CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени 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: validate absolute native symlink targets before NT fixups With symlinkroot unset, an absolute target is copied without conversion to an NT drive path. Later code still assumes an NT prefix is present when modifying the target and calculating the print name length. For "/ab", this causes two failures: sym[5] and path[5] are written past their allocations, and plen -= 2 * poff subtracts an assumed 8-byte prefix from a 6-byte UTF-16 target, wrapping u16 plen to 65534. That underflow causes another overflow: memcpy() copies 65534 bytes into a 24-byte buffer. A user with write access to a mounted share can trigger these bugs with default settings. Validate the NT drive prefix, including an ASCII drive letter, before accessing fixed offsets or subtracting the prefix length.
Засегнати продукти
- Linux Linux: 3363da82e02f1bddc54faa92ea430c6532e2cd2e преди 6913ff607c2bc8694193e1fcc40bf16d75f35f16; 3363da82e02f1bddc54faa92ea430c6532e2cd2e преди 23c240d9509e15f72e4112fc95f0160ab32ec430; b6ea7b6c6be65149ab6b8e37a9dd1671f76add1b; 6.15.6 преди 6.16
- Linux Linux: 6.16; преди 6.16; 7.2.8 до 7.2.*; 7.3 до *
История
- 6 октомври 2026 Публикувано