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…
Does this matter?
Lower severity and a low EPSS score (0.13%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-120
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0c5c65a17db729fc63ab656bdaaf0e675a9dbeac
- https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7Patch
- https://git.kernel.org/stable/c/6053620fdbcd89fa7e755644efdaab78e0daaae7
- https://git.kernel.org/stable/c/6807ff49bf796b3823b1e29f97b69316a40a9a94
- https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801Patch
- https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648cPatch
- https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5Patch
- https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6fPatch
- https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.