CVE-2024-42265
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 =…
Does this matter?
Lower severity and a low EPSS score (0.28%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.28% probability · 20th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/08775b3d6ed117cf4518754ec7300ee42b6a5368Patch
- https://git.kernel.org/stable/c/1171ceccabfd596ca370c5d2cbb47d110c3f2fe1Patch
- https://git.kernel.org/stable/c/3f480493550b6a23d3a65d095d6569d4a7f56a0fPatch
- https://git.kernel.org/stable/c/41a6c31df77bd8e050136b0a200b537da9e1084aPatch
- https://git.kernel.org/stable/c/5db999fff545b924b24c9afd368ef5c17279b176Patch
- https://git.kernel.org/stable/c/8aa37bde1a7b645816cda8b80df4753ecf172bf1Patch
- https://git.kernel.org/stable/c/da72e783afd27d9f487836b2e6738146c0edd149Patch
- https://git.kernel.org/stable/c/ed42e8ff509d2a61c6642d1825032072dab79f26Patch
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.