mtd: spi-nor: swp: Improve locking user experience
Summary
| CVE | CVE-2026-72155 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:21:33 UTC |
| Updated | 2026-08-23 13:16:40 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: mtd: spi-nor: swp: Improve locking user experience In the case of the first block being locked (or the few first blocks), if the user want to fully unlock the device it has two possibilities: - either it asks to unlock the entire device, and this works; - or it asks to unlock just the block(s) that are currently locked, which fails. It fails because the conditions "can_be_top" and "can_be_bottom" are true. Indeed, in this case, we unlock everything, so the TB bit does not matter. However in the current implementation, use_top would be true (as this is the favourite option) and lock_len, which in practice should be reduced down to 0, is set to "nor->params->size - (ofs + len)" which is a positive number. This is wrong. An easy way is to simply add an extra condition. In the unlock() path, if we can achieve the same result from both sides, it means we unlock everything and lock_len must simply be 0. A comment is added to clarify that logic. |
Risk And Classification
EPSS: 0.002060000 probability, percentile 0.109170000 (date 2026-08-23)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 3dd8012a8eeb3702fa17450ec1a16a3f38af138d 23c285be8f6fcde9088fe12bb69c701d46696be1 git | Not specified |
| CNA | Linux | Linux | affected 3dd8012a8eeb3702fa17450ec1a16a3f38af138d a6fd2145c73b80bb6a5eed7355a4f63597d712d9 git | Not specified |
| CNA | Linux | Linux | affected 3dd8012a8eeb3702fa17450ec1a16a3f38af138d 9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a git | Not specified |
| CNA | Linux | Linux | affected 3dd8012a8eeb3702fa17450ec1a16a3f38af138d dc341272cf8e15a2c511db3c4df5dab8adf70ad0 git | Not specified |
| CNA | Linux | Linux | affected 3dd8012a8eeb3702fa17450ec1a16a3f38af138d 6110ab5ffd84e8daa654652446a03ce2f77580a7 git | Not specified |
| CNA | Linux | Linux | affected 3dd8012a8eeb3702fa17450ec1a16a3f38af138d c0806df5cf806545160f3fdac3c888926ceac557 git | Not specified |
| CNA | Linux | Linux | affected 3dd8012a8eeb3702fa17450ec1a16a3f38af138d 12d4d69221159e6d0e72400ec81195d691169b53 git | Not specified |
| CNA | Linux | Linux | affected 3dd8012a8eeb3702fa17450ec1a16a3f38af138d e1d456b26bf23e30db305a6184e8abd9ab68bbf2 git | Not specified |
| CNA | Linux | Linux | affected 4.6 | Not specified |
| CNA | Linux | Linux | unaffected 4.6 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.266 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.217 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.97 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/23c285be8f6fcde9088fe12bb69c701d46696be1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e1d456b26bf23e30db305a6184e8abd9ab68bbf2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c0806df5cf806545160f3fdac3c888926ceac557 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a6fd2145c73b80bb6a5eed7355a4f63597d712d9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/12d4d69221159e6d0e72400ec81195d691169b53 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6110ab5ffd84e8daa654652446a03ce2f77580a7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/dc341272cf8e15a2c511db3c4df5dab8adf70ad0 | 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.