CVE-2026-72155
mtd: spi-nor: swp: Improve locking user experience
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.
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to include the fix for mtd: spi-nor: swp.
- Ensure unlock logic correctly handles the first locked blocks.
- Verify that lock_len is set to 0 when unlocking everything.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72155.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72155 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72155
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72155 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72155 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': '9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': 'dc341272cf8e15a2c511db3c4df5dab8adf70ad0', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': '6110ab5ffd84e8daa654652446a03ce2f77580a7', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': 'c0806df5cf806545160f3fdac3c888926ceac557', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': '12d4d69221159e6d0e72400ec81195d691169b53', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': 'e1d456b26bf23e30db305a6184e8abd9ab68bbf2', 'versionType': 'git'}], 'programFiles': ['drivers/mtd/spi-nor/swp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/mtd/spi-nor/swp.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': '9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': 'dc341272cf8e15a2c511db3c4df5dab8adf70ad0', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': '6110ab5ffd84e8daa654652446a03ce2f77580a7', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': 'c0806df5cf806545160f3fdac3c888926ceac557', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': '12d4d69221159e6d0e72400ec81195d691169b53', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': 'e1d456b26bf23e30db305a6184e8abd9ab68bbf2', 'versionType': 'git'}], 'programFiles': ['drivers/mtd/spi-nor/swp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/mtd/spi-nor/swp.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': '9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': 'dc341272cf8e15a2c511db3c4df5dab8adf70ad0', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': '6110ab5ffd84e8daa654652446a03ce2f77580a7', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': 'c0806df5cf806545160f3fdac3c888926ceac557', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': '12d4d69221159e6d0e72400ec81195d691169b53', 'versionType': 'git'}, {'status': 'affected', 'version': '3dd8012a8eeb3702fa17450ec1a16a3f38af138d', 'lessThan': 'e1d456b26bf23e30db305a6184e8abd9ab68bbf2', 'versionType': 'git'}], 'programFiles': ['drivers/mtd/spi-nor/swp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/mtd/spi-nor/swp.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/12d4d69221159e6d0e72400ec81195d691169b53 Added Reference https://git.kernel.org/stable/c/6110ab5ffd84e8daa654652446a03ce2f77580a7 Added Reference https://git.kernel.org/stable/c/9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a Added Reference https://git.kernel.org/stable/c/c0806df5cf806545160f3fdac3c888926ceac557 Added Reference https://git.kernel.org/stable/c/dc341272cf8e15a2c511db3c4df5dab8adf70ad0 Added Reference https://git.kernel.org/stable/c/e1d456b26bf23e30db305a6184e8abd9ab68bbf2