CVE-2022-49451· NVD / CVE Program· CNA Linux

firmware: arm_scmi: Fix list protocols enumeration in the base protocol

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: 0.29% (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 1052f22e127d0c34c3387bb389424ba1c61491ff, 2ccfcd7a09c826516edcfe464b05071961aada3f, 444a2d27fe9867d0da4b28fc45b793f32e099ab8.
Severity is disputed: the assigning authority (CNA) scores it 8.4, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 1052f22e127d0c34c3387bb389424ba1c61491ff, 2ccfcd7a09c826516edcfe464b05071961aada3f, 444a2d27fe9867d0da4b28fc45b793f32e099ab8 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

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix list protocols enumeration in the base protocol While enumerating protocols implemented by the SCMI platform using BASE_DISCOVER_LIST_PROTOCOLS, the number of returned protocols is currently validated in an improper way since the check employs a sum between unsigned integers that could overflow and cause the check itself to be silently bypassed if the returned value 'loop_num_ret' is big enough. Fix the validation avoiding the addition.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Published: Feb 26, 2025
Updated: Aug 5, 2026
EPSS: 0.3% · 21th percentile
CWE: CWE-190

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 5.5
CNA · Linux: 8.4; 2.9 point gap

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

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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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_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 4.19.247
linux linux kernel4.20 and later · before 5.4.198
linux linux kernel5.5 and later · before 5.10.121
linux linux kernel5.11 and later · before 5.15.46
linux linux kernel5.16 and later · before 5.17.14
linux linux kernel5.18 and later · before 5.18.3

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
- b6f20ff8bd94ad34032804a60bab5ee56752007e and later · before 444a2d27fe9867d0da4b28fc45b793f32e099ab8affected · git
- b6f20ff8bd94ad34032804a60bab5ee56752007e and later · before b0e4bafac8963c2d85ee18d3d01f393735acceecaffected · git
- b6f20ff8bd94ad34032804a60bab5ee56752007e and later · before 1052f22e127d0c34c3387bb389424ba1c61491ffaffected · git
- b6f20ff8bd94ad34032804a60bab5ee56752007e and later · before 98342148a8cd242855d7e257f298c966c96dba9faffected · git
- b6f20ff8bd94ad34032804a60bab5ee56752007e and later · before 6e7978695f4a6cbd83616b5a702b77fa2087b247affected · git
- b6f20ff8bd94ad34032804a60bab5ee56752007e and later · before 2ccfcd7a09c826516edcfe464b05071961aada3faffected · git
- b6f20ff8bd94ad34032804a60bab5ee56752007e and later · before 8009120e0354a67068e920eb10dce532391361d0affected · git
- before 4.17not affected · semver
- 4.19.247 and later · up to and including 4.19.*not affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 5.18.5-1	5.18.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

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CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
83Now
CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV
77This week
CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV
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CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV
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Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
Linux Linux	1052f22e127d0c34c3387bb389424ba1c61491ff	Vendor (CNA)
Linux Linux	2ccfcd7a09c826516edcfe464b05071961aada3f	Vendor (CNA)
Linux Linux	444a2d27fe9867d0da4b28fc45b793f32e099ab8	Vendor (CNA)
Linux Linux	6e7978695f4a6cbd83616b5a702b77fa2087b247	Vendor (CNA)
Linux Linux	8009120e0354a67068e920eb10dce532391361d0	Vendor (CNA)
Linux Linux	98342148a8cd242855d7e257f298c966c96dba9f	Vendor (CNA)
Linux Linux	b0e4bafac8963c2d85ee18d3d01f393735acceec	Vendor (CNA)
debian:linux	5.18.5-1 · Debian:12	Package 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.

CVE-2026-31633422 days apartrxrpc: Fix integer overflow in rxgk_verify_response()
39Monitor
CVE-2026-31649422 days apartnet: stmmac: fix integer underflow in chain mode
39Monitor
CVE-2026-46039455 days apartrxgk: Fix potential integer overflow in length check
39Monitor
CVE-2026-46198456 days apartbatman-adv: fix integer overflow on buff_pos
35Monitor
CVE-2026-64313514 days apartcrypto: ecc - Fix carry overflow in vli multiplication
35Monitor
CVE-2022-49030128 days apartlibbpf: Handle size overflow for ringbuf mmap
31Monitor

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-190 · Integer Overflow or Wraparound

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.

Attack patterns (CAPEC)

Forced Integer OverflowCAPEC-92likelihood: High · High

ATT&CK techniques

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Change log

Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

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

References

git.kernel.org/stable/c/1052f22e127d0c34c3387bb389424ba1c61491ff

Show all references (6 more)

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

All records