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CVE Record

CVE-2026-23070: Octeontx2-af: Add proper checks for fwdata

In the Linux kernel, the following vulnerability has been resolved: Octeontx2-af: Add proper checks for fwdata firmware populates MAC address, link modes (supported, advertised) and EEPROM data in shared firmware structure which kernel access via MAC block(CGX/RPM). Accessing fwdata, on boards booted with out MAC block leading to kernel panics. Internal error: Oops: 0000000096000005 [#1] SMP [ 10.460721] Modules linked in: [ 10.463779] CPU: 0 UID: 0 PID: 174 Comm: kworker/0:3 Not tainted 6.19.0-rc5-00154-g76ec646abdf7-dirty #3 PREEMPT [ 10.474045] Hardware name: Marvell OcteonTX CN98XX board (DT) [ 10.479793] Workqueue: events work_for_cpu_fn [ 10.484159] pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 10.491124] pc : rvu_sdp_init+0x18/0x114 [ 10.495051] lr : rvu_probe+0xe58/0x1d18

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue can make certain Marvell OcteonTX2 systems crash during boot or driver initialization. The crash occurs when firmware data is accessed on boards that lack the expected MAC block. The business risk is mainly service availability on specialized hardware, not broadly exposed internet attack surface.

Executive priority

Treat this as a targeted availability risk. It is not presented as mass-exploitable, but affected appliances or servers could fail during boot or initialization until patched.

Technical view

The Octeontx2-af driver reads firmware-populated MAC, link mode, and EEPROM fields through CGX/RPM. On systems booted without the MAC block, insufficient fwdata checks can trigger a kernel Oops in rvu_sdp_init during rvu_probe. Stable kernel commits add validation before accessing that firmware data.

Likely exposure

Exposure appears limited to Linux systems using the Octeontx2-af networking driver on affected Marvell OcteonTX/CN98XX-class hardware or similar boards with missing MAC block conditions.

Exploitation context

The bundle does not report active exploitation, KEV listing, exploit availability, or a remote attack path. Evidence supports a kernel panic condition under specific hardware and firmware layout assumptions.

Researcher notes

Key gaps are missing CVSS, CWE, and precise distro package ranges. Analysis should stay tied to the kernel commits and hardware preconditions. Do not infer network-triggered exploitation from the available description.

Mitigation direction

  • Apply a kernel update containing the referenced stable fixes.
  • Check distribution advisories for backported fixes for your deployed kernel branch.
  • Prioritize affected OcteonTX2 systems with production availability requirements.
  • If patching is delayed, follow vendor guidance for hardware-specific workarounds.

Validation and detection

  • Inventory Linux hosts using Marvell OcteonTX2 or CN98XX hardware.
  • Check whether the octeontx2-af driver is present or loaded.
  • Compare running kernel builds against vendor fixed packages or referenced commits.
  • Review boot logs for rvu_probe, rvu_sdp_init, or kernel Oops messages.
  • Confirm patched systems boot cleanly on affected board variants.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2026-23070 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
4Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux997814491cee7b19c162ad82439818e555f99ad9, 997814491cee7b19c162ad82439818e555f99ad9, 997814491cee7b19c162ad82439818e555f99ad9unaffected
LinuxLinux6.9, 0, 6.12.78, 6.18.8, 6.19affected
Weakness

CWE details

No CWE listed

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