CVE-2018-20991
CRITICAL9.8EPSS 0.43%Possible double free during unwinding in SmallVec::insert_many
發布日:2021/8/25修改日:2023/11/8
描述
If an iterator passed to `SmallVec::insert_many` panicked in `Iterator::next`, destructors were run during unwinding while the vector was in an inconsistent state, possibly causing a double free (a destructor running on two copies of the same value). This is fixed in smallvec 0.6.3 by ensuring that the vector's length is not updated to include moved items until they have been removed from their original positions. Items may now be leaked if `Iterator::next` panics, but they will not be dropped more than once. Thank you to @Vurich for reporting this bug.
受影響套件(2)
- crates.io/smallvec>= 0.3.2, < 0.6.3
- crates.io/smallvec>= 0.3.2, < 0.3.4, >= 0.4.0-0, < 0.4.5, >= 0.5.0-0, < 0.5.1, >= 0.6.0-0, < 0.6.3
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |