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Vulnerabilities

Vulnerability · CVE-2025-9558

There is a potential OOB Write vulnerability in the gen_prov_start function in pb_adv.c.

Published Nov 26, 2025 · catalog updated Oct 13, 2026 · Zephyr

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-9558. EPSS is 0.20%. Act only if a listed version of Zephyr is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.20%
Remediation
Version ranges on file
Affected products
vendor zephyrproject-rtos Zephyr * <4.2.2

There is a potential OOB Write vulnerability in the gen_prov_start function in pb_adv.c. The full length of the received data is copied into the link.rx.buf receiver buffer without any validation on the data size.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor zephyrproject-rtos Zephyr * <4.2.2* <4.2.2

How to fix CVE-2025-9558

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-9558. EPSS is 0.20%. Act only if a listed version of Zephyr is installed.

Which versions are affected?

Compare what you have installed with zephyrproject-rtos Zephyr * <4.2.2 * <4.2.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.20%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 26, 2025 · EUVD

    Detected

    There is a potential OOB Write vulnerability in the gen_prov_start function in pb_adv.c. The full length of the received data is copied into the link.rx.buf receiver buffer without any validation on the data size.

  2. Oct 13, 2026 · EUVD

    Updated

    There is a potential OOB Write vulnerability in the gen_prov_start function in pb_adv.c. The full length of the received data is copied into the link.rx.buf receiver buffer without any validation on the data size.

Sources

  • CVE.orgVulnerability recordCVE-2025-9558

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-9558

    30-day exploitation probability 0.20%

    first.org
  • EUVDVulnerability recordEUVD-2025-199712

    There is a potential OOB Write vulnerability in the gen_prov_start function in pb_adv.c. The full length of the received data is copied into the link.rx.buf receiver buffer without any validation on the data size.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026