Live › vulnerability › CVE-2026-98724
Go to dashboardThe Linux kernel's NVMe PCI endpoint target driver (nvmet pci-epf) does not reject SGL segments whose length is smaller than one descriptor. A host can send such a segment to trigger an out-of-bounds read of kernel memory and a negative descriptor count.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
No product ranges from the sources yet.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
In the Linux kernel, the following vulnerability has been resolved:
nvmet: pci-epf: reject too-short SGL segments
The host controls an SGL segment's length. A nonzero length smaller than one SGL descriptor makes nr_descs zero, so nvmet_pci_epf_get_sgl_segment() reads the type byte of sgls[-1] outside the allocated buffer. If that byte contains a segment descriptor type, the function also copies the preceding 16 bytes and returns a negative descriptor count.
The read was reproduced in 3/3 KASAN boots with only the host transfer mocked by a KUnit test:
BUG: KASAN: slab-out-of-bounds in nvmet_pci_epf_get_sgl_segment Read of size 1 by task kunit_try_catch Call Trace: nvmet_pci_epf_get_sgl_segment nvmet_pci_epf_short_sgl_test Kernel panic - not syncing: KASAN: panic_on_warn set ...
Reject segments that cannot hold one descriptor before allocating or transferring their contents.
This page as .md · .json · in your agent: get_signal("CVE-2026-98724")
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.