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NVD / CVE Program· CNA Linux

CVE-2026-90416: RDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs

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 03826bc1fa6c90405bf05831f2b501a8368dcd27, 06b62758f81e27ca4c81201c22e3436c6d9ac894, 0b0122fcc923a0271130f5fb71af2cd7e20434d9.

Low priority for now. Upgrade to Linux Linux 03826bc1fa6c90405bf05831f2b501a8368dcd27, 06b62758f81e27ca4c81201c22e3436c6d9ac894, 0b0122fcc923a0271130f5fb71af2cd7e20434d9 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/mlx5: Fix stack out-of-bounds read in cc_params debugfs get_param() reads a congestion parameter as a u32 but formats it with the signed "%d" into an 11-byte stack buffer. A value with bit 31 set, such as 0x80000000, renders as "-2147483648\n" whose full length is 12. snprintf() stores only 11 bytes yet returns 12, so simple_read_from_buffer() treats 12 bytes as valid and reads one byte past lbuf[]. Size the buffer for the widest unsigned decimal, format with "%u" to match the u32, and use scnprintf() so the length passed to simple_read_from_buffer() reflects the bytes actually stored.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 12th 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

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  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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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

    • 4.14affected
    • 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 and later · before 1c5b4f76cd73372c5a8a4c91c95d5a31f141e091affected · git
    • 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 and later · before 06b62758f81e27ca4c81201c22e3436c6d9ac894affected · git
    • 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 and later · before d809cf3f0ed9255abfc73c4730bcf187151422afaffected · git
    • 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 and later · before 0b0122fcc923a0271130f5fb71af2cd7e20434d9affected · git
    • 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 and later · before ce8dfd32a33b578c3abf178f67b4c8d36854f041affected · git
    • 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 and later · before 4599311e78e88c893ad551aca622de2bfdf1c31faffected · git
    • 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 and later · before c75ee076fa09778a2f9602a972dade4a0b0785f7affected · git
    • 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 and later · before 03826bc1fa6c90405bf05831f2b501a8368dcd27affected · git
    • before 4.14not 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-2026-90414Sep 17, 2026 · IB/isert: reject PDUs declaring more data than was received
    36Monitor
  • ← EarlierCVE-2026-90415Sep 17, 2026 · RDMA/cxgb4: free STAG index when TPT entry write fails
    0Monitor
  • Later →CVE-2026-90417Sep 17, 2026 · RDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()
    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 Linux03826bc1fa6c90405bf05831f2b501a8368dcd27Vendor (CNA)
Linux Linux06b62758f81e27ca4c81201c22e3436c6d9ac894Vendor (CNA)
Linux Linux0b0122fcc923a0271130f5fb71af2cd7e20434d9Vendor (CNA)
Linux Linux1c5b4f76cd73372c5a8a4c91c95d5a31f141e091Vendor (CNA)
Linux Linux4599311e78e88c893ad551aca622de2bfdf1c31fVendor (CNA)
Linux Linuxc75ee076fa09778a2f9602a972dade4a0b0785f7Vendor (CNA)
Linux Linuxce8dfd32a33b578c3abf178f67b4c8d36854f041Vendor (CNA)
Linux Linuxd809cf3f0ed9255abfc73c4730bcf187151422afVendor (CNA)
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