CVE-2026-31623

medium

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 cl…

Vendor / product: Linux — linux kernel

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

5.5

5.5 (CVSS v3.1)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2026-04-24 15:16

Modified: 2026-11-11 23:10

NVD status: Modified

Last synced 3 hours ago

Verified against the source API 2026-11-11 23:13 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

linux / linux_kernel ≥2.6.31 <6.6.136, ≥6.7 <6.12.83, ≥6.13 <6.18.24, ≥6.19 <6.19.14, ≥7.0 <7.0.1

Weakness classification (CWE)

CWE-120

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Patch / mitigation: https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7

Patch / mitigation: https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801

Patch / mitigation: https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c

Patch / mitigation: https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5

Patch / mitigation: https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f

Patch / mitigation: https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46

References

https://git.kernel.org/stable/c/0c5c65a17db729fc63ab656bdaaf0e675a9dbeac 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6053620fdbcd89fa7e755644efdaab78e0daaae7 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6807ff49bf796b3823b1e29f97b69316a40a9a94 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Data sources

NVD CVE API 2.0 — fetched 2026-11-11 23:13 UTC · record ↗

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CVE-2026-31623

Affected products

Weakness classification (CWE)

Mitigation & advisories

References

Data sources

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