CVE-2026-31616
5.5 MEDIUMIn the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_phonet: fix skb frags[] overflow in pn_rx_complete() ...
Published: 2026-04-24 · Last updated: 2026-06-01
Severity and scoring
- CVSS
- 5.5 MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CWE
- CWE-401
Affected products
| Vendor | Product |
|---|---|
| linux | linux_kernel |
Description
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").
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-31616
- [Other]https://git.kernel.org/stable/c/3d7f7e0c842242878c24b2facff8d6eda23ee1e9
- [Patch]https://git.kernel.org/stable/c/4e476c25bfcab0535ba7c76a903ae77ca8747711
- [Patch]https://git.kernel.org/stable/c/66f7471c4042e4eb300e30b5b9d87d1406862673
- [Other]https://git.kernel.org/stable/c/7424f0287da73d3d8c5fa5e9d25d26fce762708e
- [Patch]https://git.kernel.org/stable/c/9ceff1251904901b0b4e5fe6350fcaffa368ce83
- [Other]https://git.kernel.org/stable/c/b5ec49fa198bd08967a3102bd41f53ccadce72c9
- [Patch]https://git.kernel.org/stable/c/bd44ce09b9b569f49ed13e2d87d23d853fc7d6a7
- [Patch]https://git.kernel.org/stable/c/c088d5dd2fffb4de1fb8e7f57751c8b82942180a
- [Patch]https://git.kernel.org/stable/c/c9315ce9da3632c591666a29de82d3e92d46bec1
Related CVEs
Same vendor
- CVE-2026-46273 — In the Linux kernel, the following vulnerability has been resolved: ibmveth: Disable GSO for packets with small MSS Some physical adapt... (8.6 HIGH)
- CVE-2026-46272 — In the Linux kernel, the following vulnerability has been resolved: coresight: tmc-etr: Fix race condition between sysfs and perf mode ... (4.7 MEDIUM)
- CVE-2026-46271 — In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: do WoW offloads only on primary link In case of multi... (7.8 HIGH)
- CVE-2026-46270 — In the Linux kernel, the following vulnerability has been resolved: power: supply: rt9455: Fix use-after-free in power_supply_changed() ... (8.4 HIGH)
- CVE-2026-46269 — In the Linux kernel, the following vulnerability has been resolved: pinctrl: canaan: k230: Fix NULL pointer dereference when parsing dev... (5.5 MEDIUM)
Same CWE
- CVE-2026-0646 — A denial-of-service security issue exists within the 1794-AENTR adapter due to improper memory handling of CIP protocol requests
- CVE-2026-48059 — Netty is a network application framework for development of protocol servers and clients (7.5 HIGH)
- CVE-2026-48043 — Netty is a network application framework for development of protocol servers and clients (5.3 MEDIUM)
- CVE-2026-48006 — Netty is a network application framework for development of protocol servers and clients (7.5 HIGH)
- CVE-2026-20746 — Virtual attribute handling in Ping Identity PingDirectory in affected versions allows only authorized users to exhaust java memory heap w...