CVEvulnerability

CVE-2023-34319

7.8 HIGH Published 2023-09-22 Modified 2026-10-15 Official page ↗
Status
Modified
Published
2023-09-22
Last modified
2026-10-15
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-787

Description

The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a way such that not all of the headers would come in one piece. Unfortunately the logic introduced there didn't account for the extreme case of the entire packet being split into as many pieces as permitted by the protocol, yet still being smaller than the area that's specially dealt with to keep all (possible) headers together. Such an unusual packet would therefore trigger a buffer overrun in the driver.

Affected configurations

• xen xen (>= 3.2.0) • debian debian linux 10.0 • linux linux kernel (>= 4.9.336 < 4.10) • linux linux kernel (>= 4.14.302 < 4.14.321) • linux linux kernel (>= 4.19.269 < 4.19.290) • linux linux kernel (>= 5.4.227 < 5.4.252) • linux linux kernel (>= 5.10.159 < 5.10.189) • linux linux kernel (>= 5.15.83 < 5.15.125) • linux linux kernel (>= 6.1.13 < 6.1.44) • linux linux kernel (>= 6.2 < 6.4.9)

Related

Weakness · CWE (1)

  • CWE-787 Out-of-bounds Write weakness

References