CVE-2026-31616

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-31616
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_phonet: fix skb frags[] overflow in pn_rx_complete() A broken/bored/mean USB host can overflow the skb_shared_info->frags[] array on a Linux gadget exposing a Phonet function by sending an unbounded sequence of full-page OUT transfers. pn_rx_complete() finalizes the skb only when req->actual < req->length, where req->length is set to PAGE_SIZE by the gadget. If the host always sends exactly PAGE_SIZE bytes per transfer, fp->rx.skb will never be reset and each completion will add another fragment via skb_add_rx_frag(). Once nr_frags exceeds MAX_SKB_FRAGS (default 17), subsequent frag stores overwrite memory adjacent to the shinfo on the heap. Drop the skb and account a length error when the frag limit is reached, matching the fix applied in t7xx by commit f0813bcd2d9d ("net: wwan: t7xx: fix potential skb->frags overflow in RX path").

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/4e476c25bfcab0535ba7c76a903ae77ca8747711 Patch
https://git.kernel.org/stable/c/66f7471c4042e4eb300e30b5b9d87d1406862673 Patch
https://git.kernel.org/stable/c/9ceff1251904901b0b4e5fe6350fcaffa368ce83 Patch
https://git.kernel.org/stable/c/bd44ce09b9b569f49ed13e2d87d23d853fc7d6a7 Patch
https://git.kernel.org/stable/c/c088d5dd2fffb4de1fb8e7f57751c8b82942180a Patch
https://git.kernel.org/stable/c/c9315ce9da3632c591666a29de82d3e92d46bec1 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, 17:21

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/4e476c25bfcab0535ba7c76a903ae77ca8747711 - () https://git.kernel.org/stable/c/4e476c25bfcab0535ba7c76a903ae77ca8747711 - Patch
References () https://git.kernel.org/stable/c/66f7471c4042e4eb300e30b5b9d87d1406862673 - () https://git.kernel.org/stable/c/66f7471c4042e4eb300e30b5b9d87d1406862673 - Patch
References () https://git.kernel.org/stable/c/9ceff1251904901b0b4e5fe6350fcaffa368ce83 - () https://git.kernel.org/stable/c/9ceff1251904901b0b4e5fe6350fcaffa368ce83 - Patch
References () https://git.kernel.org/stable/c/bd44ce09b9b569f49ed13e2d87d23d853fc7d6a7 - () https://git.kernel.org/stable/c/bd44ce09b9b569f49ed13e2d87d23d853fc7d6a7 - Patch
References () https://git.kernel.org/stable/c/c088d5dd2fffb4de1fb8e7f57751c8b82942180a - () https://git.kernel.org/stable/c/c088d5dd2fffb4de1fb8e7f57751c8b82942180a - Patch
References () https://git.kernel.org/stable/c/c9315ce9da3632c591666a29de82d3e92d46bec1 - () https://git.kernel.org/stable/c/c9315ce9da3632c591666a29de82d3e92d46bec1 - Patch
CWE CWE-401
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

27 Apr 2026, 14:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/9ceff1251904901b0b4e5fe6350fcaffa368ce83 -

27 Apr 2026, 12:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/c088d5dd2fffb4de1fb8e7f57751c8b82942180a -

24 Apr 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-24 15:16

Updated : 2026-04-28 17:21

NVD link : CVE-2026-31616

Mitre link : CVE-2026-31616

CVE.ORG link : CVE-2026-31616

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime