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 = 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

No CVSS.

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2024-08-17 09:15

Updated : 2024-08-19 12:59

NVD link : CVE-2024-42265

Mitre link : CVE-2024-42265

CVE.ORG link : CVE-2024-42265

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2024-42265", "cveTags": [], "metrics": {}, "published": "2024-08-17T09:15:07.893", "references": [{"url": "https://git.kernel.org/stable/c/08775b3d6ed117cf4518754ec7300ee42b6a5368", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1171ceccabfd596ca370c5d2cbb47d110c3f2fe1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3f480493550b6a23d3a65d095d6569d4a7f56a0f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/41a6c31df77bd8e050136b0a200b537da9e1084a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5db999fff545b924b24c9afd368ef5c17279b176", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8aa37bde1a7b645816cda8b80df4753ecf172bf1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/da72e783afd27d9f487836b2e6738146c0edd149", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ed42e8ff509d2a61c6642d1825032072dab79f26", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Awaiting Analysis", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nprotect the fetch of ->fd[fd] in do_dup2() from mispredictions\n\nboth callers have verified that fd is not greater than ->max_fds;\nhowever, misprediction might end up with\n tofree = fdt->fd[fd];\nbeing speculatively executed. That's wrong for the same reasons\nwhy it's wrong in close_fd()/file_close_fd_locked(); the same\nsolution applies - array_index_nospec(fd, fdt->max_fds) could differ\nfrom fd only in case of speculative execution on mispredicted path."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: proteger la recuperaci\u00f3n de ->fd[fd] en do_dup2() de predicciones err\u00f3neas; ambos llamadores han verificado que fd no es mayor que ->max_fds; sin embargo, una predicci\u00f3n err\u00f3nea podr\u00eda terminar con tofree = fdt->fd[fd]; siendo ejecutado especulativamente. Eso est\u00e1 mal por las mismas razones por las que est\u00e1 mal en close_fd()/file_close_fd_locked(); se aplica la misma soluci\u00f3n: array_index_nospec(fd, fdt->max_fds) podr\u00eda diferir de fd solo en caso de ejecuci\u00f3n especulativa en una ruta mal prevista."}], "lastModified": "2024-08-19T12:59:59.177", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}