated Jun 6, 2026
Patch available.
Web page

iavf: fix out-of-bounds writes in iavf_get_ethtool_stats() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fecacfc95f195b99c71c579a472120d0b4ed65fa
Web page

iavf: fix out-of-bounds writes in iavf_get_ethtool_stats() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fdf902bf86a80bf15792a1d20a67a5302498d7f1
Web page

iavf: fix out-of-bounds writes in iavf_get_ethtool_stats() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bb85741d2dc2be207353a412f51b83697fcbefcf
Web page

iavf: fix out-of-bounds writes in iavf_get_ethtool_stats() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1f931dee5b726df1940348ec31614d64bac03aa6

Vendor Advisories for CVE-2026-31505(2)

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

Patch Availability(15)

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (358 versions)
  • every version on: no fix on record
—
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 (125 versions)
  • every version up to 6.19.11-1: fixed in 6.19.11-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(14)

Data Freshness Timeline

(refreshed 13× in last 7d / 58× 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 296 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 201 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-30 12:30 UTCEG score recompute
  2. 2026-10-30 12:30 UTCVendor advisory
  3. 2026-10-30 12:30 UTCGHSA enrichmentGHSA-j72v-jx24-rm3p · GitHub severity HIGH · GitHub CVSS 7.8
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  5. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-10-28 07:54 UTCEG score recompute
  7. 2026-10-28 07:54 UTCVendor advisory
  8. 2026-10-28 07:53 UTCGHSA enrichmentGHSA-j72v-jx24-rm3p · GitHub severity HIGH · GitHub CVSS 7.8
  9. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-25 14:36 UTCEG score recompute
  12. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  16. 2026-10-21 13:51 UTCVendor advisory
  17. 2026-10-21 13:50 UTCGHSA enrichmentGHSA-j72v-jx24-rm3p · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-10-21 12:58 UTCVendor advisory
  19. 2026-10-21 12:57 UTCGHSA enrichmentGHSA-j72v-jx24-rm3p · GitHub severity HIGH · GitHub CVSS 7.8
  20. 2026-10-21 12:28 UTCEG score recompute
  21. 2026-10-21 12:28 UTCVendor advisory
  22. 2026-10-21 12:28 UTCGHSA enrichmentGHSA-j72v-jx24-rm3p · GitHub severity HIGH · GitHub CVSS 7.8
  23. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-10-19 19:37 UTCVendor advisory
  25. 2026-10-19 19:36 UTCGHSA enrichmentGHSA-j72v-jx24-rm3p · GitHub severity HIGH · GitHub CVSS 7.8
Show 70 more
  1. 2026-10-19 19:01 UTCEG score recompute
  2. 2026-10-19 19:01 UTCVendor advisory
  3. 2026-10-19 19:00 UTCGHSA enrichmentGHSA-j72v-jx24-rm3p · GitHub severity HIGH · GitHub CVSS 7.8
  4. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  5. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  6. 2026-10-18 03:48 UTCEG score recompute
  7. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  8. 2026-10-16 17:03 UTCEG score recompute
  9. 2026-10-16 17:02 UTCGHSA enrichmentGHSA-j72v-jx24-rm3p · GitHub severity HIGH · GitHub CVSS 7.8
  10. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  11. 2026-10-16 15:36 UTCEG score recompute
  12. 2026-10-16 15:36 UTCVendor advisory
  13. 2026-10-16 15:36 UTCGHSA enrichmentGHSA-j72v-jx24-rm3p · GitHub severity HIGH · GitHub CVSS 7.8
  14. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  16. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-10-12 16:15 UTCEG score recompute
  19. 2026-10-11 19:57 UTCEG score recompute
  20. 2026-10-11 17:10 UTCEG score recompute
  21. 2026-10-11 14:39 UTCEG score recompute
  22. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-10-10 18:03 UTCOSV refresh
  25. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  26. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  27. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  28. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  29. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  30. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  31. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  32. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  33. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  34. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  35. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  36. 2026-09-21 05:19 UTCOSV refresh
  37. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  38. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  39. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  40. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  42. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  43. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  44. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  45. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  46. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  47. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  48. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  49. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  50. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  51. 2026-09-02 03:04 UTCOSV refresh
  52. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  53. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  54. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  55. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  56. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  57. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  58. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  59. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  60. 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  61. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  62. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  63. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  64. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  65. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  66. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  67. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  68. 2026-08-16 05:59 UTCEG score recompute
  69. 2026-08-16 05:59 UTCVendor advisory
  70. 2026-08-16 05:59 UTCGHSA enrichmentGHSA-j72v-jx24-rm3p · GitHub severity HIGH · GitHub CVSS 7.8

Frequently asked(5)

What is CVE-2026-31505?
CVE-2026-31505 is a high-severity vulnerability; its CVE record was published on April 22, 2026. In the Linux kernel, the following vulnerability has been resolved: iavf: fix out-of-bounds writes in iavfgetethtool_stats() iavf incorrectly uses realnumtxqueues for ETHSS_STATS. Since the value could change in runtime, we should use numtxqueues instead. Moreover iavfgetethtoolstats() uses…
When was the CVE record for CVE-2026-31505 published?
The CVE record for CVE-2026-31505 was published on April 22, 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 30, 2026; the record at its source may have been updated since.
Is CVE-2026-31505 actively exploited?
CVE-2026-31505 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-31505?
CVE-2026-31505 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-31505?
A fix for CVE-2026-31505 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-31505 are linked in the Vendor Advisories panel on this page.

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