CVE-2026-52954 (GCVE-0-2026-52954)
Vulnerability from cvelistv5
Published
2026-06-24 16:28
Modified
2026-10-19 19:47
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: libceph: handle rbtree insertion error in decode_choose_args() A message of type CEPH_MSG_OSD_MAP contains an OSD map that itself contains a CRUSH map. The received CRUSH map may optionally contain choose_args that get decoded in decode_choose_args(). In this function, num_choose_arg_maps is read from the message, and a corresponding number of crush_choose_arg_maps gets decoded afterwards. Each crush_choose_arg_map has a choose_args_index, which serves as the key when inserting it into the choose_args rbtree of the decoded crush_map. If a (potentially corrupted) message contains two crush_choose_arg_maps with the same index, the assertion in insert_choose_arg_map() triggers a kernel BUG when trying to insert the second crush_choose_arg_map. This patch fixes the issue by switching to the non-asserting rbtree insertion function and rejecting the message if the insertion fails. [ idryomov: changelog ]
References
Impacted products
Vendor Product Version
Linux Linux Version: 5cf9c4a9959b6273675310d14a834ef14fbca37c
Version: 5cf9c4a9959b6273675310d14a834ef14fbca37c
Version: 5cf9c4a9959b6273675310d14a834ef14fbca37c
Version: 5cf9c4a9959b6273675310d14a834ef14fbca37c
Version: 5cf9c4a9959b6273675310d14a834ef14fbca37c
Version: 5cf9c4a9959b6273675310d14a834ef14fbca37c
Version: 5cf9c4a9959b6273675310d14a834ef14fbca37c
Version: 5cf9c4a9959b6273675310d14a834ef14fbca37c
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  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.