CVE-2026-72155mtd: spi-nor: swp: Improve locking user experience
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 3dd8012a8eeb3702fa17450ec1a16a3f38af138d before 23c285be8f6fcde9088fe12bb69c701d46696be1; from 3dd8012a8eeb3702fa17450ec1a16a3f38af138d before a6fd2145c73b80bb6a5eed7355a4f63597d712d9; from 3dd8012a8eeb3702fa17450ec1a16a3f38af138d before 9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a; from 3dd8012a8eeb3702fa17450ec1a16a3f38af138d before dc341272cf8e15a2c511db3c4df5dab8adf70ad0; from 3dd8012a8eeb3702fa17450ec1a16a3f38af138d before 6110ab5ffd84e8daa654652446a03ce2f77580a7; from 3dd8012a8eeb3702fa17450ec1a16a3f38af138d before c0806df5cf806545160f3fdac3c888926ceac557; from 3dd8012a8eeb3702fa17450ec1a16a3f38af138d before 12d4d69221159e6d0e72400ec81195d691169b53; from 3dd8012a8eeb3702fa17450ec1a16a3f38af138d before e1d456b26bf23e30db305a6184e8abd9ab68bbf2 | CNA record |
References
- https://git.kernel.org/stable/c/23c285be8f6fcde9088fe12bb69c701d46696be1
- https://git.kernel.org/stable/c/a6fd2145c73b80bb6a5eed7355a4f63597d712d9
- https://git.kernel.org/stable/c/9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a
- https://git.kernel.org/stable/c/dc341272cf8e15a2c511db3c4df5dab8adf70ad0
- https://git.kernel.org/stable/c/6110ab5ffd84e8daa654652446a03ce2f77580a7
- https://git.kernel.org/stable/c/c0806df5cf806545160f3fdac3c888926ceac557
- https://git.kernel.org/stable/c/12d4d69221159e6d0e72400ec81195d691169b53
- https://git.kernel.org/stable/c/e1d456b26bf23e30db305a6184e8abd9ab68bbf2
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.