CVE-2026-31464High· 8.1▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done() A malicious or compromised VIO server can return a num_written value in the discover targets MAD respons…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.4%
Last analysed / modified upstream
In the Linux kernel, the following vulnerability has been resolved:
scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
A malicious or compromised VIO server can return a num_written value in the discover targets MAD response that exceeds max_targets. This value is stored directly in vhost->num_targets without validation, and is then used as the loop bound in ibmvfc_alloc_targets() to index into disc_buf[], which is only allocated for max_targets entries. Indices at or beyond max_targets access kernel memory outside the DMA-coherent allocation. The out-of-bounds data is subsequently embedded in Implicit Logout and PLOGI MADs that are sent back to the VIO server, leaking kernel memory.
Fix by clamping num_written to max_targets before storing it.
Linux >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < d842348f8a00d5b1d7358f207eb34ffcf5b16df3Linux >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < a007246cb6c9ebdc93dafbf63cc2d43d98f402ccLinux >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < 394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89Linux >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < 4ed727e35b0ab17d3eeeb1e8023768396e2be161Linux >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < d1466bf991b2343cf2ba8336e440c8faf3cbb780Linux >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < 786f10b1966e485046839f992e89f2c18cbd1983Linux >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < bae4df0a643fa7f84663473aa3082a9c2ed139dbLinux >= 072b91f9c6510d0ec4a49d07dbc318760c7da7b3 < 61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362fLinux 2.6.27Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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