{"id":"CVE-2026-110839","title":"FreeRDP 3.3.0 before 3.32.0, when built with WINPR_UTILS_IMAGE_JPEG=ON, has a heap-based out-of-bounds write in winpr_convert_from_jpeg because grayscale JPEG buffers are sized from one input component rather than three BGR output compon…","summary":"FreeRDP 3.3.0 before 3.32.0, when built with WINPR_UTILS_IMAGE_JPEG=ON, has a heap-based out-of-bounds write in winpr_convert_from_jpeg because grayscale JPEG buffers are sized from one input component rather than three BGR output compon…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","cwe":["CWE-787"],"vendor":"FreeRDP","product":"FreeRDP","affected":["FreeRDP >= 3.3.0 < 3.32.0"],"published":"2026-10-14","updated":"2026-10-15","sourceUpdated":"2026-10-15T16:17:47.300","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110839","references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-write-via-grayscale-jpeg-clipboard-data","label":"disclosure@vulncheck.com"},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110839.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-110839"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2552996"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-110839"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110839"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-15T15:32:10.467016Z"},"ingestedAt":"2026-10-15T00:02:07.174Z","epss":0.00272,"epssPercentile":0.19418,"slug":"CVE-2026-110839","body":"## Overview\n\nFreeRDP 3.3.0 before 3.32.0, when built with WINPR_UTILS_IMAGE_JPEG=ON, has a heap-based out-of-bounds write in winpr_convert_from_jpeg because grayscale JPEG buffers are sized from one input component rather than three BGR output components. A malicious RDP server can offer a grayscale JPEG via clipboard redirection, corrupting client memory and crashing it when the item is pasted as CF_DIB bitmap data.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110839.json)","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":39.1,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":222426,"id":"CVE-2026-110839","ts":1792080926094,"field":"exploit_available","old":"false","new":"true"}]}