{"id":"CVE-2026-98724","summary":"nvmet: pci-epf: reject too-short SGL segments","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: pci-epf: reject too-short SGL segments\n\nThe host controls an SGL segment's length. A nonzero length smaller than\none SGL descriptor makes nr_descs zero, so\nnvmet_pci_epf_get_sgl_segment() reads the type byte of sgls[-1] outside\nthe allocated buffer. If that byte contains a segment descriptor type,\nthe function also copies the preceding 16 bytes and returns a negative\ndescriptor count.\n\nThe read was reproduced in 3/3 KASAN boots with only the host transfer\nmocked by a KUnit test:\n\n  BUG: KASAN: slab-out-of-bounds in nvmet_pci_epf_get_sgl_segment\n  Read of size 1 by task kunit_try_catch\n  Call Trace:\n   nvmet_pci_epf_get_sgl_segment\n   nvmet_pci_epf_short_sgl_test\n  Kernel panic - not syncing: KASAN: panic_on_warn set ...\n\nReject segments that cannot hold one descriptor before allocating or\ntransferring their contents.","modified":"2026-10-20T02:30:25.932118559Z","published":"2026-10-18T15:47:01.614Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98724.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2423a05dd0f21330c47ce0ae1cb54a8b0be821e2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/472df1d103dbe3e9d09156f0667e36180e912c46"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d5fbfbbacd1efb13a9bf91317d4fde859ede4b9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98724.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98724"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186"},{"fixed":"2423a05dd0f21330c47ce0ae1cb54a8b0be821e2"},{"fixed":"472df1d103dbe3e9d09156f0667e36180e912c46"},{"fixed":"5d5fbfbbacd1efb13a9bf91317d4fde859ede4b9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98724.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.14.0"},{"fixed":"6.18.56"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98724.json"}}],"schema_version":"1.9.0"}