CVE-2026-31623

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-31623
In the Linux kernel, the following vulnerability has been resolved: net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete() A malicious USB device claiming to be a CDC Phonet modem can overflow the skb_shared_info->frags[] array by sending an unbounded sequence of full-page bulk transfers. Drop the skb and increment the length error when the frag limit is reached. This matches the same fix that commit f0813bcd2d9d ("net: wwan: t7xx: fix potential skb->frags overflow in RX path") did for the t7xx driver.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7 Patch
https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801 Patch
https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c Patch
https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5 Patch
https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f Patch
https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46 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:*:*:*:*:*:*:*:*
History

28 Apr 2026, 14:17

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7 - () https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7 - Patch
References () https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801 - () https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801 - Patch
References () https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c - () https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c - Patch
References () https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5 - () https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5 - Patch
References () https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f - () https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f - Patch
References () https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46 - () https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46 - Patch
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-120

27 Apr 2026, 14:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f -

27 Apr 2026, 12:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7 -

24 Apr 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-24 15:16

Updated : 2026-04-28 14:17

NVD link : CVE-2026-31623

Mitre link : CVE-2026-31623

CVE.ORG link : CVE-2026-31623

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')