CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: ksmbd: require 3 sub-authorities before reading sub_auth[2] parse_dacl() compares each ACE SID against sid_unix_NFS_mode and on match reads sid.sub_auth[2] as the file mode. If sid_unix_NFS_mode is the prefix S-1-5-88-3 with num_subauth = 2 then compare_sids() compares only min(num_subauth, 2) sub-authorities so a client SID with num_subauth = 2 and sub_auth = {88, 3} will match. If num_subauth = 2 and the ACE is placed at the very end of the security descriptor, sub_auth[2] will be 4 bytes past end_of_acl. The out-of-band bytes will then be masked to the low 9 bits and applied as the file's POSIX mode, probably not something that is good to have happen. Fix this up by forcing the SID to actually carry a third sub-authority before reading it at all.
Засегнати продукти
- Linux Linux: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди cf2148b880fb7c0fcd727202dbc4fd5d6998b9c2; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди b5b5d5936a50497fb151c0b122899a6894721c2b; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди 08f9e6d899b5c834bbcc239eae1bed58d9b15d2c; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди d2454f4a002d08560a60f214f392e6491cf11560; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди 46bbcd3ebfb3549c8da1838fc4493e79bd3241e7; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди 9401f86a224f37b50e6a3ccf1d46a70d5ef8af0a; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 преди 53370cf9090777774e07fd9a8ebce67c6cc333ab
- Linux Linux: 5.15; преди 5.15; 6.1.175 до 6.1.*; 6.6.136 до 6.6.*; 6.12.83 до 6.12.*; 6.18.24 до 6.18.*; 6.19.14 до 6.19.*; 7.0.1 до 7.0.*; от 7.1 нататък
- Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: всички версии
История
- 24 април 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-31611
- https://nvd.nist.gov/vuln/detail/CVE-2026-31611
- https://git.kernel.org/stable/c/cf2148b880fb7c0fcd727202dbc4fd5d6998b9c2
- https://git.kernel.org/stable/c/b5b5d5936a50497fb151c0b122899a6894721c2b
- https://git.kernel.org/stable/c/08f9e6d899b5c834bbcc239eae1bed58d9b15d2c
- https://git.kernel.org/stable/c/d2454f4a002d08560a60f214f392e6491cf11560
- https://git.kernel.org/stable/c/46bbcd3ebfb3549c8da1838fc4493e79bd3241e7
- https://git.kernel.org/stable/c/9401f86a224f37b50e6a3ccf1d46a70d5ef8af0a
- https://git.kernel.org/stable/c/53370cf9090777774e07fd9a8ebce67c6cc333ab
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html