Medium Authentication exploit reference

CVE-2022-2503 — Linux Kernel LoadPin bypass via dm-verity table reload

Dm-verity is used for extending root-of-trust to root filesystems. LoadPin builds on this property to restrict module/firmware loads to just the trusted root filesystem. Device-mapper table reloads currently allow users with root privileges to switch out the target with an equivalent dm-linear target and bypass verification till reboot. This allows root to bypass LoadPin and can be used to load untrusted and unverified kernel modules and firmware, which implies arbitrary kernel execution and persistence for peripherals that do not verify firmware updates. We recommend upgrading past commit 4caae58406f8ceb741603eee460d79bacca9b1b5

Published Aug 12, 2022 · Updated Oct 14, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Google

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.4% (30-day exploitation probability)+5
Technical severity (medium)+3
CISA SSVC: exploitation "poc"+5

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.38%

ahead of 31% of scored CVEs · Oct 14, 2026

Affects

Linux

Linux Kernel

CVSS base

6.7

Medium · 4 source(s)

Prioritization reference: 6.9 provisional

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Proof of concept

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented patch — github.com (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux Kernel, Linux Kernel Linux Kernel).
Apply the fixed version or the patch documented under Remediation.
Search available logs for exploit probes matching the vulnerability class (authentication), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux Kernel	< 5.19	Vulnerable	NIST National Vulnerability Database
Linux Kernel	Linux Kernel	< 4caae58406f8ceb741603eee460d79bacca9b1b5	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

High

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
6.9	CVSS 3.1	Medium	0.6	5.8	cve-coordination@google.com via NIST National Vulnerability Database
6.9	CVSS 3.1	Medium	—	—	Google via CVE Program (cve.org) e CISA ADP
6.7	CVSS 3.1	Medium	0.8	5.9	nvd@nist.gov via NIST National Vulnerability Database
6.7	CVSS 3.1	Medium	—	—	GitHub, Inc. via GitHub Security Advisories

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 6.9 (cve-coordination@google.com via NIST National Vulnerability Database) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-287 · Improper Authentication

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.38%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
Review authentication logs: logins without MFA, anomalous sessions and recently created accounts.

endpoint telemetry (EDR)authentication logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux kernel/linux kernel
Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 14, 2026
Fix documented
Oct 14, 2026 · NIST National Vulnerability Database
Affected products added · linux/linux kernel
Oct 14, 2026 · NIST National Vulnerability Database
CVSS changed · 6.7
Oct 14, 2026 · NIST National Vulnerability Database
Source status changed · → Modified
Oct 14, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 14, 2026 · Alertas do Telegram
2022
CVE published
Aug 12, 2022 · Google

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 14, 2026 – Oct 14, 2026
1× Official description updated · Oct 14, 2026 – Oct 14, 2026

References

5 on the record

github.com/google/security-research/security/advisories/GHSA-6vq3-w69p-w63m
Exploit, Patch, Third Party Advisory, NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2022-2503
GitHub Security Advisories
github.com/advisories/GHSA-j7xr-c5x7-xr2p
GitHub Security Advisories
security.netapp.com/advisory/ntap-20230214-0005/
NIST National Vulnerability Database
cert-portal.siemens.com/productcert/html/ssa-794697.html
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Authentication
same class

CWE-287
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-98164 KVM: x86/mmu: Check write tracking in all address spaces 16d
High CVE-2026-98163 cgroup: Avoid iteration of dying tasks with zero refcount 19d
Medium CVE-2026-98162 smb/server: fix tree connection leak in smb2_tree_connect() 20d
High CVE-2026-98156 drm/virtio: use the DMA API for resource backing on Xen 20d
Medium CVE-2026-98159 wifi: mt76: mt7921: validate CLC firmware records 20d
Medium CVE-2026-98137 ntfs: treat any nonzero dio zero-range return as an error 20d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2022-2503 is "Linux Kernel LoadPin bypass via dm-verity table reload", rated Medium. It affects Linux Kernel (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.7 describes technical severity. EPSS 0.38% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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