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NVD / CVE Program· CNA Linux

CVE-2022-49749: i2c: designware: use casting of u64 in clock multiplication to avoid overflow

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 2f29d780bd691d20e89e5b35d5e6568607115e94, 9f36aae9e80e79b7a6d62227eaa96935166be9fe, c8c37bc514514999e62a17e95160ed9ebf75ca8d.

Low priority for now. Upgrade to Linux Linux 2f29d780bd691d20e89e5b35d5e6568607115e94, 9f36aae9e80e79b7a6d62227eaa96935166be9fe, c8c37bc514514999e62a17e95160ed9ebf75ca8d 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: i2c: designware: use casting of u64 in clock multiplication to avoid overflow In functions i2c_dw_scl_lcnt() and i2c_dw_scl_hcnt() may have overflow by depending on the values of the given parameters including the ic_clk. For example in our use case where ic_clk is larger than one million, multiplication of ic_clk * 4700 will result in 32 bit overflow. Add cast of u64 to the calculation to avoid multiplication overflow, and use the corresponding define for divide.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Mar 27, 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%

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.

Follow CVE-2022-49749

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 kernel3.2 and later · before 5.10.166
  • linux linux kernel5.11 and later · before 5.15.91
  • linux linux kernel5.16 and later · before 6.1.9
  • linux linux kernel6.2

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

    • 3.2affected
    • 2373f6b9744d5373b886f3ce1a985193cca0a356 and later · before ed173f77fd28a3e4fffc13b3f28687b9eba61157affected · git
    • 2373f6b9744d5373b886f3ce1a985193cca0a356 and later · before 2f29d780bd691d20e89e5b35d5e6568607115e94affected · git
    • 2373f6b9744d5373b886f3ce1a985193cca0a356 and later · before 9f36aae9e80e79b7a6d62227eaa96935166be9feaffected · git
    • 2373f6b9744d5373b886f3ce1a985193cca0a356 and later · before c8c37bc514514999e62a17e95160ed9ebf75ca8daffected · git
    • before 3.2not affected · semver
    • 5.10.166 and later · up to and including 5.10.*not affected · semver
    • 5.15.91 and later · up to and including 5.15.*not affected · semver
    • 6.1.9 and later · up to and including 6.1.*not affected · semver
    • 6.2 and laternot affected · original_commit_for_fix

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.11-16.1.11-1

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-2022-49747Mar 27, 2025 · erofs/zmap.c: Fix incorrect offset calculation
    22Monitor
  • ← EarlierCVE-2022-49748Mar 27, 2025 · perf/x86/amd: fix potential integer overflow on shift of a int
    22Monitor
  • Later →CVE-2022-49750Mar 27, 2025 · cpufreq: CPPC: Add u64 casts to avoid overflowing
    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 Linux2f29d780bd691d20e89e5b35d5e6568607115e94Vendor (CNA)
Linux Linux9f36aae9e80e79b7a6d62227eaa96935166be9feVendor (CNA)
Linux Linuxc8c37bc514514999e62a17e95160ed9ebf75ca8dVendor (CNA)
Linux Linuxed173f77fd28a3e4fffc13b3f28687b9eba61157Vendor (CNA)
debian:linux6.1.11-1 · 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.

  • CVE-2026-31633393 days apartrxrpc: Fix integer overflow in rxgk_verify_response()
    39Monitor
  • CVE-2026-31649393 days apartnet: stmmac: fix integer underflow in chain mode
    39Monitor
  • CVE-2026-31659393 days apartbatman-adv: reject oversized global TT response buffers
    39Monitor
  • CVE-2026-43341407 days apartnet/ipv6: ioam6: prevent schema length wraparound in trace fill
    39Monitor
  • CVE-2026-46039426 days apartrxgk: Fix potential integer overflow in length check
    39Monitor
  • CVE-2026-46325439 days apartRDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE
    39Monitor

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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (3 more)

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

All records