CVE-2026-89621
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
HID: mcp2221: validate report size in mcp2221_raw_event()
In the Linux kernel, the following vulnerability has been resolved: HID: mcp2221: validate report size in mcp2221_raw_event() mcp2221_raw_event() never validates the size of incoming HID reports. In the MCP2221_I2C_GET_DATA path it trusts the device-supplied data[3] as the copy length without checking that 4 + data[3] bytes actually exist in the received report. A malicious or misbehaving USB device can send a short report with a large data[3], causing the memcpy to read past the valid report data in the HID transfer buffer and leak uninitialized kernel memory back to userspace through the I2C/SMBus read path. Add a minimum size check at entry and validate that the source range fits within the received report before the copy.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 67a95c21463d066060b0f66d65a75d45bb386ffb | affected | git | cb38b1f149b7143355b37e86c841acf0076e5c2a | Unavailable | None listed |
| 67a95c21463d066060b0f66d65a75d45bb386ffb | affected | git | b2c67dc0e30c308647bbd9b9e5d69a44c9d2733d | Unavailable | None listed |
| 67a95c21463d066060b0f66d65a75d45bb386ffb | affected | git | fffcfa367072628c3144cca17d2a3c3c9e50c057 | Unavailable | None listed |
| 67a95c21463d066060b0f66d65a75d45bb386ffb | affected | git | c1c508e8923911cb458234997e55b7a4b9aa066f | Unavailable | None listed |
| 67a95c21463d066060b0f66d65a75d45bb386ffb | affected | git | bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149 | Unavailable | None listed |
| 67a95c21463d066060b0f66d65a75d45bb386ffb | affected | git | 127de5919820f88a9d55e8371ad4ac49f625f4c5 | Unavailable | None listed |
| 67a95c21463d066060b0f66d65a75d45bb386ffb | affected | git | 7c18fb36708a97ff6772825cc087b6d537bbf0d5 | Unavailable | None listed |
| 67a95c21463d066060b0f66d65a75d45bb386ffb | affected | git | 2c9a6998c19503626c57a2267bf279e204113079 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.7 | Unavailable | None listed |
| 5.10.270 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.221 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.188 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.157 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.109 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.50 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.4 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |