Description
In the Linux kernel, the following vulnerability has been resolved:

HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition

In the ssi_protocol_probe() function, &ssi->work is bound with
ssip_xmit_work(), In ssip_pn_setup(), the ssip_pn_xmit() function
within the ssip_pn_ops structure is capable of starting the
work.

If we remove the module which will call ssi_protocol_remove()
to make a cleanup, it will free ssi through kfree(ssi),
while the work mentioned above will be used. The sequence
of operations that may lead to a UAF bug is as follows:

CPU0 CPU1

| ssip_xmit_work
ssi_protocol_remove |
kfree(ssi); |
| struct hsi_client *cl = ssi->cl;
| // use ssi

Fix it by ensuring that the work is canceled before proceeding
with the cleanup in ssi_protocol_remove().
Published: 2025-04-18
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4178-1 linux security update
Debian DLA Debian DLA DLA-4193-1 linux-6.1 security update
Debian DSA Debian DSA DSA-5907-1 linux security update
EUVD EUVD EUVD-2025-11838 In the Linux kernel, the following vulnerability has been resolved: HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition In the ssi_protocol_probe() function, &ssi->work is bound with ssip_xmit_work(), In ssip_pn_setup(), the ssip_pn_xmit() function within the ssip_pn_ops structure is capable of starting the work. If we remove the module which will call ssi_protocol_remove() to make a cleanup, it will free ssi through kfree(ssi), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | ssip_xmit_work ssi_protocol_remove | kfree(ssi); | | struct hsi_client *cl = ssi->cl; | // use ssi Fix it by ensuring that the work is canceled before proceeding with the cleanup in ssi_protocol_remove().
Ubuntu USN Ubuntu USN USN-7594-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7594-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7594-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7654-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7654-2 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7654-3 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7654-4 Linux kernel (KVM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7654-5 Linux kernel (Xilinx ZynqMP) vulnerabilities
Ubuntu USN Ubuntu USN USN-7655-1 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-7686-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-7711-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7712-1 Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7712-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7853-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7853-2 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7854-1 Linux kernel (KVM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7861-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7863-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7861-2 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7864-1 Linux kernel (GCP and GKE) vulnerabilities
Ubuntu USN Ubuntu USN USN-7853-3 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7865-1 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7861-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7874-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7874-2 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7861-4 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7875-1 Linux kernel (Oracle) vulnerabilities
Ubuntu USN Ubuntu USN USN-7861-5 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7874-3 Linux kernel (IoT) vulnerabilities
Ubuntu USN Ubuntu USN USN-7935-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7937-1 Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7939-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7939-2 Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7940-1 Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7940-2 Linux kernel (Azure, N-Series) vulnerabilities
History

Mon, 03 Nov 2025 20:30:00 +0000

Type Values Removed Values Added
References

Fri, 02 May 2025 06:30:00 +0000

Type Values Removed Values Added
References

Fri, 25 Apr 2025 19:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel

Fri, 25 Apr 2025 10:30:00 +0000

Type Values Removed Values Added
References

Mon, 21 Apr 2025 15:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Mon, 21 Apr 2025 14:00:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Sun, 20 Apr 2025 08:45:00 +0000

Type Values Removed Values Added
References

Fri, 18 Apr 2025 14:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition In the ssi_protocol_probe() function, &ssi->work is bound with ssip_xmit_work(), In ssip_pn_setup(), the ssip_pn_xmit() function within the ssip_pn_ops structure is capable of starting the work. If we remove the module which will call ssi_protocol_remove() to make a cleanup, it will free ssi through kfree(ssi), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | ssip_xmit_work ssi_protocol_remove | kfree(ssi); | | struct hsi_client *cl = ssi->cl; | // use ssi Fix it by ensuring that the work is canceled before proceeding with the cleanup in ssi_protocol_remove().
Title HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-11T21:16:05.252Z

Reserved: 2025-04-16T04:51:23.952Z

Link: CVE-2025-37838

cve-icon Vulnrichment

Updated: 2025-11-03T19:56:09.541Z

cve-icon NVD

Status : Modified

Published: 2025-04-18T15:15:59.090

Modified: 2025-11-03T20:18:37.903

Link: CVE-2025-37838

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-04-18T00:00:00Z

Links: CVE-2025-37838 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses