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NVD / CVE Program· CNA Linux

CVE-2026-97596: ipvs: reject invalid states in connection template sync records

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 0c61f7d8e18a978aec2a16d9acd5f682f1c72476, 1a8f15911352bb3cf4663aa02049c49c7f30e524, 50c3f06222eafe9cca7ca51a0ef83311d7cab353; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0c61f7d8e18a978aec2a16d9acd5f682f1c72476, 1a8f15911352bb3cf4663aa02049c49c7f30e524, 50c3f06222eafe9cca7ca51a0ef83311d7cab353; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: ipvs: reject invalid states in connection template sync records IPVS sync receivers validate protocol states before creating or updating a connection. For connection templates, however, they only log states outside the template state range and still store the value in the connection. A template can be returned by ordinary connection lookup. TCP and SCTP then use the invalid state as an index into their transition tables. Reject invalid template states in both sync protocol versions before looking up or modifying a connection. The version 1 path handles both IPv4 and IPv6 records.

—No exploit Fix available
Published
Sep 25, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.19affected
    • 275411430f892407b885be1de2548b2e632892c3 and later · before 5677e81ffdbfc1c03dcb427fb8b1c38289bed76daffected · git
    • 275411430f892407b885be1de2548b2e632892c3 and later · before d4eb339b442a0ffaa565779b975494a0a0664f18affected · git
    • 275411430f892407b885be1de2548b2e632892c3 and later · before 1a8f15911352bb3cf4663aa02049c49c7f30e524affected · git
    • 275411430f892407b885be1de2548b2e632892c3 and later · before 652d9caa5ac925ab012834e325d77b9ed638d4fcaffected · git
    • 275411430f892407b885be1de2548b2e632892c3 and later · before fc10dc4511e6e2e2b4098ee115c8e5639471f23daffected · git
    • 275411430f892407b885be1de2548b2e632892c3 and later · before 50c3f06222eafe9cca7ca51a0ef83311d7cab353affected · git
    • 275411430f892407b885be1de2548b2e632892c3 and later · before 0c61f7d8e18a978aec2a16d9acd5f682f1c72476affected · git
    • 275411430f892407b885be1de2548b2e632892c3 and later · before 74cb39735b6cd0aff4b5584158f09376fd97aadfaffected · git
    • before 4.19not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.7-17.2.7-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-97594Sep 25, 2026 · landlock: Fix use-after-free of the source's parent directory
    31Monitor
  • ← EarlierCVE-2026-97595Sep 25, 2026 · mac802154: fix use-after-free of sdata via queued RX frames
    30Monitor
  • Later →CVE-2026-97597Sep 25, 2026 · ipv6: flowlabel: cap duplicate leases per socket
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0c61f7d8e18a978aec2a16d9acd5f682f1c72476Vendor (CNA)
Linux Linux1a8f15911352bb3cf4663aa02049c49c7f30e524Vendor (CNA)
Linux Linux50c3f06222eafe9cca7ca51a0ef83311d7cab353Vendor (CNA)
Linux Linux5677e81ffdbfc1c03dcb427fb8b1c38289bed76dVendor (CNA)
Linux Linux652d9caa5ac925ab012834e325d77b9ed638d4fcVendor (CNA)
Linux Linux74cb39735b6cd0aff4b5584158f09376fd97aadfVendor (CNA)
Linux Linuxd4eb339b442a0ffaa565779b975494a0a0664f18Vendor (CNA)
Linux Linuxfc10dc4511e6e2e2b4098ee115c8e5639471f23dVendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records