CVE-2024-42265
Published: March 27, 2024Last modified: March 27, 2024
Description
In the Linux kernel, the following vulnerability has been resolved: protect the fetch of ->fd[fd] in do_dup2() from mispredictions both callers have verified that fd is not greater than ->max_fds; however, misprediction might end up with tofree = fdt->fd[fd]; being speculatively executed. That's wrong for the same reasons why it's wrong in close_fd()/file_close_fd_locked(); the same solution applies - array_index_nospec(fd, fdt->max_fds) could differ from fd only in case of speculative execution on mispredicted path.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.104-r0) |
| 25 LTS | linux-lts | Fixed (6.12.41-r0) | |
| Stream | linux-lts | Fixed (6.12.41-r0) |
References
- https://git.kernel.org/stable/c/08775b3d6ed117cf4518754ec7300ee42b6a5368
- https://git.kernel.org/stable/c/1171ceccabfd596ca370c5d2cbb47d110c3f2fe1
- https://git.kernel.org/stable/c/3f480493550b6a23d3a65d095d6569d4a7f56a0f
- https://git.kernel.org/stable/c/41a6c31df77bd8e050136b0a200b537da9e1084a
- https://git.kernel.org/stable/c/5db999fff545b924b24c9afd368ef5c17279b176
- https://git.kernel.org/stable/c/8aa37bde1a7b645816cda8b80df4753ecf172bf1
- https://git.kernel.org/stable/c/da72e783afd27d9f487836b2e6738146c0edd149
- https://git.kernel.org/stable/c/ed42e8ff509d2a61c6642d1825032072dab79f26