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CVE-2026-33986

A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. A remote attacker could exploit a memory allocation vulnerability in the H.264 codec by enticing a user to connect to a malicious server. This flaw occurs when internal buffer dimensions are incorrectly updated after a failed memory reallocation, potentially leading to a heap-based buffer overflow. Successful exploitation could result in arbitrary code execution or a denial of service (DoS), compromising the avail
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:22e4509e5ec53d49a95cc78aa11539705399d3a926de813666f66d6c2d04b7d8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 6 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"freerdp","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"freerdp","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"freerdp","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/affected/3

{"product":"FreeRDP","vendor":"FreeRDP","versions":[{"status":"affected","version":"< 3.24.2"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unknown","packageName":"freerdp","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"freerdp","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/affected/1
cwe · 3 assertions

{"cweId":"CWE-131","description":"CWE-131: Incorrect Calculation of Buffer Size","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-131","description":"Incorrect Calculation of Buffer Size","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/problemTypes/0/descriptions/0

{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

6 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"freerdp","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"freerdp","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"freerdp","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/affected/3
{"product":"FreeRDP","vendor":"FreeRDP","versions":[{"status":"affected","version":"< 3.24.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unknown","packageName":"freerdp","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"freerdp","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/affected/1

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/cna/metrics/0/cvssV3_1
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/metrics/1/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-131","description":"CWE-131: Incorrect Calculation of Buffer Size","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-131","description":"Incorrect Calculation of Buffer Size","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/problemTypes/0/descriptions/0
{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-33986"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/references/0
{"name":"RHBZ#2453221","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2453221"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/references/1
{"name":"https://github.com/FreeRDP/FreeRDP/commit/f6e43e208958140074ae9bb93cd0c9045a371c77","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/commit/f6e43e208958140074ae9bb93cd0c9045a371c77"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/cna/references/1
{"name":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h6qw-wxvm-hf97","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h6qw-wxvm-hf97"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33986.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ddba259bf3f59332c3bf7d412ca3bb3bd14972145111d147403c4603b861907c · sha256:0f20f99c9a1fb1f5… · /containers/adp/1/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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