CVE-2026-45960
published 2026-05-27CVE-2026-45960: In the Linux kernel, the following vulnerability has been resolved: hfsplus: return error when node already exists in hfs_bnode_create When hfs_bnode_create()…
medium5.5
In the Linux kernel, the following vulnerability has been resolved:
hfsplus: return error when node already exists in hfs_bnode_create
When hfs_bnode_create() finds that a node is already hashed (which should
not happen in normal operation), it currently returns the existing node
without incrementing its reference count. This causes a reference count
inconsistency that leads to a kernel panic when the node is later freed
in hfs_bnode_put():
kernel BUG at fs/hfsplus/bnode.c:676!
BUG_ON(!atomic_read(&node->refcnt))
This scenario can occur when hfs_bmap_alloc() attempts to allocate a node
that is already in use (e.g., when node 0's bitmap bit is incorrectly
unset), or due to filesystem corruption.
Returning an existing node from a create path is not normal operation.
Fix this by returning ERR_PTR(-EEXIST) instead of the node when it's
already hashed. This properly signals the error condition to callers,
which already check for IS_ERR() return values.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 634725a92938b0f282b17cec0b007dca77adebd2 < 1ca428769cb4737a25bd32fb4d1573cc09eeaeef | 1ca428769cb4737a25bd32fb4d1573cc09eeaeef |
| linux | linux | >= 634725a92938b0f282b17cec0b007dca77adebd2 < 507a1de58c21c95ad7c44afccaf1222d1c42246b | 507a1de58c21c95ad7c44afccaf1222d1c42246b |
| linux | linux | >= 634725a92938b0f282b17cec0b007dca77adebd2 < 986455135b95f32c1f142068e451098fc751749e | 986455135b95f32c1f142068e451098fc751749e |
| linux | linux | >= 634725a92938b0f282b17cec0b007dca77adebd2 < 7b57ada854b32310f224abd61bcfec2d5790ff0a | 7b57ada854b32310f224abd61bcfec2d5790ff0a |
| linux | linux | >= 634725a92938b0f282b17cec0b007dca77adebd2 < 51838112d9c22502333c3085ca0c0d691e7093c6 | 51838112d9c22502333c3085ca0c0d691e7093c6 |
| linux | linux | >= 634725a92938b0f282b17cec0b007dca77adebd2 < 2e6ff6a6fc69cc17ed10c9cb6242935d52acd52d | 2e6ff6a6fc69cc17ed10c9cb6242935d52acd52d |
| linux | linux | >= 634725a92938b0f282b17cec0b007dca77adebd2 < 2e9185a42e0e237c74435fd092b7c34537c62156 | 2e9185a42e0e237c74435fd092b7c34537c62156 |
| linux | linux | >= 634725a92938b0f282b17cec0b007dca77adebd2 < d8a73cc46c8462a969a7516131feb3096f4c49d3 | d8a73cc46c8462a969a7516131feb3096f4c49d3 |
| linux | linux_kernel | — | — |