CVE-2026-98370

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:

xfrm: fix compat ALLOCSPI request use-after-free

xfrm_state_netlink() builds the ALLOCSPI response with dump_one_state(), which already calls alloc_compat() with the response skb and header.

xfrm_alloc_userspi() then calls alloc_compat() again, but passes the original request skb and its header. For a compat request, the translator therefore interprets the 228-byte compat xfrm_userspi_info as the 232-byte native layout and reads four bytes past the declared payload. It also publishes the translated child through the request's frag_list.

A multicast clone of the request shares skb_shared_info and can observe that child. xfrm_user_rcv_msg() frees it after the request handler returns, racing a compat receiver which may still be copying from it and resulting in a use-after-free.

Remove the redundant conversion. The response keeps its correct compat translation from dump_one_state(), and no child is attached to the inbound request.

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
6th
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

October 6, 2026

Last Modified

October 6, 2026

References (8)

Vendor Advisories for CVE-2026-98370(2)

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
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
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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
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Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (181 versions)
  • every version up to 7.2.8-1: fixed in 7.2.8-1
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Data Freshness Timeline

(refreshed 14× in last 7d / 18× 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% · 6th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-10-12 14:38 UTCEG score recompute
  4. 2026-10-11 19:10 UTCEG score recompute
  5. 2026-10-11 16:24 UTCEG score recompute
  6. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  7. 2026-10-11 13:37 UTCEG score recompute
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-09 11:41 UTCEG score recompute
  11. 2026-10-09 11:41 UTCVendor advisory
  12. 2026-10-09 11:41 UTCGHSA enrichmentGHSA-xf8r-gcp9-vg22
  13. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-10-06 09:28 UTCNVD update
  17. 2026-10-06 08:53 UTCEG score recompute
  18. 2026-10-06 08:52 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-98370?
CVE-2026-98370 is a vulnerability whose severity is not yet rated; its CVE record was published on October 6, 2026. In the Linux kernel, the following vulnerability has been resolved: xfrm: fix compat ALLOCSPI request use-after-free xfrmstatenetlink() builds the ALLOCSPI response with dumponestate(), which already calls alloc_compat() with the response skb and header. xfrmallocuserspi() then calls alloc_compat()…
When was the CVE record for CVE-2026-98370 published?
The CVE record for CVE-2026-98370 was published on October 6, 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 6, 2026; the record at its source may have been updated since.
Is CVE-2026-98370 actively exploited?
CVE-2026-98370 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-98370?
A fix for CVE-2026-98370 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-98370 are linked in the Vendor Advisories panel on this page.

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