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NVD / CVE Program· CNA Linux

CVE-2022-49350: net: mdio: unexport __init-annotated mdio_bus_init()

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: 0.28% (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 35b42dce619701f1300fb8498dae82c9bb1f0263, 5534bcd7c40299862237c4a8fd9c5031b3db1538, 59fa94cddf9eef8d8dae587373eed8b8f4eb11d7.

Low priority for now. Upgrade to Linux Linux 35b42dce619701f1300fb8498dae82c9bb1f0263, 5534bcd7c40299862237c4a8fd9c5031b3db1538, 59fa94cddf9eef8d8dae587373eed8b8f4eb11d7 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: mdio: unexport __init-annotated mdio_bus_init() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic. modpost used to detect it, but it has been broken for a decade. Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds. There are two ways to fix it: - Remove __init - Remove EXPORT_SYMBOL I chose the latter for this case because the only in-tree call-site, drivers/net/phy/phy_device.c is never compiled as modular. (CONFIG_PHYLIB is boolean)

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 21th 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%

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

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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 kernel4.12 and later · before 4.14.283
  • linux linux kernel4.15 and later · before 4.19.247
  • linux linux kernel4.20 and later · before 5.4.198
  • linux linux kernel5.5 and later · before 5.10.122
  • linux linux kernel5.11 and later · before 5.15.47
  • linux linux kernel5.16 and later · before 5.17.15
  • linux linux kernel5.18 and later · before 5.18.4
  • linux linux kernel5.19

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

    • 4.12affected
    • 90eff9096c01ba90cdae504a6b95ee87fe2556a3 and later · before ab64ec2c75683f30ccde9eaaf0761002f901aa12affected · git
    • 90eff9096c01ba90cdae504a6b95ee87fe2556a3 and later · before 5534bcd7c40299862237c4a8fd9c5031b3db1538affected · git
    • 90eff9096c01ba90cdae504a6b95ee87fe2556a3 and later · before 6a90a44d53428a3bf01bd80df9ba78b19959270caffected · git
    • 90eff9096c01ba90cdae504a6b95ee87fe2556a3 and later · before 7759c3222815b945a94b212bc0c6cdec475cfec2affected · git
    • 90eff9096c01ba90cdae504a6b95ee87fe2556a3 and later · before 59fa94cddf9eef8d8dae587373eed8b8f4eb11d7affected · git
    • 90eff9096c01ba90cdae504a6b95ee87fe2556a3 and later · before f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3affected · git
    • 90eff9096c01ba90cdae504a6b95ee87fe2556a3 and later · before f2f0f8c18b60ca64ff50892ed899cf1c77864755affected · git
    • 90eff9096c01ba90cdae504a6b95ee87fe2556a3 and later · before 35b42dce619701f1300fb8498dae82c9bb1f0263affected · git
    • before 4.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.5-15.18.5-1
Red Hat:enterprise_linux:9::appstreambpftool-debuginfobefore 0:7.3.0-427.13.1.el9_40:7.3.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-debug-debuginfobefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-debug-develbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-debug-devel-matchedbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-debuginfobefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-develbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-64k-devel-matchedbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debug-debuginfobefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debug-develbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debug-devel-matchedbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debuginfobefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-aarch64before 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-ppc64lebefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-s390xbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-x86_64before 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-develbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-devel-matchedbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-docbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-rt-debug-debuginfobefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-rt-debuginfobefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-tools-debuginfobefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-zfcpdump-debuginfobefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4
Red Hat:enterprise_linux:9::appstreamkernel-zfcpdump-develbefore 0:5.14.0-427.13.1.el9_40:5.14.0-427.13.1.el9_4

+55

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-2022-49348Feb 26, 2025 · ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state
    22Monitor
  • ← EarlierCVE-2022-49349Feb 26, 2025 · ext4: fix use-after-free in ext4_rename_dir_prepare
    31Monitor
  • Later →CVE-2022-49351Feb 26, 2025 · net: altera: Fix refcount leak in altera_tse_mdio_create
    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 Linux35b42dce619701f1300fb8498dae82c9bb1f0263Vendor (CNA)
Linux Linux5534bcd7c40299862237c4a8fd9c5031b3db1538Vendor (CNA)
Linux Linux59fa94cddf9eef8d8dae587373eed8b8f4eb11d7Vendor (CNA)
Linux Linux6a90a44d53428a3bf01bd80df9ba78b19959270cVendor (CNA)
Linux Linux7759c3222815b945a94b212bc0c6cdec475cfec2Vendor (CNA)
Linux Linuxab64ec2c75683f30ccde9eaaf0761002f901aa12Vendor (CNA)
Linux Linuxf2f0f8c18b60ca64ff50892ed899cf1c77864755Vendor (CNA)
Linux Linuxf5c68137f1191ba3fcf6260ec71b30be2e2bf4c3Vendor (CNA)
debian:linux5.18.5-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:7.3.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-427.13.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage 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.

  • CVE-2024-5030299 days apartHID: core: zero-initialize the report bufferKEV
    52Plan
  • CVE-2026-52989483 days apartnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
    39Monitor
  • CVE-2024-47685128 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()
    36Monitor
  • CVE-2026-53225484 days apartsctp: fix uninit-value in __sctp_rcv_asconf_lookup()
    36Monitor
  • CVE-2026-53170484 days apartaccel/ethosu: reject DMA commands with uninitialized length
    35Monitor
  • CVE-2026-43139434 days apartxfrm6: fix uninitialized saddr in xfrm6_get_saddr()
    34Monitor

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-908 · Use of Uninitialized Resource

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