CVE-2026-31623 (GCVE-0-2026-31623)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-04-27 13:57
VLAI?
Title
net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 87cf65601e1709e57f7e28f0f7b3eb0a992c1782 , < d4e1946bea8d6441835eb3fd09b19237ba366a6f (git)
Affected: 87cf65601e1709e57f7e28f0f7b3eb0a992c1782 , < a23b1b1aaf41e174181d5853a70e65d4d01e648c (git)
Affected: 87cf65601e1709e57f7e28f0f7b3eb0a992c1782 , < c183d5775129a0a7495bd61a6e57ec230dcf01e5 (git)
Affected: 87cf65601e1709e57f7e28f0f7b3eb0a992c1782 , < ebf75c6301c4972a87542ebf2d994c6391eb5d46 (git)
Affected: 87cf65601e1709e57f7e28f0f7b3eb0a992c1782 , < 9989938d13cc5ba8447eeed5a61acfcf61bc6801 (git)
Affected: 87cf65601e1709e57f7e28f0f7b3eb0a992c1782 , < 600dc40554dc5ad1e6f3af51f700228033f43ea7 (git)
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    Linux Linux Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0.1 , ≤ 7.0.* (semver)
Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)
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  }
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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