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CVE-2026-23534

A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. A malicious server can trigger a client-side heap buffer overflow in the ClearCodec bands decode path. This vulnerability, caused by crafted band coordinates, allows writes past the end of the destination surface buffer. Successful exploitation can lead to a crash, resulting in a denial of service (DoS), and potentially arbitrary code execution.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:acc65f0488bc8cedb21db64b7c2234baa01bb078b1a83ce14a66b04fabad7ec6
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 9 assertions

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/7

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.1"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:3.10.3-5.el10_1.1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:2.11.7-2.el8_10","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/2

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/6

{"product":"FreeRDP","vendor":"FreeRDP","versions":[{"status":"affected","version":"< 3.21.0"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:2.11.7-1.el9_7.1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:3.10.3-3.el10_0.1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.4"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 9.4 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:2.11.2-1.el9_4.1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.6"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:2.11.7-1.el9_6.1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/5
cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.6,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/metrics/1/cvssV3_1
cwe · 2 assertions

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/cna/problemTypes/0/descriptions/0

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

9 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"freerdp","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/7
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.1"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:3.10.3-5.el10_1.1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:2.11.7-2.el8_10","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/6
{"product":"FreeRDP","vendor":"FreeRDP","versions":[{"status":"affected","version":"< 3.21.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:2.11.7-1.el9_7.1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:3.10.3-3.el10_0.1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.4"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 9.4 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:2.11.2-1.el9_4.1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.6"],"defaultStatus":"affected","packageName":"freerdp","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:2.11.7-1.el9_6.1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/affected/5

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.6,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/metrics/1/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-122","description":"Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

13 source assertions
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:2048"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/references/8
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:2081"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/references/5
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:2222"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/references/4
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:2736"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/references/6
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:2952"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/references/3
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:3037"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/references/7
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-23534"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/references/0
{"name":"RHBZ#2430888","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2430888"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/adp/1/references/1
{"name":"https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L878-L879","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L878-L879"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/cna/references/1
{"name":"https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L883-L884","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L883-L884"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/cna/references/2
{"name":"https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/cna/references/3
{"name":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3frr-mp8w-4599","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3frr-mp8w-4599"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23534.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4c11bb502ca7c688404298e81f2a03c05921ba46f6820b425a3e7450683d60e1 · sha256:9a0f6af7943f29c1… · /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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