CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, при специфични условия, с обикновен потребителски вход и без действие от потребителя.
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix heap overflow in cifs_do_set_acl() cifs_set_acl() validates ACL size using posix_acl_xattr_size(): 4 + (count * 8) // 4-byte header + 8 bytes per ACE cifs_do_set_acl() then calls posix_acl_to_cifs() to write the CIFS wire format into the same buffer: 6 + (count * 10) // 6-byte header + 10 bytes per ACE An ACL that passes the xattr-based check in cifs_set_acl() can overflow the heap when posix_acl_to_cifs() writes the larger CIFS format. Validate the CIFS format size against the remaining buffer space and USHRT_MAX before converting--data_count is __u16, so sizes above USHRT_MAX truncate the on-wire packet length, causing the server to apply a partial ACL. Replace MaxDataCount = 1000 with min(CIFSMaxBufSize, USHRT_MAX).
Засегнати продукти
- Linux Linux: dc1af4c4b4721abfa07b351063825acc7e69cc66 преди 68652afb9b9adf70125971abee9b95341e042249; dc1af4c4b4721abfa07b351063825acc7e69cc66 преди 9312a00215602ba028495ef3fa00fb84af0478e0; dc1af4c4b4721abfa07b351063825acc7e69cc66 преди d96f3365ce61c5f39602955af43c8174548dee98; dc1af4c4b4721abfa07b351063825acc7e69cc66 преди 596b4062e6c75bdd85a7f2b7f2087a872dc420ac; dc1af4c4b4721abfa07b351063825acc7e69cc66 преди 1dac61e2c29d1a71784604b48cf3b1234a65ec29
- Linux Linux: 6.2; преди 6.2; 6.6.161 до 6.6.*; 6.12.115 до 6.12.*; 6.18.59 до 6.18.*; 7.2.13 до 7.2.*; от 7.3 нататък
История
- 28 октомври 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-99110
- https://nvd.nist.gov/vuln/detail/CVE-2026-99110
- https://git.kernel.org/stable/c/68652afb9b9adf70125971abee9b95341e042249
- https://git.kernel.org/stable/c/9312a00215602ba028495ef3fa00fb84af0478e0
- https://git.kernel.org/stable/c/d96f3365ce61c5f39602955af43c8174548dee98
- https://git.kernel.org/stable/c/596b4062e6c75bdd85a7f2b7f2087a872dc420ac
- https://git.kernel.org/stable/c/1dac61e2c29d1a71784604b48cf3b1234a65ec29