A 32-bit unsigned integer overflow in the XWD (X Windows) encoder can cause an undersized heap buffer allocation. When writing a extremely large image an out of bounds heap write can occur.
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==741961==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x5020000083dc at pc 0x56553b4c4245 bp 0x7ffd9d20fef0 sp 0x7ffd9d20fee0
WRITE of size 1 at 0x5020000083dc thread T0
{
"sources": [
{
"database_specific": {
"status": "Analyzed"
},
"id": "CVE-2026-30937",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30937",
"published": "2026-03-10T07:44:57.840Z",
"imported": "2026-07-30T14:08:46.361Z",
"modified": "2026-06-17T10:33:11.043Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-30937"
},
{
"id": "GHSA-qpg4-j99f-8xcg",
"html_url": "https://github.com/advisories/GHSA-qpg4-j99f-8xcg",
"published": "2026-03-12T14:16:51Z",
"url": "https://api.github.com/advisories/GHSA-qpg4-j99f-8xcg",
"modified": "2026-03-12T14:16:53Z",
"imported": "2026-07-30T14:09:50.481Z"
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{
"imported": "2026-07-30T14:08:54.685Z",
"html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-10402",
"published": "2026-03-09T21:50:15Z",
"url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-10402",
"modified": "2026-03-10T14:34:52Z",
"id": "EUVD-2026-10402"
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