CVE-2026-31430
7.1 HIGHIn the Linux kernel, the following vulnerability has been resolved: X.509: Fix out-of-bounds access when parsing extensions Leo reports...
Published: 2026-04-20 · Last updated: 2026-05-21
Severity and scoring
- CVSS
- 7.1 HIGH
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- CWE
- CWE-125
Affected products
| Vendor | Product |
|---|---|
| linux | linux_kernel |
Description
In the Linux kernel, the following vulnerability has been resolved: X.509: Fix out-of-bounds access when parsing extensions Leo reports an out-of-bounds access when parsing a certificate with empty Basic Constraints or Key Usage extension because the first byte of the extension is read before checking its length. Fix it. The bug can be triggered by an unprivileged user by submitting a specially crafted certificate to the kernel through the keyrings(7) API. Leo has demonstrated this with a proof-of-concept program responsibly disclosed off-list.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-31430
- [Patch]https://git.kernel.org/stable/c/206121294b9cf27f0589857f80d64f87e496ffb2
- [Patch]https://git.kernel.org/stable/c/30ab358fad0c7daa1d282ec48089901b21b36a20
- [Patch]https://git.kernel.org/stable/c/672b526def1f94c1be8eb11b885b803da0d8c2f1
- [Patch]https://git.kernel.org/stable/c/7fb4dadc2734f4020d7543d688b8d49c8e569c61
- [Patch]https://git.kernel.org/stable/c/d702c3408213bb12bd570bb97204d8340d141c51
Related CVEs
Same vendor
- CVE-2026-46273 — In the Linux kernel, the following vulnerability has been resolved: ibmveth: Disable GSO for packets with small MSS Some physical adapt... (8.6 HIGH)
- CVE-2026-46272 — In the Linux kernel, the following vulnerability has been resolved: coresight: tmc-etr: Fix race condition between sysfs and perf mode ... (4.7 MEDIUM)
- CVE-2026-46271 — In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: do WoW offloads only on primary link In case of multi... (7.8 HIGH)
- CVE-2026-46270 — In the Linux kernel, the following vulnerability has been resolved: power: supply: rt9455: Fix use-after-free in power_supply_changed() ... (8.4 HIGH)
- CVE-2026-46269 — In the Linux kernel, the following vulnerability has been resolved: pinctrl: canaan: k230: Fix NULL pointer dereference when parsing dev... (5.5 MEDIUM)
Same CWE
- CVE-2026-4367 — A flaw was found in libXpm (5.5 MEDIUM)
- CVE-2026-47963 — DNG SDK versions 1.7.1 2536 and earlier are affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive me... (5.5 MEDIUM)
- CVE-2026-47934 — DNG SDK versions 1.7.1 2536 and earlier are affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive me... (5.5 MEDIUM)
- CVE-2026-47927 — DNG SDK versions 1.7.1 2536 and earlier are affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive me... (5.5 MEDIUM)
- CVE-2026-47748 — stable-diffusion.cpp is a pure C/C++ library for running diffusion model (Stable Diffusion, Flux, Wan, Qwen Image, Z-Image, and more) inf... (5.5 MEDIUM)