CVE-2026-71394

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{"bugzilla": {"description": "emacs: use of uninitialized memory via a malicious font file", "id": "2513078", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513078"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.6", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-1284", "details": ["GNU Emacs for Android improperly validates the table header input in sfnt_read_table_directory() in src/sfnt.c. Due to an incorrect comparison variable in the read-length check, a crafted font file that claims to contain more table directory entries than actually present causes the parser to return a struct with uninitialized heap memory in the table directory entries.\u00a0An attacker can deliver a malicious font file via email, EWW (Emacs Web Wowser), or documents with custom faces, causing Emacs to load it. This leads to the use of uninitialized heap data in subsequent table lookups, potentially resulting in information disclosure, crashes, or arbitrary memory access on 32-bit targets.\nThis issue is fixed after commit\u00a07621ee1d01229d50e5c0cddea6bf0b01095a62cf", "A flaw was found in GNU Emacs for Android. Improper validation of table header input in the `sfnt_read_table_directory()` function allows a crafted font file to cause the parser to return a structure with uninitialized heap memory. An attacker can deliver a malicious font file, leading to the use of this uninitialized data in subsequent table lookups. This can potentially result in information disclosure, application crashes, or arbitrary memory access on 32-bit systems."], "name": "CVE-2026-71394", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "emacs", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "emacs", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "emacs", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "emacs", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "emacs", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-10T10:23:11Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-71394\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-71394\nhttps://cert.pl/en/posts/2026/08/CVE-2026-71391\nhttps://www.gnu.org/savannah-checkouts/gnu/emacs/emacs.html"], "threat_severity": "Important"}

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