What is CVE-2023-53525?

CVE-2023-53525 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.8.17 onward and patched in 5.10.178, 5.15.108, 6.1.25 and others. CVE-2023-53525 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53525?

CVE-2023-53525 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-53525?

Yes, CVE-2023-53525 has been patched. Fixed versions include 5.10.178, 5.15.108, 6.1.25 and others. If you are running Linux kernel 5.8.17 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53525 actively exploited?

CVE-2023-53525 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53525

Medium

In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Allow UD qp_type to join multicast only As for multicast: - The SIDR is the only mode that makes sense; - Besides PS_UDP, other port spaces like PS_IB is also allowed, as it is UD compatible. In this case qkey also needs to be set [1]. This patch allows only UD qp_type to join multicast, and set qkey to default if it's not set, to fix an uninit-value error: the ib->rec.qkey field is accessed without being initialized. ===================================================== BUG: KMSAN: uninit-value in cma_set_qkey drivers/infiniband/core/cma.c:510 [inline] BUG: KMSAN: uninit-value in cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570 cma_set_qkey drivers/infiniband/core/cma.c:510 [inline] cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570 cma_iboe_join_multicast drivers/infiniband/core/cma.c:4782 [inline] rdma_join_multicast+0x2b83/0x30a0 drivers/infiniband/core/cma.c:4814 ucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479 ucma_join_multicast+0x1e3/0x250 drivers/infiniband/core/ucma.c:1546 ucma_write+0x639/0x6d0 drivers/infiniband/core/ucma.c:1732 vfs_write+0x8ce/0x2030 fs/read_write.c:588 ksys_write+0x28c/0x520 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __ia32_sys_write+0xdb/0x120 fs/read_write.c:652 do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline] __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Local variable ib.i created at: cma_iboe_join_multicast drivers/infiniband/core/cma.c:4737 [inline] rdma_join_multicast+0x586/0x30a0 drivers/infiniband/core/cma.c:4814 ucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479 CPU: 0 PID: 29874 Comm: syz-executor.3 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ===================================================== [1] https://lore.kernel.org/linux-rdma/[email protected]/

Package Linux Kernel

Published 2025-10-01

Last modified 2026-04-06

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-908

CVE-2023-53525 is classified as CWE-908

See CWE-908 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 5.8.17, 5.9.2, 5.10 and later are affected. Fixed in 5.10.178, 5.15.108, 6.1.25, 6.2.12, 6.3 and their respective stable series.

Affected from

≥ 5.8.17 ≥ 5.9.2 ≥ 5.10

Fixed in

✓ 5.10.178 5.10.x ✓ 5.15.108 5.15.x ✓ 6.1.25 6.1.x ✓ 6.2.12 6.2.x ✓ 6.3

References

The following references provide additional information about CVE-2023-53525 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/02eabb635bc64bd1e3a7cf887d6d182bffb64b99
Patch
Kernel patch commit
https://git.kernel.org/stable/c/48e8e7851dc0b1584d83817a78fc7108c8904b54
Patch
Kernel patch commit
https://git.kernel.org/stable/c/58e84f6b3e84e46524b7e5a916b53c1ad798bc8f
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2023-53525

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-10-01

Modified 2026-04-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53525?

CVE-2023-53525 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.8.17 onward and has been patched in 5.10.178, 5.15.108, 6.1.25 and others. CVE-2023-53525 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53525?

CVE-2023-53525 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-53525?

Yes — CVE-2023-53525 has been patched. Fixed versions include 5.10.178, 5.15.108, 6.1.25 and others. If you are running Linux kernel 5.8.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53525 actively exploited?

No — CVE-2023-53525 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.