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NVD / CVE Program· CNA Linux

CVE-2025-22020: memstick: rtsx_usb_ms: Fix slab-use-after-free in rtsx_usb_ms_drv_remove

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 0067cb7d7e7c277e91a0887a3c24e71462379469, 31f0eaed6914333f42501fc7e0f6830879f5ef2d, 4676741a3464b300b486e70585c3c9b692be1632; Azure Linux 3.0 ARM 6.6.92.2-1; Azure Linux 3.0 x64 6.6.92.2-1.

Low priority for now. Upgrade to Linux Linux 0067cb7d7e7c277e91a0887a3c24e71462379469, 31f0eaed6914333f42501fc7e0f6830879f5ef2d, 4676741a3464b300b486e70585c3c9b692be1632; Azure Linux 3.0 ARM 6.6.92.2-1; Azure Linux 3.0 x64 6.6.92.2-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: memstick: rtsx_usb_ms: Fix slab-use-after-free in rtsx_usb_ms_drv_remove This fixes the following crash: ================================================================== BUG: KASAN: slab-use-after-free in rtsx_usb_ms_poll_card+0x159/0x200 [rtsx_usb_ms] Read of size 8 at addr ffff888136335380 by task kworker/6:0/140241 CPU: 6 UID: 0 PID: 140241 Comm: kworker/6:0 Kdump: loaded Tainted: G E 6.14.0-rc6+ #1 Tainted: [E]=UNSIGNED_MODULE Hardware name: LENOVO 30FNA1V7CW/1057, BIOS S0EKT54A 07/01/2024 Workqueue: events rtsx_usb_ms_poll_card [rtsx_usb_ms] Call Trace: <TASK> dump_stack_lvl+0x51/0x70 print_address_description.constprop.0+0x27/0x320 ? rtsx_usb_ms_poll_card+0x159/0x200 [rtsx_usb_ms] print_report+0x3e/0x70 kasan_report+0xab/0xe0 ? rtsx_usb_ms_poll_card+0x159/0x200 [rtsx_usb_ms] rtsx_usb_ms_poll_card+0x159/0x200 [rtsx_usb_ms] ? __pfx_rtsx_usb_ms_poll_card+0x10/0x10 [rtsx_usb_ms] ? __pfx___schedule+0x10/0x10 ? kick_pool+0x3b/0x270 process_one_work+0x357/0x660 worker_thread+0x390/0x4c0 ? __pfx_worker_thread+0x10/0x10 kthread+0x190/0x1d0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2d/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 161446: kasan_save_stack+0x20/0x40 kasan_save_track+0x10/0x30 __kasan_kmalloc+0x7b/0x90 __kmalloc_noprof+0x1a7/0x470 memstick_alloc_host+0x1f/0xe0 [memstick] rtsx_usb_ms_drv_probe+0x47/0x320 [rtsx_usb_ms] platform_probe+0x60/0xe0 call_driver_probe+0x35/0x120 really_probe+0x123/0x410 __driver_probe_device+0xc7/0x1e0 driver_probe_device+0x49/0xf0 __device_attach_driver+0xc6/0x160 bus_for_each_drv+0xe4/0x160 __device_attach+0x13a/0x2b0 bus_probe_device+0xbd/0xd0 device_add+0x4a5/0x760 platform_device_add+0x189/0x370 mfd_add_device+0x587/0x5e0 mfd_add_devices+0xb1/0x130 rtsx_usb_probe+0x28e/0x2e0 [rtsx_usb] usb_probe_interface+0x15c/0x460 call_driver_probe+0x35/0x120 really_probe+0x123/0x410 __driver_probe_device+0xc7/0x1e0 driver_probe_device+0x49/0xf0 __device_attach_driver+0xc6/0x160 bus_for_each_drv+0xe4/0x160 __device_attach+0x13a/0x2b0 rebind_marked_interfaces.isra.0+0xcc/0x110 usb_reset_device+0x352/0x410 usbdev_do_ioctl+0xe5c/0x1860 usbdev_ioctl+0xa/0x20 __x64_sys_ioctl+0xc5/0xf0 do_syscall_64+0x59/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e Freed by task 161506: kasan_save_stack+0x20/0x40 kasan_save_track+0x10/0x30 kasan_save_free_info+0x36/0x60 __kasan_slab_free+0x34/0x50 kfree+0x1fd/0x3b0 device_release+0x56/0xf0 kobject_cleanup+0x73/0x1c0 rtsx_usb_ms_drv_remove+0x13d/0x220 [rtsx_usb_ms] platform_remove+0x2f/0x50 device_release_driver_internal+0x24b/0x2e0 bus_remove_device+0x124/0x1d0 device_del+0x239/0x530 platform_device_del.part.0+0x19/0xe0 platform_device_unregister+0x1c/0x40 mfd_remove_devices_fn+0x167/0x170 device_for_each_child_reverse+0xc9/0x130 mfd_remove_devices+0x6e/0xa0 rtsx_usb_disconnect+0x2e/0xd0 [rtsx_usb] usb_unbind_interface+0xf3/0x3f0 device_release_driver_internal+0x24b/0x2e0 proc_disconnect_claim+0x13d/0x220 usbdev_do_ioctl+0xb5e/0x1860 usbdev_ioctl+0xa/0x20 __x64_sys_ioctl+0xc5/0xf0 do_syscall_64+0x59/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e Last potentially related work creation: kasan_save_stack+0x20/0x40 kasan_record_aux_stack+0x85/0x90 insert_work+0x29/0x100 __queue_work+0x34a/0x540 call_timer_fn+0x2a/0x160 expire_timers+0x5f/0x1f0 __run_timer_base.part.0+0x1b6/0x1e0 run_timer_softirq+0x8b/0xe0 handle_softirqs+0xf9/0x360 __irq_exit_rcu+0x114/0x130 sysvec_apic_timer_interrupt+0x72/0x90 asm_sysvec_apic_timer_interrupt+0x16/0x20 Second to last potentially related work creation: kasan_save_stack+0x20/0x40 kasan_record_aux_stack+0x85/0x90 insert_work+0x29/0x100 __queue_work+0x34a/0x540 call_timer_fn+0x2a/0x160 expire_timers+0x5f/0x1f0 __run_timer_base.part.0+0x1b6/0x1e0 run_timer_softirq+0x8b/0xe0 handle_softirqs+0xf9/0x ---truncated---

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Apr 16, 2025
Updated
Aug 5, 2026
EPSS
0.2% · 11th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.8
CNA · Linux
7.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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  • when it enters CISA KEV
  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.0 and later · before 5.4.292
  • linux linux kernel5.5 and later · before 5.10.236
  • linux linux kernel5.11 and later · before 5.15.180
  • linux linux kernel5.16 and later · before 6.1.133
  • linux linux kernel6.2 and later · before 6.6.86
  • linux linux kernel6.7 and later · before 6.12.22
  • linux linux kernel6.13 and later · before 6.13.10
  • linux linux kernel6.14 and later · before 6.14.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.0affected
    • 6827ca573c03385439fdfc8b512d556dc7c54fc9 and later · before 914c5e5bfceb9878f3056eaf4d1c88f2cbe0a185affected · git
    • 6827ca573c03385439fdfc8b512d556dc7c54fc9 and later · before 9dfaf4d723c62bda8d9d1340e2e78acf0c190439affected · git
    • 6827ca573c03385439fdfc8b512d556dc7c54fc9 and later · before 31f0eaed6914333f42501fc7e0f6830879f5ef2daffected · git
    • 6827ca573c03385439fdfc8b512d556dc7c54fc9 and later · before 52d942a5302eefb3b7a3bfee310a5a33feeedc21affected · git
    • 6827ca573c03385439fdfc8b512d556dc7c54fc9 and later · before 6186fb2cd36317277a8423687982140a7f3f7841affected · git
    • 6827ca573c03385439fdfc8b512d556dc7c54fc9 and later · before b094e8e3988e02e8cef7a756c8d2cea9c12509abaffected · git
    • 6827ca573c03385439fdfc8b512d556dc7c54fc9 and later · before 0067cb7d7e7c277e91a0887a3c24e71462379469affected · git
    • 6827ca573c03385439fdfc8b512d556dc7c54fc9 and later · before 75123adf204f997e11bbddee48408c284f51c050affected · git
    • 6827ca573c03385439fdfc8b512d556dc7c54fc9 and later · before 4676741a3464b300b486e70585c3c9b692be1632affected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-55.25.1.el10_06.12.0-55.25.1.el10_0
AlmaLinux:10kernel-docbefore 6.12.0-55.25.1.el10_06.12.0-55.25.1.el10_0
AlmaLinux:8bpftoolbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.66.1.el8_104.18.0-553.66.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.66.1.rt7.407.el8_104.18.0-553.66.1.rt7.407.el8_10

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-58092Apr 16, 2025 · nfsd: fix legacy client tracking initialization
    22Monitor
  • ← EarlierCVE-2025-22019Apr 16, 2025 · bcachefs: bch2_ioctl_subvolume_destroy() fixes
    22Monitor
  • Later →CVE-2025-22022Apr 16, 2025 · usb: xhci: Apply the link chain quirk on NEC isoc endpoints
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0067cb7d7e7c277e91a0887a3c24e71462379469Vendor (CNA)
Linux Linux31f0eaed6914333f42501fc7e0f6830879f5ef2dVendor (CNA)
Linux Linux4676741a3464b300b486e70585c3c9b692be1632Vendor (CNA)
Linux Linux52d942a5302eefb3b7a3bfee310a5a33feeedc21Vendor (CNA)
Linux Linux6186fb2cd36317277a8423687982140a7f3f7841Vendor (CNA)
Linux Linux75123adf204f997e11bbddee48408c284f51c050Vendor (CNA)
Linux Linux914c5e5bfceb9878f3056eaf4d1c88f2cbe0a185Vendor (CNA)
Linux Linux9dfaf4d723c62bda8d9d1340e2e78acf0c190439Vendor (CNA)
Linux Linuxb094e8e3988e02e8cef7a756c8d2cea9c12509abVendor (CNA)
Azure Linux 3.0 ARM6.6.92.2-1 · kernelMicrosoft (MSRC)
Azure Linux 3.0 x646.6.92.2-1 · kernelMicrosoft (MSRC)
almalinux:kernel5.14.0-570.32.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-570.32.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-570.32.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-570.32.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-570.32.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-570.32.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-570.32.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-570.32.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-570.32.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-570.32.1.el9_6 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-abi-stablelists6.12.0-55.25.1.el10_0 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-doc6.12.0-55.25.1.el10_0 · AlmaLinux:10Package registry (OSV)
debian:linux6.1.133-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:6.12.0-55.25.1.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:kernel-64k-debug-devel0:6.12.0-55.25.1.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:kernel-64k-debug-devel-matched0:6.12.0-55.25.1.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:kernel-64k-debuginfo0:6.12.0-55.25.1.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:kernel-64k-devel0:6.12.0-55.25.1.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:kernel-64k-devel-matched0:6.12.0-55.25.1.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)

+20

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

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

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
free(dev->buf);/* ... another thread is still running ... */process(dev->buf);

Fixed

c
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (10 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records