A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 26.6. An app may be able to cause unexpected system termination.
PUBLISHED5.2
Problem type
- An app may be able to cause unexpected system termination
Affected products
Apple
macOS
< 26.6 - AFFECTED
References
GitHub Security Advisories
GHSA-jw76-wr94-p2rj
A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe...
https://github.com/advisories/GHSA-jw76-wr94-p2rjA buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 26.6. An app may be able to cause unexpected system termination.
From Hacker News
JSON source
https://cveawg.mitre.org/api/cve/CVE-2026-64691Click to expand
{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-64691",
"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"assignerShortName": "apple",
"dateUpdated": "2026-07-27T20:14:52.091Z",
"dateReserved": "2026-07-20T18:09:01.158Z",
"datePublished": "2026-07-27T20:14:52.091Z",
"state": "PUBLISHED"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"shortName": "apple",
"dateUpdated": "2026-07-27T20:14:52.091Z"
},
"descriptions": [
{
"lang": "en",
"value": "A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 26.6. An app may be able to cause unexpected system termination."
}
],
"affected": [
{
"vendor": "Apple",
"product": "macOS",
"versions": [
{
"version": "0",
"status": "affected",
"versionType": "custom",
"lessThan": "26.6"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "An app may be able to cause unexpected system termination"
}
]
}
],
"references": [
{
"url": "https://support.apple.com/en-us/128067"
}
]
}
}
}
CVE-2026-64691: Ruslan Dautov, Ruslan Dautov