CVE-2026-31780

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-31780
In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: fix u8 overflow in SSID scan buffer size calculation The variable valuesize is declared as u8 but accumulates the total length of all SSIDs to scan. Each SSID contributes up to 33 bytes (IEEE80211_MAX_SSID_LEN + 1), and with WILC_MAX_NUM_PROBED_SSID (10) SSIDs the total can reach 330, which wraps around to 74 when stored in a u8. This causes kmalloc to allocate only 75 bytes while the subsequent memcpy writes up to 331 bytes into the buffer, resulting in a 256-byte heap buffer overflow. Widen valuesize from u8 to u32 to accommodate the full range.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0c7f21d8bd2f93998b72b7a7f93152336aeca4dd Patch
https://git.kernel.org/stable/c/34a23fd9ddd683a03c7e8cc0ceded3e59e354b99 Patch
https://git.kernel.org/stable/c/549f02d8ec94d39092ab6d9b103d0d6783a4b024 Patch
https://git.kernel.org/stable/c/9907ac9b9a18b92fc34b9e4cb9e10f208dc1d3f7 Patch
https://git.kernel.org/stable/c/bfbddeadd4779651403035ee177ae2f22f9f5521 Patch
https://git.kernel.org/stable/c/c97b2a00059608592ad0d86fbb813a4f8cf9464b Patch
https://git.kernel.org/stable/c/d049e56b1739101d1c4d81deedb269c52a8dbba0 Patch
https://git.kernel.org/stable/c/d8388614de613c28eeb659c10115060a83739924 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
History

11 May 2026, 20:54

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/0c7f21d8bd2f93998b72b7a7f93152336aeca4dd - () https://git.kernel.org/stable/c/0c7f21d8bd2f93998b72b7a7f93152336aeca4dd - Patch
References () https://git.kernel.org/stable/c/34a23fd9ddd683a03c7e8cc0ceded3e59e354b99 - () https://git.kernel.org/stable/c/34a23fd9ddd683a03c7e8cc0ceded3e59e354b99 - Patch
References () https://git.kernel.org/stable/c/549f02d8ec94d39092ab6d9b103d0d6783a4b024 - () https://git.kernel.org/stable/c/549f02d8ec94d39092ab6d9b103d0d6783a4b024 - Patch
References () https://git.kernel.org/stable/c/9907ac9b9a18b92fc34b9e4cb9e10f208dc1d3f7 - () https://git.kernel.org/stable/c/9907ac9b9a18b92fc34b9e4cb9e10f208dc1d3f7 - Patch
References () https://git.kernel.org/stable/c/bfbddeadd4779651403035ee177ae2f22f9f5521 - () https://git.kernel.org/stable/c/bfbddeadd4779651403035ee177ae2f22f9f5521 - Patch
References () https://git.kernel.org/stable/c/c97b2a00059608592ad0d86fbb813a4f8cf9464b - () https://git.kernel.org/stable/c/c97b2a00059608592ad0d86fbb813a4f8cf9464b - Patch
References () https://git.kernel.org/stable/c/d049e56b1739101d1c4d81deedb269c52a8dbba0 - () https://git.kernel.org/stable/c/d049e56b1739101d1c4d81deedb269c52a8dbba0 - Patch
References () https://git.kernel.org/stable/c/d8388614de613c28eeb659c10115060a83739924 - () https://git.kernel.org/stable/c/d8388614de613c28eeb659c10115060a83739924 - Patch
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
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:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
CWE CWE-787
First Time Linux linux Kernel
Linux

03 May 2026, 07:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8

01 May 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-01 15:16

Updated : 2026-05-11 20:54

NVD link : CVE-2026-31780

Mitre link : CVE-2026-31780

CVE.ORG link : CVE-2026-31780

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-787

Out-of-bounds Write