Answer in brief
CVE-2026-80827 records a Unknown severity vulnerability in USB: serial: option: fix slab OOB read in interrupt URB callback. 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 | >=58cfe9113e485f7e04bd0eac4fc4251b330af501 <fbe60fd2abc8a5561f39719a41ad9a01b5d8e567 || >=58cfe9113e485f7e04bd0eac4fc4251b330af501 <94e5525697b9e91ddc4071129874120a50a4f342 || >=58cfe9113e485f7e04bd0eac4fc4251b330af501 <6b8cf5422c7e96ed5b22a8368eff663f3f98b8ec || >=58cfe9113e485f7e04bd0eac4fc4251b330af501 <030e3a73d3c3aa67c44454649e984d6383cdb7d3 || >=58cfe9113e485f7e04bd0eac4fc4251b330af501 <060db7d48af1e650643c8b8319111a9ea2ce4486 || >=58cfe9113e485f7e04bd0eac4fc4251b330af501 <2ef5560387f2c0713cee975be2b24b281bd90f3e || >=58cfe9113e485f7e04bd0eac4fc4251b330af501 <a72a13c83a652516a0e469d275b81d29a7429049 || >=58cfe9113e485f7e04bd0eac4fc4251b330af501 <d762aef4eba354066be21a5d88eb2066e282f4c9 || >=58cfe9113e485f7e04bd0eac4fc4251b330af501 <885d802f544ca7bfa8f3984d94233cce715bb6b3 | fbe60fd2abc8a5561f39719a41ad9a01b5d8e567, 94e5525697b9e91ddc4071129874120a50a4f342, 6b8cf5422c7e96ed5b22a8368eff663f3f98b8ec, 030e3a73d3c3aa67c44454649e984d6383cdb7d3, 060db7d48af1e650643c8b8319111a9ea2ce4486, 2ef5560387f2c0713cee975be2b24b281bd90f3e, a72a13c83a652516a0e469d275b81d29a7429049, d762aef4eba354066be21a5d88eb2066e282f4c9, 885d802f544ca7bfa8f3984d94233cce715bb6b3 |
| Linux/Linuxgeneric | 2.6.12 | 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: USB: serial: option: fix slab OOB read in interrupt URB callback The interrupt URB buffer is allocated in setup_port_interrupt_in() based on the endpoint's wMaxPacketSize: buffer_size = usb_endpoint_maxp(epd); port->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL); When a USB device declares wMaxPacketSize = 8 on its interrupt IN endpoint, the buffer is allocated from kmalloc-8 cache (exactly 8 bytes). If the device sends a short packet (actual_length < wMaxPacketSize), the URB completes with status == 0 and the callback proceeds to read: data[sizeof(struct usb_ctrlrequest)] which evaluates to data[8], accessing 1 byte beyond the allocated 8-byte buffer. This results in a slab out-of-bounds read. Fix this by adding the missing bounds check: first verify that the actual length is large enough to contain the struct usb_ctrlrequest header before accessing req_pkt->bRequestType and req_pkt->bRequest, and then verify that there is an additional byte for the modem signal state before reading data[sizeof(struct usb_ctrlrequest)] inside the conditional. Use sizeof(*req_pkt) instead of sizeof(struct usb_ctrlrequest) for consistency. [ johan: use dev_err(); split signals declaration and initialisation ]
Quoted source text, attributed separately from HOL analysis.