Description
In the Linux kernel, the following vulnerability has been resolved: libceph: Fix potential out-of-bounds access in crush_decode() A message of type CEPH_MSG_OSD_MAP containing a crush map with at least one bucket has two fields holding the bucket algorithm. If the values in these two fields differ, an out-of-bounds access can occur. This is the case because the first algorithm field (alg) is used to allocate the correct amount of memory for a bucket of this type, while the second algorithm field inside the bucket (b->alg) is used in the subsequent processing. This patch fixes the issue by adding a check that compares alg and b->alg and aborts the processing in case they differ. Furthermore, b->alg is set to 0 in this case, because the destruction of the crush map also uses this field to determine the bucket type, which can again result in an out-of-bounds access when trying to free the memory pointed to by the fields of the bucket. To correctly free the memory allocated for the bucket in such a case, the corresponding call to kfree is moved from the algorithm-specific crush_destroy_bucket functions to the generic crush_destroy_bucket().
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to <6e70ef53e818c53eab28d7b0026b7fd03dddaba5; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to <ebe76d58a48a48031b98543d86c4cd30a825b622; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to <3f42508191e129ee6b5ea96578d5cab14f2a013a; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to <ea0d42137f0c06da71e37ffc647aab4c5309599a; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to <cceb10023e76bc89f3fe9238ebd0ccab0fc7c7c5; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to <0f3604cbe4df14c5e58288ac9f57511e726a222d; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to <fb176a99e4c1a5a8448a83d83d3606203ba81faa; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to <4c79fc2d598694bda845b46229c9d48b65042970; 0 to <5.10.258; 0 to <5.15.209; 0 to <6.1.175; 0 to <6.6.141; 0 to <6.12.91; 0 to <6.18.33; 0 to <7.0.10 |
| Linux | Linux | 5.10.258 to <=5.10.*; 5.15.209 to <=5.15.*; 6.1.175 to <=6.1.*; 6.6.141 to <=6.6.*; 6.12.91 to <=6.12.*; 6.18.33 to <=6.18.*; 7.0.10 to <=7.0.*; 7.1 to <=* |
References
- https://git.kernel.org/stable/c/6e70ef53e818c53eab28d7b0026b7fd03dddaba5
- https://git.kernel.org/stable/c/ebe76d58a48a48031b98543d86c4cd30a825b622
- https://git.kernel.org/stable/c/3f42508191e129ee6b5ea96578d5cab14f2a013a
- https://git.kernel.org/stable/c/ea0d42137f0c06da71e37ffc647aab4c5309599a
- https://git.kernel.org/stable/c/cceb10023e76bc89f3fe9238ebd0ccab0fc7c7c5
- https://git.kernel.org/stable/c/0f3604cbe4df14c5e58288ac9f57511e726a222d
- https://git.kernel.org/stable/c/fb176a99e4c1a5a8448a83d83d3606203ba81faa
- https://git.kernel.org/stable/c/4c79fc2d598694bda845b46229c9d48b65042970
Generated from the official CVE List on 25 Jun 2026 10:14 UTC.