CVE-2025-21873

Medium

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: bsg: Fix crash when arpmb command fails If the device doesn't support arpmb we'll crash due to copying user data in bsg_transport_sg_io_fn(). In the case where ufs_bsg_exec_advanced_rpmb_req() returns an error, do not set the job's reply_len. Memory crash backtrace: 3,1290,531166405,-;ufshcd 0000:00:12.5: ARPMB OP failed: error code -22 4,1308,531166555,-;Call Trace: 4,1309,531166559,-; <TASK> 4,1310,531166565,-; ? show_regs+0x6d/0x80 4,1311,531166575,-; ? die+0x37/0xa0 4,1312,531166583,-; ? do_trap+0xd4/0xf0 4,1313,531166593,-; ? do_error_trap+0x71/0xb0 4,1314,531166601,-; ? usercopy_abort+0x6c/0x80 4,1315,531166610,-; ? exc_invalid_op+0x52/0x80 4,1316,531166622,-; ? usercopy_abort+0x6c/0x80 4,1317,531166630,-; ? asm_exc_invalid_op+0x1b/0x20 4,1318,531166643,-; ? usercopy_abort+0x6c/0x80 4,1319,531166652,-; __check_heap_object+0xe3/0x120 4,1320,531166661,-; check_heap_object+0x185/0x1d0 4,1321,531166670,-; __check_object_size.part.0+0x72/0x150 4,1322,531166679,-; __check_object_size+0x23/0x30 4,1323,531166688,-; bsg_transport_sg_io_fn+0x314/0x3b0

Package Linux Kernel
Published 2025-03-27
Last modified 2025-10-30
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

Affected versions

Linux kernel versions 6.3 and later are affected. Fixed in 6.6.81, 6.12.18, 6.13.6, 6.14 and their respective stable series.

Affected from
≥ 6.3
Fixed in
✓ 6.6.81 6.6.x ✓ 6.12.18 6.12.x ✓ 6.13.6 6.13.x ✓ 6.14

References

The following references provide additional information about CVE-2025-21873 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

4 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2025-21873?

    CVE-2025-21873 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.3 onward and has been patched in 6.6.81, 6.12.18, 6.13.6 and others. CVE-2025-21873 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2025-21873?

    CVE-2025-21873 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-2025-21873?

    Yes — CVE-2025-21873 has been patched. Fixed versions include 6.6.81, 6.12.18, 6.13.6 and others. If you are running Linux kernel 6.3 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2025-21873 actively exploited?

    No — CVE-2025-21873 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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