CVE-2026-52957

Enriched by CISA
 

In the Linux kernel, the following vulnerability has been resolved: libceph: Fix potential null-ptr-deref in decode_choose_args() A message of type CEPH_MSG_OSD_MAP contains an OSD map that itself contains a CRUSH map. When decoding this CRUSH map in crush_decode(), an array of max_buckets CRUSH buckets is decoded, where some indices may not refer to actual buckets and are therefore set to NULL. The received CRUSH map may optionally contain choose_args that get decoded in decode_choose_args(). When decoding a crush_choose_arg_map, a series of choose_args for different buckets is decoded, with the bucket_index being read from the incoming message. It is only checked that the bucket index does not exceed max_buckets, but not that it doesn't point to an index with a NULL bucket. If a (potentially corrupted) message contains a crush_choose_arg_map including such a bucket_index, a null pointer dereference may occur in the subsequent processing when attempting to access the bucket with the given index. This patch fixes the issue by extending the affected check. Now, it is only attempted to access the bucket if it is not NULL.
https://nvd.nist.gov/vuln/detail/CVE-2026-52957

Categories

No category defined

References


 

AFFECTED (from MITRE)

Vendor Product Versions
Linux Linux
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d55ffad8d422b5d1cc44dad32bd3d25f4471cd9f [affected]
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 301286c0ccd37d66b0e40786fd35a4f19cdbd88a [affected]
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7169f326a23d0f547fcd90e68b72fd387622e126 [affected]
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d7a65a34d2453f8cd3e0cc0e1319740af7e24276 [affected]
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 312ec973efac0efb9b9ed64214235910e9ecbaa8 [affected]
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f2f95e6d4b97e70bb876139b0583fc8079983f85 [affected]
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a20e16ebfe2fa65348eb4b2dc7deac330ce03e9c [affected]
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 28b0a2ab8c82d0bbdeb8013029c67c978ce6e4bf [affected]
  • < 5.10.258 [affected]
  • < 5.15.209 [affected]
  • < 6.1.175 [affected]
  • < 6.6.141 [affected]
  • < 6.12.91 [affected]
  • < 6.18.33 [affected]
  • < 7.0.10 [affected]
Linux Linux
  • 5.10.258 ≤ 5.10.* [unaffected]
  • 5.15.209 ≤ 5.15.* [unaffected]
  • 6.1.175 ≤ 6.1.* [unaffected]
  • 6.6.141 ≤ 6.6.* [unaffected]
  • 6.12.91 ≤ 6.12.* [unaffected]
  • 6.18.33 ≤ 6.18.* [unaffected]
  • 7.0.10 ≤ 7.0.* [unaffected]
  • 7.1 ≤ * [unaffected]
© 2022 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.

CPE

cpe start end
Configuration 1
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* < 5.10.258
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* < 5.15.209
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* < 6.1.175
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* < 6.6.141
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* < 6.12.91
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* < 6.18.33
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* < 7.0.10
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* < 7.1

REMEDIATION


EXPLOITS

Exploit-db.com

id description date
No known exploits

POC Github

Url
No known exploits

Other Nist (github, ...)

Url
No known exploits

CAPEC

Common Attack Pattern Enumerations and Classifications

id description severity
No entry