Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: udf: validate free block extents against the partition length udf_free_blocks() checks the logical block number and count against the partition length, but drops the extent offset from that final bound. A crafted extent can pass the guard while logicalBlockNum + offset + count points past the partition, which later indexes past the space bitmap array. A single ftruncate(2) on a file backed by such an extent reliably panics the kernel. This is a local availability issue. On desktop systems where UDisks/polkit allows the active user to mount removable UDF media without CAP_SYS_ADMIN, an unprivileged local user can supply the crafted filesystem and trigger the panic by truncating a writable file on it. Systems that require root or CAP_SYS_ADMIN to mount the image have a higher prerequisite. No confidentiality or integrity impact is claimed: the reproduced primitive is an out-of-bounds read of a bitmap pointer slot followed by a kernel panic. Use the already computed logicalBlockNum + offset + count value for the partition length check. Also make load_block_bitmap() reject an out-of-range block group before indexing s_block_bitmap[], so corrupted callers cannot walk past the flexible array.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 934f815345c09c290a9b9a9cfdddc203ec2117e8 before fdd6229d2ae9914c1f25d1041db0f4f312a4fa76; affected 22cc7323f090646c8cfb5939e6f15bdc2ed3fd27 before b54aee5652fcd7c23a0904a4623ec462c3edc70c; affected 7c4fa9ebfce69619d132fe703dc2e2cf62a13723 before 12af328d2ee8d68e81ba612246d0b54b22d23e1f; affected 5cc9745e2ea11aef7d5c9a42bc36f6cd3e1b4cc3 before fb49099206c5c57af28a157249fa7bcb5518f99e; affected 56e69e59751d20993f243fb7dd6991c4e522424c before 9442d75429b0c556292a7454fe888d54259f5240; affected 56e69e59751d20993f243fb7dd6991c4e522424c before 335202ab25b01fdd45889ff25eab70864686dea3; affected 56e69e59751d20993f243fb7dd6991c4e522424c before be87de7789a82a030a4896bc7683415ec9fa6f2b; affected 56e69e59751d20993f243fb7dd6991c4e522424c before 5f0419457f89dce1a3f1c8e62a3adf2f39ab8168; affected 097420e48e30f51e8f4f650b5c946f5af63ec1a3; affected 5def895b42ef16a2da6402818cba8d7ec8ede1ef; affected 05fb2bf477d3fe5421bd4cb699574737f52bd88b; affected 5.10.224 before 5.10.261; affected 5.15.165 before 5.15.212; affected 6.1.105 before 6.1.178; affected 6.6.46 before 6.6.145; affected 4.19.320 before 4.20; affected 5.4.282 before 5.5; affected 6.10.5 before 6.11 |
| Linux / Linux | affected 6.11; unaffected 0 before 6.11; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/fdd6229d2ae9914c1f25d1041db0f4f312a4fa76
- https://git.kernel.org/stable/c/b54aee5652fcd7c23a0904a4623ec462c3edc70c
- https://git.kernel.org/stable/c/12af328d2ee8d68e81ba612246d0b54b22d23e1f
- https://git.kernel.org/stable/c/fb49099206c5c57af28a157249fa7bcb5518f99e
- https://git.kernel.org/stable/c/9442d75429b0c556292a7454fe888d54259f5240
- https://git.kernel.org/stable/c/335202ab25b01fdd45889ff25eab70864686dea3
- https://git.kernel.org/stable/c/be87de7789a82a030a4896bc7683415ec9fa6f2b
- https://git.kernel.org/stable/c/5f0419457f89dce1a3f1c8e62a3adf2f39ab8168
ADP enrichment
No English description supplied.
No references supplied.