Answer in brief
CVE-2026-46151 records a Unknown severity vulnerability in usb: usblp: fix heap leak in IEEE 1284 device ID via short response. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4650cce898fcd0bb8c33e529984687a8caed10c3 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <612640abbd9e0947fe8f37aaf0cf324265d7caa4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4220d4dd062ea3d3eb056a6cbe0b568e740d20b1 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6e29c32a27218f2dcd4a4e9b0b3c5e7728640698 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6d8142141c942c0d8e79343cffda9c44bb1f3f4f || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8247f52d822180e94ccbfdab91613af386a4e34d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <522d17e93a85575256894212d10e5a1fa6f36529 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7a400c6fe3617e31e690e3f7ca37bb335e0498f3 | 4650cce898fcd0bb8c33e529984687a8caed10c3, 612640abbd9e0947fe8f37aaf0cf324265d7caa4, 4220d4dd062ea3d3eb056a6cbe0b568e740d20b1, 6e29c32a27218f2dcd4a4e9b0b3c5e7728640698, 6d8142141c942c0d8e79343cffda9c44bb1f3f4f, 8247f52d822180e94ccbfdab91613af386a4e34d, 522d17e93a85575256894212d10e5a1fa6f36529, 7a400c6fe3617e31e690e3f7ca37bb335e0498f3 |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
May 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
In the Linux kernel, the following vulnerability has been resolved: usb: usblp: fix heap leak in IEEE 1284 device ID via short response usblp_ctrl_msg() collapses the usb_control_msg() return value to 0/-errno, discarding the actual number of bytes transferred. A broken printer can complete the GET_DEVICE_ID control transfer short and the driver has no way to know. usblp_cache_device_id_string() reads the 2-byte big-endian length prefix from the response and trusts it (clamped only to the buffer bounds). The buffer is kmalloc(1024) at probe time. A device that sends exactly two bytes (e.g. 0x03 0xFF, claiming a 1023-byte ID) leaves device_id_string[2..1022] holding stale kmalloc heap. That stale data is then exposed: - via the ieee1284_id sysfs attribute (sprintf("%s", buf+2), truncated at the first NUL in the stale heap), and - via the IOCNR_GET_DEVICE_ID ioctl, which copy_to_user()s the full claimed length regardless of NULs, up to 1021 bytes of uninitialized heap, with the leak size chosen by the device. Fix this up by just zapping the buffer with zeros before each request sent to the device.
Quoted source text, attributed separately from HOL analysis.