CVE-2026-23285
MediumCVSS 5.5Summary
In the Linux kernel, `drbd_request_endio()` passes `READ_COMPLETED_WITH_ERROR` to `__req_mod()` with a NULL `peer_device`, which is then dereferenced in `drbd_set_out_of_sync()`. This causes a null-pointer dereference on a local read error in DRBD.
Risk Assessment
A null-pointer dereference can cause a kernel panic and denial of service. The risk affects systems using DRBD when a local read error occurs.
Recommendation
Update the Linux kernel to a version containing the DRBD fix that obtains `peer_device` via `first_peer_device(device)`.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: drbd: fix null-pointer dereference on local read error In drbd_request_endio(), READ_COMPLETED_WITH_ERROR is passed to __req_mod() with a NULL peer_device: __req_mod(req, what, NULL, &m); The READ_COMPLETED_WITH_ERROR handler then unconditionally passes this NULL peer_device to drbd_set_out_of_sync(), which dereferences it, causing a null-pointer dereference. Fix this by obtaining the peer_device via first_peer_device(device), matching how drbd_req_destroy() handles the same situation.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS