Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: fs/adfs: validate nzones in adfs_validate_bblk() Reject ADFS disc records with a zero zone count during boot block validation, before the disc record is used. When nzones is 0, adfs_read_map() passes it to kmalloc_array(0, ...) which returns ZERO_SIZE_PTR, and adfs_map_layout() then writes to dm[-1], causing an out-of-bounds write before the allocated buffer. adfs_validate_dr0() already rejects nzones != 1 for old-format images. Add the equivalent check to adfs_validate_bblk() for new-format images so that a crafted image with nzones == 0 is rejected at probe time. Found by syzkaller.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab before 33aafd2418a59c96c0389d47ea09026661fa9ec6; affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab before 1f0ed0f57f0fc87e46fe19a05435c214dc464be2; affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab before 6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc; affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab before a11372a8b1ceaa5e950a84b3b5fbf8228f25e277; affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab before 1586bd2d2fb436a26df20a70e78b000d34a7d159; affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab before a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de; affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab before 60d82592ac8b5637fbed871381eb0a16df0a492e; affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab before dd9d3e16c2d5fa166e13dce07413be51f42c8f5d |
| Linux / Linux | affected 5.6; unaffected 0 before 5.6; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.141 through 6.6.*; unaffected 6.12.91 through 6.12.*; unaffected 6.18.33 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/33aafd2418a59c96c0389d47ea09026661fa9ec6
- https://git.kernel.org/stable/c/1f0ed0f57f0fc87e46fe19a05435c214dc464be2
- https://git.kernel.org/stable/c/6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc
- https://git.kernel.org/stable/c/a11372a8b1ceaa5e950a84b3b5fbf8228f25e277
- https://git.kernel.org/stable/c/1586bd2d2fb436a26df20a70e78b000d34a7d159
- https://git.kernel.org/stable/c/a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de
- https://git.kernel.org/stable/c/60d82592ac8b5637fbed871381eb0a16df0a492e
- https://git.kernel.org/stable/c/dd9d3e16c2d5fa166e13dce07413be51f42c8f5d