Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 before 2423a05dd0f21330c47ce0ae1cb54a8b0be821e2; affected 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 before 472df1d103dbe3e9d09156f0667e36180e912c46; affected 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 before 5d5fbfbbacd1efb13a9bf91317d4fde859ede4b9 |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.