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NVD / CVE Program· CNA Linux

CVE-2026-90415: RDMA/cxgb4: free STAG index when TPT entry write fails

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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 2f17ca7ab5269ac2504e1039c3921373dccd7712, 5a21e5114cec4cd3f8a2843d4c46bc49634d6e96, 5fe4731bfbd8d83c4a14b4af3a27329969ce8a99; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 2f17ca7ab5269ac2504e1039c3921373dccd7712, 5a21e5114cec4cd3f8a2843d4c46bc49634d6e96, 5fe4731bfbd8d83c4a14b4af3a27329969ce8a99; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 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: RDMA/cxgb4: free STAG index when TPT entry write fails write_tpt_entry() allocates a new STAG index with c4iw_get_resource() and bumps stats.stag.cur before programming the entry. When write_adapter_mem() fails, it returns the error without releasing the index or reversing the statistic. No MR is inserted into rhp->mrs, so deregistration never reclaims it, leaking the index until device teardown. Record whether this call allocated the index and, on a failed write, return it to tpt_table and decrement stats.stag.cur. Key the rollback on both the write error and that flag, not the error alone: a non-reset update carries a caller-owned STAG that this call did not allocate and must not free.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 7th 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 · 0.1%

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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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

    • 3.5affected
    • ec3eead217181d7360a11317a888ceb30807867c and later · before 5fe4731bfbd8d83c4a14b4af3a27329969ce8a99affected · git
    • ec3eead217181d7360a11317a888ceb30807867c and later · before 8f6976d635d190e3d7af7103daaa581cf1ccc12eaffected · git
    • ec3eead217181d7360a11317a888ceb30807867c and later · before 9eeafcda1d6c11f0eec532243c4e96ec8c632bd7affected · git
    • ec3eead217181d7360a11317a888ceb30807867c and later · before 5a21e5114cec4cd3f8a2843d4c46bc49634d6e96affected · git
    • ec3eead217181d7360a11317a888ceb30807867c and later · before 2f17ca7ab5269ac2504e1039c3921373dccd7712affected · git
    • ec3eead217181d7360a11317a888ceb30807867c and later · before a2e37d1ab773be3cd26b1c19593ca2dbcece9c57affected · git
    • ec3eead217181d7360a11317a888ceb30807867c and later · before a64e2beb450179a5d43034af8d5476a11eac1486affected · git
    • ec3eead217181d7360a11317a888ceb30807867c and later · before fdfb5cea4bf070cdb31d997efd87bb684df041fdaffected · git
    • before 3.5not 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 7.2.6-17.2.6-1

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-2026-90413Sep 17, 2026 · IB/isert: reject login PDUs declaring more data than was received
    36Monitor
  • ← EarlierCVE-2026-90414Sep 17, 2026 · IB/isert: reject PDUs declaring more data than was received
    36Monitor
  • Later →CVE-2026-90416Sep 17, 2026 · RDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs
    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 Linux2f17ca7ab5269ac2504e1039c3921373dccd7712Vendor (CNA)
Linux Linux5a21e5114cec4cd3f8a2843d4c46bc49634d6e96Vendor (CNA)
Linux Linux5fe4731bfbd8d83c4a14b4af3a27329969ce8a99Vendor (CNA)
Linux Linux8f6976d635d190e3d7af7103daaa581cf1ccc12eVendor (CNA)
Linux Linux9eeafcda1d6c11f0eec532243c4e96ec8c632bd7Vendor (CNA)
Linux Linuxa2e37d1ab773be3cd26b1c19593ca2dbcece9c57Vendor (CNA)
Linux Linuxa64e2beb450179a5d43034af8d5476a11eac1486Vendor (CNA)
Linux Linuxfdfb5cea4bf070cdb31d997efd87bb684df041fdVendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · 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).

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