CVE-2024-42265
Linux Kernel array_index_nospec speculative execution vulnerability
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.
INFO
Published Date :
Aug. 17, 2024, 9:15 a.m.
Last Modified :
Aug. 19, 2024, 12:59 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
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CVE-2024-42265.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2024-42265 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-42265 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 19, 2024
Action Type Old Value New Value Added Reference kernel.org https://git.kernel.org/stable/c/ed42e8ff509d2a61c6642d1825032072dab79f26 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/41a6c31df77bd8e050136b0a200b537da9e1084a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/08775b3d6ed117cf4518754ec7300ee42b6a5368 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/3f480493550b6a23d3a65d095d6569d4a7f56a0f [No types assigned] -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2024
Action Type Old Value New Value Added 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. Added Reference kernel.org https://git.kernel.org/stable/c/5db999fff545b924b24c9afd368ef5c17279b176 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/da72e783afd27d9f487836b2e6738146c0edd149 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/1171ceccabfd596ca370c5d2cbb47d110c3f2fe1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/8aa37bde1a7b645816cda8b80df4753ecf172bf1 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-42265 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-42265
weaknesses.