SB20260918378 - Race condition in Linux kernel ulp isert driver
Published: September 18, 2026
Security Bulletin ID
SB20260918378
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Race condition (CVE-ID: CVE-2026-90294)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a race condition in iSER target login-response handling when an initiator submits a SCSI command immediately after receiving the final Login Response. A remote attacker can send a specially timed SCSI command to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0d2efc355982064855f24f73f9fbb6c65ca4a5c7
- https://git.kernel.org/stable/c/11694889c4bab47047a60690ceb70d7551ed5b2e
- https://git.kernel.org/stable/c/4397ea31e3b0d017c2b9b876b326df0b3eb845bf
- https://git.kernel.org/stable/c/464f5afa92d071a226f88424803b0fcf88093ede
- https://git.kernel.org/stable/c/a18fb8d540b3e631cb7e50e55f3c462c05b3a114
- https://git.kernel.org/stable/c/a6c19af05c170f267eca1d01c3c72c84ba7860ae
- https://git.kernel.org/stable/c/e148dbac43308d9e4313070bfc5b355d03134809
- https://git.kernel.org/stable/c/f84e9adf4d9f4c0c79ef4a7d9e0c5c08b1337033