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NVD / CVE Program· CNA Linux

CVE-2022-50140: memstick/ms_block: Fix a memory leak

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.19% (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 16e07966638717416abf45393d6a80a5a1034429, 37958980eb4cd71ae594ace093c11b6a91e165e8, 39be95d1ff7b44c1e969af72ba9da7332dfcc1da.

Low priority for now. Upgrade to Linux Linux 16e07966638717416abf45393d6a80a5a1034429, 37958980eb4cd71ae594ace093c11b6a91e165e8, 39be95d1ff7b44c1e969af72ba9da7332dfcc1da 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/ms_block: Fix a memory leak 'erased_blocks_bitmap' is never freed. As it is allocated at the same time as 'used_blocks_bitmap', it is likely that it should be freed also at the same time. Add the corresponding bitmap_free() in msb_data_clear().

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 18, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 9th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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 you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • 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 kernel3.12 and later · before 4.14.291
  • linux linux kernel4.15 and later · before 4.19.256
  • linux linux kernel4.20 and later · before 5.4.211
  • linux linux kernel5.5 and later · before 5.10.137
  • linux linux kernel5.11 and later · before 5.15.61
  • linux linux kernel5.16 and later · before 5.18.18
  • linux linux kernel5.19 and later · before 5.19.2

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

    • 3.12affected
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before efd675246aec045507b9425c67b548cc2d782d8faffected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 37958980eb4cd71ae594ace093c11b6a91e165e8affected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 9d8b911fe3c3ed788c66edba7c90e32a4a7a5f53affected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 9260a154b3b5e387dbceec7c0ac441470646bc6faffected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 961d7d12080fe70847f944d656e36cd0dd0214baaffected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 16e07966638717416abf45393d6a80a5a1034429affected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 39be95d1ff7b44c1e969af72ba9da7332dfcc1daaffected · git
    • 0ab30494bc4f3bc1ea4659b7c5d97c5218554a63 and later · before 54eb7a55be6779c4d0c25eaf5056498a28595049affected · git
    • before 3.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.2-16.0.2-1

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-2022-50138Jun 18, 2025 · RDMA/qedr: Fix potential memory leak in __qedr_alloc_mr()
    22Monitor
  • ← EarlierCVE-2022-50139Jun 18, 2025 · usb: aspeed-vhub: Fix refcount leak bug in ast_vhub_init_desc()
    22Monitor
  • Later →CVE-2022-50141Jun 18, 2025 · mmc: sdhci-of-esdhc: Fix refcount leak in esdhc_signal_voltage_switch
    22Monitor

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 Linux16e07966638717416abf45393d6a80a5a1034429Vendor (CNA)
Linux Linux37958980eb4cd71ae594ace093c11b6a91e165e8Vendor (CNA)
Linux Linux39be95d1ff7b44c1e969af72ba9da7332dfcc1daVendor (CNA)
Linux Linux54eb7a55be6779c4d0c25eaf5056498a28595049Vendor (CNA)
Linux Linux9260a154b3b5e387dbceec7c0ac441470646bc6fVendor (CNA)
Linux Linux961d7d12080fe70847f944d656e36cd0dd0214baVendor (CNA)
Linux Linux9d8b911fe3c3ed788c66edba7c90e32a4a7a5f53Vendor (CNA)
Linux Linuxefd675246aec045507b9425c67b548cc2d782d8fVendor (CNA)
debian:linux6.0.2-1 · Debian:12Package registry (OSV)

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

Weakness class (CWE)

CWE-401 · Missing Release of Memory after Effective Lifetime

CVSS vector

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

nvd-primary

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 (7 more)

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

All records