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CVE-2026-52958

libceph: Fix potential out-of-bounds access in osdmap_decode()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

In the Linux kernel, the following vulnerability has been resolved: libceph: Fix potential out-of-bounds access in osdmap_decode() When decoding osd_state and osd_weight from an incoming osdmap in osdmap_decode(), both are decoded for each osd, i.e., map->max_osd times. The ceph_decode_need() check only accounts for sizeof(*map->osd_weight) once. This can potentially result in an out-of-bounds memory access if the incoming message is corrupted such that the max_osd value exceeds the actual content of the osdmap message. This patch fixes the issue by changing the corresponding part in the ceph_decode_need() check to account for map->max_osd*sizeof(*map->osd_weight).

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From dcbc919a5dc8c2629684a113a90c0b6fe10c3462 · fixed in 36a79759a288961b1ff28a68ec2d1f56f6848098; From dcbc919a5dc8c2629684a113a90c0b6fe10c3462 · fixed in 3f2575bb7f955d42569d96c3e04fa958a0dcf4b4; From dcbc919a5dc8c2629684a113a90c0b6fe10c3462 · fixed in 8713bbc4b2b9ad78f803978e54b7e49dd21bd9be; From dcbc919a5dc8c2629684a113a90c0b6fe10c3462 · fixed in 0d2dd7e6bb74fd7712aa73457a4a821906c6863a; From dcbc919a5dc8c2629684a113a90c0b6fe10c3462 · fixed in e7187f33c02488697ec0d01d82bf7a3f8deaba8f; From dcbc919a5dc8c2629684a113a90c0b6fe10c3462 · fixed in 48df98d12b15360cd56af5c1f460307b340c1197; From dcbc919a5dc8c2629684a113a90c0b6fe10c3462 · fixed in ee933694645dac062d65fc2743f92bc06fa0db6b; From dcbc919a5dc8c2629684a113a90c0b6fe10c3462 · fixed in 35d0ed82d03e5ee77ea4f31f20e29562a7721649

  • Linux Linux

    5.3

  • KernelLinux

    From 5.3.0 · fixed in 5.10.258; From 5.11.0 · fixed in 5.15.209; From 5.16.0 · fixed in 6.1.175; From 6.2.0 · fixed in 6.6.141; From 6.7.0 · fixed in 6.12.91; From 6.13.0 · fixed in 6.18.33; From 6.19.0 · fixed in 7.0.10

References 8

git.kernel.org