CVE-2026-63902
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)
USB: serial: cypress_m8: validate interrupt packet headers
In the Linux kernel, the following vulnerability has been resolved: USB: serial: cypress_m8: validate interrupt packet headers cypress_read_int_callback() parses the interrupt-in buffer according to the selected Cypress packet format. Format 1 has a two-byte status/count header and format 2 has a one-byte combined status/count header. The usb-serial core sizes the interrupt-in buffer from the endpoint descriptor's wMaxPacketSize, and successful interrupt transfers can complete short when URB_SHORT_NOT_OK is not set. Check that the completed packet contains the selected header before reading it. Malformed short reports are ignored and the interrupt URB is resubmitted through the existing retry path, preventing out-of-bounds header-byte reads. KASAN report as below: KASAN slab-out-of-bounds in cypress_read_int_callback+0x240/0x7f0 Read of size 1 Call trace: cypress_read_int_callback() (drivers/usb/serial/cypress_m8.c:1009) __usb_hcd_giveback_urb() dummy_timer() [ johan: use constants in header length sanity checks ]
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) |
|---|---|---|---|---|---|
| 3416eaa1f8f8d516b77de514e14cf8da256d28fb | affected | git | fcef31a5a85ccf3c313449a866ec6ed7e4132425 | Unavailable | None listed |
| 3416eaa1f8f8d516b77de514e14cf8da256d28fb | affected | git | aaa66708bfb1dca2acd219d1c1582f9f6d5492cb | Unavailable | None listed |
| 3416eaa1f8f8d516b77de514e14cf8da256d28fb | affected | git | 44f9bab8df7750a1e2a4d6cc22d7c9c2dc096aed | Unavailable | None listed |
| 3416eaa1f8f8d516b77de514e14cf8da256d28fb | affected | git | be50533fe7068e86eb7adb81988e6d6a3f6dfe53 | Unavailable | None listed |
| 3416eaa1f8f8d516b77de514e14cf8da256d28fb | affected | git | 90664556916de22467097d4c8ceb716d597a5c32 | Unavailable | None listed |
| 3416eaa1f8f8d516b77de514e14cf8da256d28fb | affected | git | ae03453f2c809ca3cf73753269fa6184dea7160f | Unavailable | None listed |
| 3416eaa1f8f8d516b77de514e14cf8da256d28fb | affected | git | 4a4cb0021ebe1fcadb52e04d19ed8d71470a530b | Unavailable | None listed |
| 3416eaa1f8f8d516b77de514e14cf8da256d28fb | affected | git | 9f9bfc80c67f35a275820da7e83a35dface08281 | 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) |
|---|---|---|---|---|---|
| 2.6.26 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.26 | Unavailable | None listed |
| 5.10.259 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.210 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.176 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.143 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.93 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.35 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.12 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |