fs/adfs: validate nzones in adfs_validate_bblk()
Summary
| CVE | CVE-2026-52992 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-06-24 17:17:10 UTC |
| Updated | 2026-06-24 17:17:10 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.001840000 probability, percentile 0.081720000 (date 2026-06-25)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab 33aafd2418a59c96c0389d47ea09026661fa9ec6 git | Not specified |
| CNA | Linux | Linux | affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab 1f0ed0f57f0fc87e46fe19a05435c214dc464be2 git | Not specified |
| CNA | Linux | Linux | affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab 6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc git | Not specified |
| CNA | Linux | Linux | affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab a11372a8b1ceaa5e950a84b3b5fbf8228f25e277 git | Not specified |
| CNA | Linux | Linux | affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab 1586bd2d2fb436a26df20a70e78b000d34a7d159 git | Not specified |
| CNA | Linux | Linux | affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de git | Not specified |
| CNA | Linux | Linux | affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab 60d82592ac8b5637fbed871381eb0a16df0a492e git | Not specified |
| CNA | Linux | Linux | affected f6f14a0d71b0773a1d4147d1a3c33d537cd213ab dd9d3e16c2d5fa166e13dce07413be51f42c8f5d git | Not specified |
| CNA | Linux | Linux | affected 5.6 | Not specified |
| CNA | Linux | Linux | unaffected 5.6 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.258 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.209 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.175 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.141 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.91 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.33 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.10 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/60d82592ac8b5637fbed871381eb0a16df0a492e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/33aafd2418a59c96c0389d47ea09026661fa9ec6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/dd9d3e16c2d5fa166e13dce07413be51f42c8f5d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1f0ed0f57f0fc87e46fe19a05435c214dc464be2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a11372a8b1ceaa5e950a84b3b5fbf8228f25e277 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1586bd2d2fb436a26df20a70e78b000d34a7d159 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.