CVE-2026-52958

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).

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxdcbc919a5dc8c2629684a113a90c0b6fe10c3462 < 36a79759a288961b1ff28a68ec2d1f56f6848098affected
LinuxLinuxdcbc919a5dc8c2629684a113a90c0b6fe10c3462 < 3f2575bb7f955d42569d96c3e04fa958a0dcf4b4affected
LinuxLinuxdcbc919a5dc8c2629684a113a90c0b6fe10c3462 < 8713bbc4b2b9ad78f803978e54b7e49dd21bd9beaffected
LinuxLinuxdcbc919a5dc8c2629684a113a90c0b6fe10c3462 < 0d2dd7e6bb74fd7712aa73457a4a821906c6863aaffected
LinuxLinuxdcbc919a5dc8c2629684a113a90c0b6fe10c3462 < e7187f33c02488697ec0d01d82bf7a3f8deaba8faffected
LinuxLinuxdcbc919a5dc8c2629684a113a90c0b6fe10c3462 < 48df98d12b15360cd56af5c1f460307b340c1197affected
LinuxLinuxdcbc919a5dc8c2629684a113a90c0b6fe10c3462 < ee933694645dac062d65fc2743f92bc06fa0db6baffected
LinuxLinuxdcbc919a5dc8c2629684a113a90c0b6fe10c3462 < 35d0ed82d03e5ee77ea4f31f20e29562a7721649affected
LinuxLinux5.3affected
LinuxLinux0 < 5.3unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.141 <= 6.6.*unaffected
LinuxLinux6.12.91 <= 6.12.*unaffected
LinuxLinux6.18.33 <= 6.18.*unaffected
LinuxLinux7.0.10 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References