CVE-2026-31623

MEDIUM EPSS 2.6%
Published Apr 24, 20262mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-120

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥2.6.31  –  <6.6.136
linuxlinux_kernel*≥6.7  –  <6.12.83
linuxlinux_kernel*≥6.13  –  <6.18.24
linuxlinux_kernel*≥6.19  –  <6.19.14
linuxlinux_kernel*≥7.0  –  <7.0.1

References 9

  • git.kernel.org https://git.kernel.org/stable/c/0c5c65a17db729fc63ab656bdaaf0e675a9dbeac
  • git.kernel.org https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6053620fdbcd89fa7e755644efdaab78e0daaae7
  • git.kernel.org https://git.kernel.org/stable/c/6807ff49bf796b3823b1e29f97b69316a40a9a94
  • git.kernel.org https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46
    Patch