CVSS
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Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: ksmbd: use check_add_overflow() to prevent u16 DACL size overflow set_posix_acl_entries_dacl() and set_ntacl_dacl() accumulate ACE sizes in u16 variables. When a file has many POSIX ACL entries, the accumulated size can wrap past 65535, causing the pointer arithmetic (char *)pndace + *size to land within already-written ACEs. Subsequent writes then overwrite earlier entries, and pndacl->size gets a truncated value. Use check_add_overflow() at each accumulation point to detect the wrap before it corrupts the buffer, consistent with existing check_mul_overflow() usage elsewhere in smbacl.c.
Засегнати продукти
- Linux Linux: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди 41e53a773db6342ac9a689ee5ba635c31744c9f0; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди 8d5729350b236896f51379588d9a690b7fafb8db; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди e1955a94b6f17f4b058afa955a6f187eb3ed7615; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди 5e7b8f3c539d69b2ed5f2408e2f75e68ce7eef43; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди ef7902be3f215b6bf7babe4dc9dd9a7d57dad7a7; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди 299f962c0b02d048fb45d248b4da493d03f3175d
- Linux Linux: 5.15; преди 5.15; 6.1.175 до 6.1.*; 6.6.136 до 6.6.*; 6.12.84 до 6.12.*; 6.18.25 до 6.18.*; 7.0.2 до 7.0.*; от 7.1 нататък
- Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: всички версии
История
- 1 май 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-31704
- https://nvd.nist.gov/vuln/detail/CVE-2026-31704
- https://git.kernel.org/stable/c/41e53a773db6342ac9a689ee5ba635c31744c9f0
- https://git.kernel.org/stable/c/8d5729350b236896f51379588d9a690b7fafb8db
- https://git.kernel.org/stable/c/e1955a94b6f17f4b058afa955a6f187eb3ed7615
- https://git.kernel.org/stable/c/5e7b8f3c539d69b2ed5f2408e2f75e68ce7eef43
- https://git.kernel.org/stable/c/ef7902be3f215b6bf7babe4dc9dd9a7d57dad7a7
- https://git.kernel.org/stable/c/299f962c0b02d048fb45d248b4da493d03f3175d
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html