CVE-2026-46192spi: microchip-core-qspi: don't attempt to transmit during emulated read-only dual/quad operations
Updated under an hour ago ()
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It affects Linux and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: spi: microchip-core-qspi: don't attempt to transmit during emulated read-only dual/quad operations The core will deal with reads by creating clock cycles itself, there's no need to generate clock cycles by transmitting garbage data at the driver level. Further, transmitting garbage data just bricks the transfer since QSPI doesn't have a dedicated master-out line like MOSI in regular SPI. I'm not entirely sure if the transfer is bricked because of the garbage data being transmitted on the bus or because the core loses track of whether it is supposed to be sending or receiving data.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- 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
- Analyzed
- Record last updated
- Jun 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 8f9cf02c8852837923f1cdacfcc92e138513325c before ec9d0ddbde6003c303fa5e1d5cd48952852984d8; from 8f9cf02c8852837923f1cdacfcc92e138513325c before 67184f361ab4d9fac6d2b8d5fed6649d496038a4; from 8f9cf02c8852837923f1cdacfcc92e138513325c before eb56deaabf127e8985fc91fa6c97bf8a3b062844 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.17 before 6.18.30; from 6.19 before 7.0.7; 7.1; 7.1 | NVD |
References
- https://git.kernel.org/stable/c/ec9d0ddbde6003c303fa5e1d5cd48952852984d8patch
- https://git.kernel.org/stable/c/67184f361ab4d9fac6d2b8d5fed6649d496038a4patch
- https://git.kernel.org/stable/c/eb56deaabf127e8985fc91fa6c97bf8a3b062844patch
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.