CVE-2026-52988

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

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

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. A secondary CVSS source baseline 7.1; 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-2026-38856 (ENISA EUVD) · GHSA-g3ch-wcx8-mmq7 (GitHub Security Advisories)Source: ENISA EUVD

7.1EG
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: 0.1%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

netfilter: nf_tables: join hook list via splice_list_rcu() in commit phase

Publish new hooks in the list into the basechain/flowtable using splice_list_rcu() to ensure netlink dump list traversal via rcu is safe while concurrent ruleset update is going on.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100

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)
Severity71% × 45%
Impact severity (EG Severity): CVSS 7.1 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 every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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
below the 1st
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 (7.1): severity, escalated by confirmed exploitation. This CVE's 7.1 is its impact severity (EG Severity), not escalated.

EG Severity
7.1 HIGHCVSS-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 (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 every mission impact level.CISA BOD 26-04: 60 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 every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 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 partial (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

June 24, 2026

Last Modified

October 19, 2026

Advisory Details (2)

Auto-updated Jun 30, 2026
Patch available.
Web page

netfilter: nf_tables: join hook list via splice_list_rcu() in commit phase - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a6134e62dba2ea4f760b29d5226907f447c92400
Web page

netfilter: nf_tables: join hook list via splice_list_rcu() in commit phase - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1346be9379639c30877083b12747d4eacb83c24f

Vendor Advisories for CVE-2026-52988(2)

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

Patch Availability(12)

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (183 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (141 versions)
  • every version up to 7.0.10-1: fixed in 7.0.10-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(12)

Data Freshness Timeline

(refreshed 9× in last 7d / 51× 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 100 of 325 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. None are among the latest 100 rows. The 225 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 17:39 UTCEG score recompute
  2. 2026-10-27 17:39 UTCVendor advisory
  3. 2026-10-27 17:39 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  4. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  5. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  6. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  7. 2026-10-25 14:21 UTCEG score recompute
  8. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  9. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  10. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  11. 2026-10-19 20:40 UTCEG score recompute
  12. 2026-10-19 20:40 UTCVendor advisory
  13. 2026-10-19 20:40 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  14. 2026-10-19 20:07 UTCEG score recompute
  15. 2026-10-19 20:07 UTCVendor advisory
  16. 2026-10-19 20:07 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  17. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-18 03:32 UTCEG score recompute
  20. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-16 17:08 UTCEG score recompute
  22. 2026-10-16 17:08 UTCVendor advisory
  23. 2026-10-16 17:08 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  24. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-16 15:44 UTCEG score recompute
Show 75 more
  1. 2026-10-16 15:44 UTCVendor advisory
  2. 2026-10-16 15:44 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  3. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-10-12 15:58 UTCEG score recompute
  8. 2026-10-11 19:41 UTCEG score recompute
  9. 2026-10-11 16:56 UTCEG score recompute
  10. 2026-10-11 14:19 UTCEG score recompute
  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 17:12 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  19. 2026-10-03 11:35 UTCEG score recompute
  20. 2026-10-03 11:35 UTCVendor advisory
  21. 2026-10-03 11:35 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  22. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  23. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  25. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  26. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  27. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  28. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  29. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  30. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-09-23 11:27 UTCEG score recompute
  32. 2026-09-23 11:27 UTCVendor advisory
  33. 2026-09-23 11:27 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  34. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  35. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  36. 2026-09-18 08:05 UTCEG score recompute
  37. 2026-09-18 08:05 UTCVendor advisory
  38. 2026-09-18 08:05 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  39. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  40. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-09-14 01:53 UTCEG score recompute
  42. 2026-09-14 01:53 UTCVendor advisory
  43. 2026-09-14 01:53 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  44. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  45. 2026-09-13 09:58 UTCVendor advisory
  46. 2026-09-13 09:58 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  47. 2026-09-12 17:00 UTCEG score recompute
  48. 2026-09-12 17:00 UTCVendor advisory
  49. 2026-09-12 17:00 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  50. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  51. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  52. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  53. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  54. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  55. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  56. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  57. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  58. 2026-08-30 20:13 UTCEG score recompute
  59. 2026-08-30 20:13 UTCVendor advisory
  60. 2026-08-30 20:13 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  61. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  62. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  63. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  64. 2026-08-28 04:47 UTCEG score recompute
  65. 2026-08-28 04:47 UTCVendor advisory
  66. 2026-08-28 04:47 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  67. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  68. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  69. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  70. 2026-08-25 01:39 UTCEG score recompute
  71. 2026-08-25 01:39 UTCVendor advisory
  72. 2026-08-25 01:38 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1
  73. 2026-08-24 13:43 UTCEG score recompute
  74. 2026-08-24 13:43 UTCVendor advisory
  75. 2026-08-24 13:42 UTCGHSA enrichmentGHSA-g3ch-wcx8-mmq7 · GitHub severity HIGH · GitHub CVSS 7.1

Frequently asked(5)

What is CVE-2026-52988?
CVE-2026-52988 is a high-severity vulnerability; its CVE record was published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: join hook list via splicelist_rcu() in commit phase Publish new hooks in the list into the basechain/flowtable using splicelistrcu() to ensure netlink dump list traversal via rcu is safe while concurrent…
When was the CVE record for CVE-2026-52988 published?
The CVE record for CVE-2026-52988 was published on June 24, 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-2026-52988 actively exploited?
CVE-2026-52988 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (below the 1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-52988?
CVE-2026-52988 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-52988?
A fix for CVE-2026-52988 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-52988 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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