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NVD / CVE Program· CNA Linux

CVE-2026-43295: rapidio: replace rio_free_net() with kfree() in rio_scan_alloc_net()

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.12% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 34a4f233df5eef5f1f113b2196142c0568b387f8, 649c2e853608cad0b0cba545555d168e67f094b3, 666183dcdd9ad3b8156a1df7f204f728f720380f.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 34a4f233df5eef5f1f113b2196142c0568b387f8, 649c2e853608cad0b0cba545555d168e67f094b3, 666183dcdd9ad3b8156a1df7f204f728f720380f 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: rapidio: replace rio_free_net() with kfree() in rio_scan_alloc_net() When idtab allocation fails, net is not registered with rio_add_net() yet, so kfree(net) is sufficient to release the memory. Set mport->net to NULL to avoid dangling pointer.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 8, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 2th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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  • 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 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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.6 and later · before 5.10.252
  • linux linux kernel5.11 and later · before 5.15.202
  • linux linux kernel5.16 and later · before 6.1.165
  • linux linux kernel6.2 and later · before 6.6.128
  • linux linux kernel6.7 and later · before 6.12.75
  • linux linux kernel6.13 and later · before 6.18.16
  • linux linux kernel6.19 and later · before 6.19.6

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

    • 4.6affected
    • e6b585ca6e81badeb3d42db3cc408174f2826034 and later · before 83e579c2f7f6b1706323d744833b26470049dcc2affected · git
    • e6b585ca6e81badeb3d42db3cc408174f2826034 and later · before 34a4f233df5eef5f1f113b2196142c0568b387f8affected · git
    • e6b585ca6e81badeb3d42db3cc408174f2826034 and later · before fecf292c6691970897396190855aa38826b7104eaffected · git
    • e6b585ca6e81badeb3d42db3cc408174f2826034 and later · before 649c2e853608cad0b0cba545555d168e67f094b3affected · git
    • e6b585ca6e81badeb3d42db3cc408174f2826034 and later · before 87272e3e70ec4b666885bd520ff77463c11444efaffected · git
    • e6b585ca6e81badeb3d42db3cc408174f2826034 and later · before e5a732bfe29451e16abf9c6f07ce5948b22f3d59affected · git
    • e6b585ca6e81badeb3d42db3cc408174f2826034 and later · before 78812c4fb7ed242d5961bf1337a49070d6487c94affected · git
    • e6b585ca6e81badeb3d42db3cc408174f2826034 and later · before 666183dcdd9ad3b8156a1df7f204f728f720380faffected · git
    • before 4.6not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.6-16.19.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-43291May 8, 2026 · net: nfc: nci: Fix parameter validation for packet data
    33Monitor
  • ← EarlierCVE-2026-43293May 8, 2026 · media: chips-media: wave5: Fix kthread worker destruction in polling mode
    22Monitor
  • Later →CVE-2026-43296May 8, 2026 · octeontx2-af: Workaround SQM/PSE stalls by disabling sticky
    30Monitor

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 Linux34a4f233df5eef5f1f113b2196142c0568b387f8Vendor (CNA)
Linux Linux649c2e853608cad0b0cba545555d168e67f094b3Vendor (CNA)
Linux Linux666183dcdd9ad3b8156a1df7f204f728f720380fVendor (CNA)
Linux Linux78812c4fb7ed242d5961bf1337a49070d6487c94Vendor (CNA)
Linux Linux83e579c2f7f6b1706323d744833b26470049dcc2Vendor (CNA)
Linux Linux87272e3e70ec4b666885bd520ff77463c11444efVendor (CNA)
Linux Linuxe5a732bfe29451e16abf9c6f07ce5948b22f3d59Vendor (CNA)
Linux Linuxfecf292c6691970897396190855aa38826b7104eVendor (CNA)
debian:linux6.1.170-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

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

All records