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.
References
Configurations
Configuration 1 (hide)
|
History
21 May 2026, 15:28
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-125 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
| CPE | cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/206121294b9cf27f0589857f80d64f87e496ffb2 - Patch | |
| References | () https://git.kernel.org/stable/c/30ab358fad0c7daa1d282ec48089901b21b36a20 - Patch | |
| References | () https://git.kernel.org/stable/c/672b526def1f94c1be8eb11b885b803da0d8c2f1 - Patch | |
| References | () https://git.kernel.org/stable/c/7fb4dadc2734f4020d7543d688b8d49c8e569c61 - Patch | |
| References | () https://git.kernel.org/stable/c/d702c3408213bb12bd570bb97204d8340d141c51 - Patch |
20 Apr 2026, 10:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-20 10:16
Updated : 2026-05-21 15:28
NVD link : CVE-2026-31430
Mitre link : CVE-2026-31430
CVE.ORG link : CVE-2026-31430
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read