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NVD / CVE Program· CNA Linux

CVE-2022-49853: net: macvlan: fix memory leaks of macvlan_common_newlink

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: 0.22% (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 21d3a8b6a1e39e7529ce9de07316ee13a63f305b, 23569b5652ee8e8e55a12f7835f59af6f3cefc30, 685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e.

Low priority for now. Upgrade to Linux Linux 21d3a8b6a1e39e7529ce9de07316ee13a63f305b, 23569b5652ee8e8e55a12f7835f59af6f3cefc30, 685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e 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: net: macvlan: fix memory leaks of macvlan_common_newlink kmemleak reports memory leaks in macvlan_common_newlink, as follows: ip link add link eth0 name .. type macvlan mode source macaddr add <MAC-ADDR> kmemleak reports: unreferenced object 0xffff8880109bb140 (size 64): comm "ip", pid 284, jiffies 4294986150 (age 430.108s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 b8 aa 5a 12 80 88 ff ff ..........Z..... 80 1b fa 0d 80 88 ff ff 1e ff ac af c7 c1 6b 6b ..............kk backtrace: [<ffffffff813e06a7>] kmem_cache_alloc_trace+0x1c7/0x300 [<ffffffff81b66025>] macvlan_hash_add_source+0x45/0xc0 [<ffffffff81b66a67>] macvlan_changelink_sources+0xd7/0x170 [<ffffffff81b6775c>] macvlan_common_newlink+0x38c/0x5a0 [<ffffffff81b6797e>] macvlan_newlink+0xe/0x20 [<ffffffff81d97f8f>] __rtnl_newlink+0x7af/0xa50 [<ffffffff81d98278>] rtnl_newlink+0x48/0x70 ... In the scenario where the macvlan mode is configured as 'source', macvlan_changelink_sources() will be execured to reconfigure list of remote source mac addresses, at the same time, if register_netdevice() return an error, the resource generated by macvlan_changelink_sources() is not cleaned up. Using this patch, in the case of an error, it will execute macvlan_flush_sources() to ensure that the resource is cleaned up.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 1, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 13th 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 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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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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 kernel4.9 and later · before 4.9.334
  • linux linux kernel4.10 and later · before 4.14.300
  • linux linux kernel4.15 and later · before 4.19.267
  • linux linux kernel4.20 and later · before 5.4.225
  • linux linux kernel5.5 and later · before 5.10.155
  • linux linux kernel5.11 and later · before 5.15.79
  • linux linux kernel5.16 and later · before 6.0.9
  • linux linux kernel6.1

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

    • 4.9affected
    • aa5fd0fb77486b8a6764ead8627baa14790e4280 and later · before 9f288e338be206713d79b29144c27fca4503c39baffected · git
    • aa5fd0fb77486b8a6764ead8627baa14790e4280 and later · before 21d3a8b6a1e39e7529ce9de07316ee13a63f305baffected · git
    • aa5fd0fb77486b8a6764ead8627baa14790e4280 and later · before a81b44d1df1f07f00c0dcc0a0b3d2fa24a46289eaffected · git
    • aa5fd0fb77486b8a6764ead8627baa14790e4280 and later · before 685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2eaffected · git
    • aa5fd0fb77486b8a6764ead8627baa14790e4280 and later · before 956e0216a19994443c90ba2ea6b0b284c9c4f9cbaffected · git
    • aa5fd0fb77486b8a6764ead8627baa14790e4280 and later · before a8d67367ab33604326cc37ab44fd1801bf5691baaffected · git
    • aa5fd0fb77486b8a6764ead8627baa14790e4280 and later · before 9ea003c4671b2fc455320ecf6d4a43b0a3c1878aaffected · git
    • aa5fd0fb77486b8a6764ead8627baa14790e4280 and later · before 23569b5652ee8e8e55a12f7835f59af6f3cefc30affected · git
    • before 4.9not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.10-16.0.10-1
Red Hat:enterprise_linux:8::baseosbpftoolbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseosbpftool-debuginfobefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernelbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-abi-stablelistsbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-corebefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debugbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debug-corebefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debug-debuginfobefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debug-develbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debug-modulesbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debug-modules-extrabefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debuginfobefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-aarch64before 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-ppc64lebefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-s390xbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-x86_64before 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-develbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-docbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-modulesbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-modules-extrabefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-toolsbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-tools-debuginfobefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8
Red Hat:enterprise_linux:8::baseoskernel-tools-libsbefore 0:4.18.0-477.21.1.el8_80:4.18.0-477.21.1.el8_8

+11

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-2022-49851May 1, 2025 · riscv: fix reserved memory setup
    28Monitor
  • ← EarlierCVE-2022-49852May 1, 2025 · riscv: process: fix kernel info leakage
    28Monitor
  • Later →CVE-2022-49854May 1, 2025 · mctp: Fix an error handling path in mctp_init()
    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 Linux21d3a8b6a1e39e7529ce9de07316ee13a63f305bVendor (CNA)
Linux Linux23569b5652ee8e8e55a12f7835f59af6f3cefc30Vendor (CNA)
Linux Linux685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2eVendor (CNA)
Linux Linux956e0216a19994443c90ba2ea6b0b284c9c4f9cbVendor (CNA)
Linux Linux9ea003c4671b2fc455320ecf6d4a43b0a3c1878aVendor (CNA)
Linux Linux9f288e338be206713d79b29144c27fca4503c39bVendor (CNA)
Linux Linuxa81b44d1df1f07f00c0dcc0a0b3d2fa24a46289eVendor (CNA)
Linux Linuxa8d67367ab33604326cc37ab44fd1801bf5691baVendor (CNA)
debian:linux6.0.10-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules-extra0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debuginfo0:4.18.0-477.21.1.el8_8 · Red Hat:enterprise_linux:8::baseosPackage 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 (7 more)

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

All records