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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-45960

hfsplus: return error when node already exists in hfs_bnode_create

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 634725a92938b0f282b17cec0b007dca77adebd2 to < 1ca428769cb4737a25bd32fb4d1573cc09eeaeefaffected
  • 634725a92938b0f282b17cec0b007dca77adebd2 to < 507a1de58c21c95ad7c44afccaf1222d1c42246baffected
  • 634725a92938b0f282b17cec0b007dca77adebd2 to < 986455135b95f32c1f142068e451098fc751749eaffected
  • 634725a92938b0f282b17cec0b007dca77adebd2 to < 7b57ada854b32310f224abd61bcfec2d5790ff0aaffected
  • 634725a92938b0f282b17cec0b007dca77adebd2 to < 51838112d9c22502333c3085ca0c0d691e7093c6affected
  • 634725a92938b0f282b17cec0b007dca77adebd2 to < 2e6ff6a6fc69cc17ed10c9cb6242935d52acd52daffected
  • 634725a92938b0f282b17cec0b007dca77adebd2 to < 2e9185a42e0e237c74435fd092b7c34537c62156affected
  • 634725a92938b0f282b17cec0b007dca77adebd2 to < d8a73cc46c8462a969a7516131feb3096f4c49d3affected

Linux Linux

Default version status: affected

  • 2.6.16affected
  • 0 to < 2.6.16unaffected
  • 5.10.252 to ≤ 5.10.*unaffected
  • 5.15.202 to ≤ 5.15.*unaffected
  • 6.1.165 to ≤ 6.1.*unaffected
  • 6.6.128 to ≤ 6.6.*unaffected
  • 6.12.75 to ≤ 6.12.*unaffected
  • 6.18.14 to ≤ 6.18.*unaffected
  • 6.19.4 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References