PT-2026-44357 · Linux · Linux Kernel

Published 2026-05-28 · Updated 2026-06-04 · CVE-2026-46234

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the vsock update buffer size() function where the buffer size clamping order is incorrect. The system clamped the buffer size to the maximum value first and then to the minimum. If a user defines a minimum buffer size that exceeds the maximum, the minimum check overrides the maximum check. This allows the vsk->buffer size variable to grow beyond the configured vsk->buffer max size, breaking intended socket memory boundaries.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-46234

ECHO-118E-D157-3C99

OPENSUSE-SU-2026:10954-1

Affected Products

Linux Kernel

References · 296

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46234.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-46234 · Security Note
• https://ubuntu.com/security/CVE-2026-46234 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10954-1 · Vendor Advisory
• https://git.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaa · Patch
• https://osv.dev/vulnerability/CVE-2026-46234 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-46234 · Vendor Advisory
• https://git.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41 · Patch
• https://git.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227bab · Patch
• https://git.kernel.org/stable/c/caf11dfea5233a69298a1c448bbf8d1639c80536 · Patch
• https://git.kernel.org/stable/c/f6ec135941d2c1c2dbb87b5ce1783f4f6ac6ccca · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-46234 · Vendor Advisory
• https://git.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160 · Patch
• https://git.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536 · Patch
• https://cve.org/CVERecord?id=CVE-2026-46234 · Security Note