CVE-2026-64270
Input: mms114 - reject an oversized device packet size
Description
In the Linux kernel, the following vulnerability has been resolved: Input: mms114 - reject an oversized device packet size mms114_interrupt() reads a packet of touch data from the device into a fixed-size on-stack buffer struct mms114_touch touch[MMS114_MAX_TOUCH]; which holds MMS114_MAX_TOUCH (10) events of MMS114_EVENT_SIZE (8) bytes, i.e. 80 bytes. The length of the I2C read into it is taken verbatim from the device: packet_size = mms114_read_reg(data, MMS114_PACKET_SIZE); if (packet_size <= 0) goto out; ... error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size, (u8 *)touch); packet_size is a single device register byte (0x0F) and the only check is the lower bound packet_size <= 0; it is never bounded against the size of touch[]. A malfunctioning, malicious or counterfeit controller (or an attacker tampering with the I2C bus) can report a packet_size of up to 255, so __mms114_read_reg() writes up to 175 bytes past the end of touch[] on the IRQ-thread stack: a stack out-of-bounds write that can overwrite the stack canary, saved registers and the return address. A well-formed device never reports more than the buffer holds, so reject an oversized packet and drop the report, consistent with the handler's other error paths, rather than reading past the buffer.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
Aug. 17, 2026, 5:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Validate packet size against buffer capacity.
- Reject oversized packets to prevent buffer overflow.
- Apply the provided patch to the Linux kernel.
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-2026-64270.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64270 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-2026-64270
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-2026-64270 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64270 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': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': '5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': 'b78150729762d47c14fe29a2582bdca5568e62b8', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': '8301c335305344d4da4ab9442b6a399dacfe5b8d', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': 'f3d5e77b27fded71dcb97f409262bf0abba0410e', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': '66725039f7090afe14c31bd259e2059a68f04023', 'versionType': 'git'}], 'programFiles': ['drivers/input/touchscreen/mms114.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/input/touchscreen/mms114.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': '5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': 'b78150729762d47c14fe29a2582bdca5568e62b8', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': '8301c335305344d4da4ab9442b6a399dacfe5b8d', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': 'f3d5e77b27fded71dcb97f409262bf0abba0410e', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': '66725039f7090afe14c31bd259e2059a68f04023', 'versionType': 'git'}], 'programFiles': ['drivers/input/touchscreen/mms114.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/input/touchscreen/mms114.c'], 'defaultStatus': 'affected'}] -
Initial Analysis by [email protected]
Aug. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-787 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.96 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.39 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.1.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.6 up to (excluding) 6.6.145 Added Reference Type kernel.org: https://git.kernel.org/stable/c/5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/66725039f7090afe14c31bd259e2059a68f04023 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/8301c335305344d4da4ab9442b6a399dacfe5b8d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b78150729762d47c14fe29a2582bdca5568e62b8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f3d5e77b27fded71dcb97f409262bf0abba0410e Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 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': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': '5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': 'b78150729762d47c14fe29a2582bdca5568e62b8', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': '8301c335305344d4da4ab9442b6a399dacfe5b8d', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': 'f3d5e77b27fded71dcb97f409262bf0abba0410e', 'versionType': 'git'}, {'status': 'affected', 'version': '07b8481d4aff73d6f451f25e74ea10240ff5131e', 'lessThan': '66725039f7090afe14c31bd259e2059a68f04023', 'versionType': 'git'}], 'programFiles': ['drivers/input/touchscreen/mms114.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/input/touchscreen/mms114.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: Input: mms114 - reject an oversized device packet size mms114_interrupt() reads a packet of touch data from the device into a fixed-size on-stack buffer struct mms114_touch touch[MMS114_MAX_TOUCH]; which holds MMS114_MAX_TOUCH (10) events of MMS114_EVENT_SIZE (8) bytes, i.e. 80 bytes. The length of the I2C read into it is taken verbatim from the device: packet_size = mms114_read_reg(data, MMS114_PACKET_SIZE); if (packet_size <= 0) goto out; ... error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size, (u8 *)touch); packet_size is a single device register byte (0x0F) and the only check is the lower bound packet_size <= 0; it is never bounded against the size of touch[]. A malfunctioning, malicious or counterfeit controller (or an attacker tampering with the I2C bus) can report a packet_size of up to 255, so __mms114_read_reg() writes up to 175 bytes past the end of touch[] on the IRQ-thread stack: a stack out-of-bounds write that can overwrite the stack canary, saved registers and the return address. A well-formed device never reports more than the buffer holds, so reject an oversized packet and drop the report, consistent with the handler's other error paths, rather than reading past the buffer. Added Reference https://git.kernel.org/stable/c/5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6 Added Reference https://git.kernel.org/stable/c/66725039f7090afe14c31bd259e2059a68f04023 Added Reference https://git.kernel.org/stable/c/8301c335305344d4da4ab9442b6a399dacfe5b8d Added Reference https://git.kernel.org/stable/c/b78150729762d47c14fe29a2582bdca5568e62b8 Added Reference https://git.kernel.org/stable/c/f3d5e77b27fded71dcb97f409262bf0abba0410e