SB20260626180 - Out-of-bounds write in Linux kernel ulp isert driver

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260626180

SB20260626180 - Out-of-bounds write in Linux kernel ulp isert driver

Published: June 26, 2026

Security Bulletin ID SB20260626180
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-53176)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an out-of-bounds write in isert_login_recv_done() and isert_rx_login_req() in drivers/infiniband/ulp/isert/ib_isert.c when processing a login PDU shorter than ISER_HEADERS_LEN. A remote attacker can send a specially crafted login send work request to cause a denial of service.

The vulnerable code path is reachable during the login phase before iSCSI authentication.


Remediation

Install update from vendor's website.

References