🛡️ CVE-2026-42903 — windows-10-1607
Description
Null pointer dereference in Windows Kerberos allows an authorized attacker to deny service over a network.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.
Weakness class
CVE-2026-42903 is classified as CWE-476: NULL Pointer Dereference. A pointer that can be null is used without a check, crashing the process.
Affected software
CVE-2026-42903 is recorded against 14 packages.
- unknown
- windows-10-1607 (fixed in 10.0.14393.9234)
- windows-10-1809 (fixed in 10.0.17763.8880)
- windows-10-21h2 (fixed in 10.0.19044.7417)
- windows-10-22h2 (fixed in 10.0.19045.7417)
- windows-11-23h2 (fixed in 10.0.22631.7219)
- windows-11-24h2 (fixed in 10.0.26100.8655)
- windows-11-25h2 (fixed in 10.0.26200.8655)
- windows-11-26h1 (fixed in 10.0.28000.2269)
- windows-server-2012
- windows-server-2016 (fixed in 10.0.14393.9234)
- windows-server-2019 (fixed in 10.0.17763.8880)
- windows-server-2022 (fixed in 10.0.20348.5256)
- windows-server-2025 (fixed in 10.0.26100.32995)
Timeline and source
Published on 9 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.
References
Details
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| unknown | — | — |
| windows-10-1607 | — | 10.0.14393.9234 |
| windows-10-1809 | — | 10.0.17763.8880 |
| windows-10-21h2 | — | 10.0.19044.7417 |
| windows-10-22h2 | — | 10.0.19045.7417 |
| windows-11-23h2 | — | 10.0.22631.7219 |
| windows-11-24h2 | — | 10.0.26100.8655 |
| windows-11-25h2 | — | 10.0.26200.8655 |
| windows-11-26h1 | — | 10.0.28000.2269 |
| windows-server-2012 | — | — |
| windows-server-2016 | — | 10.0.14393.9234 |
| windows-server-2019 | — | 10.0.17763.8880 |
| windows-server-2022 | — | 10.0.20348.5256 |
| windows-server-2025 | — | 10.0.26100.32995 |
Similar Threats
- Unknown CVE-2022-0003
- Unknown CVE-2022-0303
- High CVE-2022-1206
- Unknown CVE-2022-0931
- Unknown CVE-2022-0094
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
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