Answer in brief
CVE-2026-80886 records a Unknown severity vulnerability in serial: msm: Disable DMA for kernel console UART. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 <f58e568dc308c8e13f7730c8de2da5ed514e540d || >=3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 <bb4296de5b538b575978c588cb3738ab8524d01a || >=3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 <6acea62738ed4cae6746483026706a773b44dad7 || >=3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 <abc1926c88c189e5d698b91ed6890e09ab5c321d || >=3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 <2727744ccb5ca59090451451ee94f530b1be04a5 || >=3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 <d354716245192de2d203f2b35f22ab8dc13595e2 || >=3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 <e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47 || >=3a878c430fd6eb4f8587f9ebd187f773bf85d1d6 <22dd2777e6c180e1c945b00f6d18550979436324 | f58e568dc308c8e13f7730c8de2da5ed514e540d, bb4296de5b538b575978c588cb3738ab8524d01a, 6acea62738ed4cae6746483026706a773b44dad7, abc1926c88c189e5d698b91ed6890e09ab5c321d, 2727744ccb5ca59090451451ee94f530b1be04a5, d354716245192de2d203f2b35f22ab8dc13595e2, e3b42e326f4f30efcdc90bad5f5ba37e1cd91a47, 22dd2777e6c180e1c945b00f6d18550979436324 |
| Linux/Linuxgeneric | 4.4 | Not reported |
Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 4, 2026
In the Linux kernel, the following vulnerability has been resolved: serial: msm: Disable DMA for kernel console UART At the moment, concurrent writes from userspace and the kernel to the console can trigger a race condition that results in an infinite loop of the same messages printed over and over again. This is most likely to happen during system startup or shutdown when the init system starts/stops a large number of system services that interact with various kernel code. When userspace writes to the TTY device, the driver initiates an asynchronous DMA transfer and releases the port lock. At the same moment, the kernel printk path might grab the port lock and re-configure the UART controller for PIO, without waiting for the DMA operation to complete. It seems like this collision results in zero progress being reported for the DMA engine, so the same text is printed to the console over and over again. For the kernel console, we want a reliable output path that will be functional even during crashes etc. So rather than implementing complex code to synchronize the kernel console write routines with the userspace DMA write routines, simply disable DMA for the console UART instance. Similar checks exist in many other serial drivers, e.g. 8250_port.c, imx.c, sh-sci.c etc.
Quoted source text, attributed separately from HOL analysis.