CVE-2026-89439

UNRATEDCVSS · not yet scoredTrending — 4 sources updated this week
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

platform/x86: ISST: Add a NULL check for sst_inst[]

To be consistent with other places, add a NULL check for failed socket loading by checking isst_common.sst_inst[].

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.2%
EPSS %ILE
9th
KEV
Not listed

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

September 11, 2026

Last Modified

September 11, 2026

References (4)

Vendor Advisories for CVE-2026-89439(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
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Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
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Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
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All Vendor Advisories

(1)

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 15× in last 7d / 50× 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.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  3. 2026-10-12 14:48 UTCEG score recompute
  4. 2026-10-11 23:13 UTCVendor advisory
  5. 2026-10-11 23:13 UTCGHSA enrichmentGHSA-9cq2-4366-jjx6
  6. 2026-10-11 19:15 UTCEG score recompute
  7. 2026-10-11 16:32 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  9. 2026-10-11 13:48 UTCEG score recompute
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  12. 2026-10-08 23:44 UTCVendor advisory
  13. 2026-10-08 23:44 UTCGHSA enrichmentGHSA-9cq2-4366-jjx6
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  17. 2026-10-06 00:25 UTCVendor advisory
  18. 2026-10-06 00:25 UTCGHSA enrichmentGHSA-9cq2-4366-jjx6
  19. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  21. 2026-10-03 01:05 UTCVendor advisory
  22. 2026-10-03 01:05 UTCGHSA enrichmentGHSA-9cq2-4366-jjx6
  23. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  25. 2026-09-30 01:45 UTCEG score recompute
Show 30 more
  1. 2026-09-30 01:45 UTCVendor advisory
  2. 2026-09-30 01:45 UTCGHSA enrichmentGHSA-9cq2-4366-jjx6
  3. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  4. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  5. 2026-09-26 19:10 UTCVendor advisory
  6. 2026-09-26 19:10 UTCGHSA enrichmentGHSA-9cq2-4366-jjx6
  7. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  8. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  9. 2026-09-23 19:32 UTCVendor advisory
  10. 2026-09-23 19:32 UTCGHSA enrichmentGHSA-9cq2-4366-jjx6
  11. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  13. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  14. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-09-20 18:59 UTCVendor advisory
  16. 2026-09-20 18:59 UTCGHSA enrichmentGHSA-9cq2-4366-jjx6
  17. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-09-17 19:40 UTCVendor advisory
  19. 2026-09-17 19:40 UTCGHSA enrichmentGHSA-9cq2-4366-jjx6
  20. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  21. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  22. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  23. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-09-14 20:05 UTCEG score recompute
  25. 2026-09-14 20:04 UTCGHSA enrichmentGHSA-9cq2-4366-jjx6
  26. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  27. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  28. 2026-09-11 20:36 UTCNVD update
  29. 2026-09-11 19:52 UTCEG score recompute
  30. 2026-09-11 19:49 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-89439?
CVE-2026-89439 is a vulnerability whose severity is not yet rated; its CVE record was published on September 11, 2026. In the Linux kernel, the following vulnerability has been resolved: platform/x86: ISST: Add a NULL check for sst_inst[] To be consistent with other places, add a NULL check for failed socket loading by checking isstcommon.sstinst[].
When was the CVE record for CVE-2026-89439 published?
The CVE record for CVE-2026-89439 was published on September 11, 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 September 11, 2026; the record at its source may have been updated since.
Is CVE-2026-89439 actively exploited?
CVE-2026-89439 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (9th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-89439?
A fix for CVE-2026-89439 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-89439 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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