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NVD / CVE Program· CNA Linux

CVE-2022-50074: apparmor: Fix memleak in aa_simple_write_to_buffer()

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 417ea9fe972d2654a268ad66e89c8fcae67017c3, 6500eb3a48ac221051b1791818a1ac74744ef617, 6583edbf459de2e06b9759f264c0ae27e452b97a.

Low priority for now. Upgrade to Linux Linux 417ea9fe972d2654a268ad66e89c8fcae67017c3, 6500eb3a48ac221051b1791818a1ac74744ef617, 6583edbf459de2e06b9759f264c0ae27e452b97a 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: apparmor: Fix memleak in aa_simple_write_to_buffer() When copy_from_user failed, the memory is freed by kvfree. however the management struct and data blob are allocated independently, so only kvfree(data) cause a memleak issue here. Use aa_put_loaddata(data) to fix this issue.

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 kernel4.17 and later · before 4.19.256
  • linux linux kernel4.20 and later · before 5.4.211
  • linux linux kernel5.5 and later · before 5.10.138
  • linux linux kernel5.11 and later · before 5.15.63
  • linux linux kernel5.16 and later · before 5.19.4

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

    • 4.17affected
    • a6a52579e52b55448326db88bd9a5740e7c1a037 and later · before 6500eb3a48ac221051b1791818a1ac74744ef617affected · git
    • a6a52579e52b55448326db88bd9a5740e7c1a037 and later · before 7db182a2ebeefded86fea542fcc5d6a68bb77f58affected · git
    • a6a52579e52b55448326db88bd9a5740e7c1a037 and later · before 8aab4295582eb397a125d2788b829fa62b88dbf7affected · git
    • a6a52579e52b55448326db88bd9a5740e7c1a037 and later · before bf7ebebce2c25071c719fd8a2f1307e0c243c2d7affected · git
    • a6a52579e52b55448326db88bd9a5740e7c1a037 and later · before 6583edbf459de2e06b9759f264c0ae27e452b97aaffected · git
    • a6a52579e52b55448326db88bd9a5740e7c1a037 and later · before 417ea9fe972d2654a268ad66e89c8fcae67017c3affected · git
    • before 4.17not affected · semver
    • 4.19.256 and later · up to and including 4.19.*not affected · semver
    • 5.4.211 and later · up to and including 5.4.*not 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-2022-50072Jun 18, 2025 · NFSv4/pnfs: Fix a use-after-free bug in open
    31Monitor
  • ← EarlierCVE-2022-50073Jun 18, 2025 · net: tap: NULL pointer derefence in dev_parse_header_protocol when skb->dev is null
    22Monitor
  • Later →CVE-2022-50075Jun 18, 2025 · tracing/eprobes: Have event probes be consistent with kprobes and uprobes
    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 Linux417ea9fe972d2654a268ad66e89c8fcae67017c3Vendor (CNA)
Linux Linux6500eb3a48ac221051b1791818a1ac74744ef617Vendor (CNA)
Linux Linux6583edbf459de2e06b9759f264c0ae27e452b97aVendor (CNA)
Linux Linux7db182a2ebeefded86fea542fcc5d6a68bb77f58Vendor (CNA)
Linux Linux8aab4295582eb397a125d2788b829fa62b88dbf7Vendor (CNA)
Linux Linuxbf7ebebce2c25071c719fd8a2f1307e0c243c2d7Vendor (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.

No history yet (it accumulates with the daily EPSS job).

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 (5 more)

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

All records