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CVE-2026-4531

A weakness has been identified in Free5GC 4.1.0. Affected is the function HandleRegistrationComplete of the file internal/gmm/handler.go of the component AMF. Executing a manipulation can lead to denial of service. The attack may be performed from remote. This patch is called 52e9386401ce56ea773c5aa587d4cdf7d53da799. It is best practice to apply a patch to resolve this issue.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:eefc43e7b42fed8fae97ab3ce5ebd6c8ddebdab1fd270359f0c9a3e456b3848d
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":5,"vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*"],"modules":["AMF"],"product":"Free5GC","vendor":"n/a","versions":[{"status":"affected","version":"4.1.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":5,"vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-404","description":"Denial of Service","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"tags":["patch"],"url":"https://github.com/free5gc/amf/commit/52e9386401ce56ea773c5aa587d4cdf7d53da799"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/references/5
{"tags":["issue-tracking","patch"],"url":"https://github.com/free5gc/amf/pull/198"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/references/4
{"tags":["product"],"url":"https://github.com/free5gc/free5gc/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/references/6
{"tags":["issue-tracking"],"url":"https://github.com/free5gc/free5gc/issues/792"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/references/3
{"tags":["exploit"],"url":"https://github.com/free5gc/free5gc/issues/792"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/adp/0/references/0
{"name":"VDB-352319 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/?ctiid.352319"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/references/1
{"name":"VDB-352319 | Free5GC AMF handler.go HandleRegistrationComplete denial of service","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/?id.352319"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/references/0
{"name":"Submit #774073 | Linux Foundation free5GC 4.1.0 Denial of Service","tags":["third-party-advisory"],"url":"https://vuldb.com/?submit.774073"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:db280fa50f56281b433491d7b154da7fb5ecb2646ca51b6a7c03f10f9b6fd4c8 · sha256:1bed744643721e06… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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