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NVD / CVE Program· CNA Linux

CVE-2022-49727: ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg

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 034246122f5c5e2e2a0b9fe04e24517920e9beb1, 0e818d433fc2718fe4da044ffca7431812a7e04e, 27a37755ceb401111ded76810359d3adc4b268a1.

Low priority for now. Upgrade to Linux Linux 034246122f5c5e2e2a0b9fe04e24517920e9beb1, 0e818d433fc2718fe4da044ffca7431812a7e04e, 27a37755ceb401111ded76810359d3adc4b268a1 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: ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg When len >= INT_MAX - transhdrlen, ulen = len + transhdrlen will be overflow. To fix, we can follow what udpv6 does and subtract the transhdrlen from the max.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 20th 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.

Follow CVE-2022-49727

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 kernelbefore 4.9.320
  • linux linux kernel4.10 and later · before 4.14.285
  • linux linux kernel4.15 and later · before 4.19.249
  • linux linux kernel4.20 and later · before 5.4.200
  • linux linux kernel5.5 and later · before 5.10.124
  • linux linux kernel5.11 and later · before 5.15.49
  • linux linux kernel5.16 and later · before 5.18.6
  • 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

    • 3.5affected
    • a32e0eec7042b21ccb52896cf715e3e2641fed93 and later · before 2cf73c7cb6125083408d77f43d0e84d86aed0000affected · git
    • a32e0eec7042b21ccb52896cf715e3e2641fed93 and later · before 0e818d433fc2718fe4da044ffca7431812a7e04eaffected · git
    • a32e0eec7042b21ccb52896cf715e3e2641fed93 and later · before 6c4e3486d21173d60925ef52e512cae727b43d30affected · git
    • a32e0eec7042b21ccb52896cf715e3e2641fed93 and later · before 2f42389d270f2304c8855b0b63498a5a4d0c053daffected · git
    • a32e0eec7042b21ccb52896cf715e3e2641fed93 and later · before b8879ca1fd7348b4d5db7db86dcb97f60c73d751affected · git
    • a32e0eec7042b21ccb52896cf715e3e2641fed93 and later · before 27a37755ceb401111ded76810359d3adc4b268a1affected · git
    • a32e0eec7042b21ccb52896cf715e3e2641fed93 and later · before 034246122f5c5e2e2a0b9fe04e24517920e9beb1affected · git
    • a32e0eec7042b21ccb52896cf715e3e2641fed93 and later · before f638a84afef3dfe10554c51820c16e39a278c915affected · git
    • before 3.5not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.14-15.18.14-1

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-2022-49725Feb 26, 2025 · i40e: Fix call trace in setup_tx_descriptors
    22Monitor
  • ← EarlierCVE-2022-49726Feb 26, 2025 · clocksource: hyper-v: unexport __init-annotated hv_init_clocksource()
    22Monitor
  • Later →CVE-2022-49728Feb 26, 2025 · ipv6: Fix signed integer overflow in __ip6_append_data
    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 Linux034246122f5c5e2e2a0b9fe04e24517920e9beb1Vendor (CNA)
Linux Linux0e818d433fc2718fe4da044ffca7431812a7e04eVendor (CNA)
Linux Linux27a37755ceb401111ded76810359d3adc4b268a1Vendor (CNA)
Linux Linux2cf73c7cb6125083408d77f43d0e84d86aed0000Vendor (CNA)
Linux Linux2f42389d270f2304c8855b0b63498a5a4d0c053dVendor (CNA)
Linux Linux6c4e3486d21173d60925ef52e512cae727b43d30Vendor (CNA)
Linux Linuxb8879ca1fd7348b4d5db7db86dcb97f60c73d751Vendor (CNA)
Linux Linuxf638a84afef3dfe10554c51820c16e39a278c915Vendor (CNA)
debian:linux5.18.14-1 · 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-2026-31633422 days apartrxrpc: Fix integer overflow in rxgk_verify_response()
    39Monitor
  • CVE-2026-31649422 days apartnet: stmmac: fix integer underflow in chain mode
    39Monitor
  • CVE-2026-31659422 days apartbatman-adv: reject oversized global TT response buffers
    39Monitor
  • CVE-2026-43341436 days apartnet/ipv6: ioam6: prevent schema length wraparound in trace fill
    39Monitor
  • CVE-2026-46039455 days apartrxgk: Fix potential integer overflow in length check
    39Monitor
  • CVE-2026-46325468 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 (7 more)

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

All records