{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33983","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-24T22:20:06.210Z","datePublished":"2026-03-30T21:42:27.798Z","dateUpdated":"2026-06-30T12:09:18.886Z"},"containers":{"cna":{"title":"FreeRDP: Progressive Codec Quant BYTE Underflow - UB + CPU DoS","problemTypes":[{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"CWE-190: Integer Overflow or Wraparound","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-252","lang":"en","description":"CWE-252: Unchecked Return Value","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478"},{"name":"https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425"}],"affected":[{"vendor":"FreeRDP","product":"FreeRDP","versions":[{"version":"< 3.24.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-30T21:42:27.798Z"},"descriptions":[{"lang":"en","value":"FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only emits WLog_WARN, execution continues. The wrapped value (247) is used as a shift exponent, causing undefined behavior and an approximately 80 billion iteration loop (CPU DoS). This issue has been patched in version 3.24.2."}],"source":{"advisory":"GHSA-4gfm-4p52-h478","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-31T15:31:53.424436Z","id":"CVE-2026-33983","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-31T15:32:05.510Z"}},{"affected":[{"cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream EUS (v. 10.0)","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:10.1","cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream (v. 10)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:enterprise_linux:8::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream (v. 8)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_aus:8.2::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream AUS (v. 8.2)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream AUS (v.8.4)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream AUS (v.8.6)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_e4s:8.6::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream E4S (v.8.6)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_tus:8.6::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream TUS (v.8.6)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream E4S (v.8.8)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_tus:8.8::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream TUS (v.8.8)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_e4s:9.0::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream E4S (v.9.0)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_e4s:9.2::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream E4S (v.9.2)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_eus:9.4::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream EUS (v.9.4)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_eus:9.6::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream EUS (v.9.6)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:enterprise_linux:9::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream (v. 9)","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:10.1","cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:enterprise_linux:8::crb"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux CRB (v. 8)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_eus:9.4::crb"],"defaultStatus":"affected","product":"Red Hat CodeReady Linux Builder EUS (v.9.4)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_eus:9.6::crb"],"defaultStatus":"affected","product":"Red Hat CodeReady Linux Builder EUS (v.9.6)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:enterprise_linux:9::crb"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}],"datePublic":"2026-03-30T21:42:27.798Z","descriptions":[{"lang":"en","value":"A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol (RDP). A remote attacker could exploit this vulnerability by sending a specially crafted RDP message. This can lead to an undefined behavior where a wrapped value is used as a shift exponent, causing an approximately 80 billion iteration loop. This results in a Denial of Service (DoS) due to excessive CPU utilization."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","description":"Integer Overflow or Wraparound","lang":"en","type":"CWE"}]}],"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-33983"},{"name":"RHBZ#2453220","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2453220"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33983.json"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11333"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:8458"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:19033"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:8945"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11651"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11649"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:12388"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:12359"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11332"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11336"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:10709"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:9656"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:8457"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:19349"}],"solutions":[{"lang":"en","value":"RHSA-2026:11333: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)"},{"lang":"en","value":"RHSA-2026:8458: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"},{"lang":"en","value":"RHSA-2026:19033: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"},{"lang":"en","value":"RHSA-2026:8945: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8)"},{"lang":"en","value":"RHSA-2026:11651: Red Hat Enterprise Linux AppStream AUS (v. 8.2)"},{"lang":"en","value":"RHSA-2026:11649: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"},{"lang":"en","value":"RHSA-2026:12388: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6)"},{"lang":"en","value":"RHSA-2026:12359: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"},{"lang":"en","value":"RHSA-2026:11332: Red Hat Enterprise Linux AppStream E4S (v.9.0)"},{"lang":"en","value":"RHSA-2026:11336: Red Hat Enterprise Linux AppStream E4S (v.9.2)"},{"lang":"en","value":"RHSA-2026:10709: Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.4)"},{"lang":"en","value":"RHSA-2026:9656: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"},{"lang":"en","value":"RHSA-2026:8457: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"},{"lang":"en","value":"RHSA-2026:19349: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"}],"timeline":[{"lang":"en","time":"2026-03-30T22:01:29.031Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-03-30T21:42:27.798Z","value":"Made public."}],"title":"FreeRDP: FreeRDP: Denial of Service 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