Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
072b91f9c6510d0ec4a49d07dbc318760c7da7b3 to < d842348f8a00d5b1d7358f207eb34ffcf5b16df3affected072b91f9c6510d0ec4a49d07dbc318760c7da7b3 to < a007246cb6c9ebdc93dafbf63cc2d43d98f402ccaffected072b91f9c6510d0ec4a49d07dbc318760c7da7b3 to < 394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89affected072b91f9c6510d0ec4a49d07dbc318760c7da7b3 to < 4ed727e35b0ab17d3eeeb1e8023768396e2be161affected072b91f9c6510d0ec4a49d07dbc318760c7da7b3 to < d1466bf991b2343cf2ba8336e440c8faf3cbb780affected072b91f9c6510d0ec4a49d07dbc318760c7da7b3 to < 786f10b1966e485046839f992e89f2c18cbd1983affected072b91f9c6510d0ec4a49d07dbc318760c7da7b3 to < bae4df0a643fa7f84663473aa3082a9c2ed139dbaffected072b91f9c6510d0ec4a49d07dbc318760c7da7b3 to < 61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362faffected
Linux Linux
Default version status: affected
2.6.27affected0 to < 2.6.27unaffected5.10.253 to ≤ 5.10.*unaffected5.15.203 to ≤ 5.15.*unaffected6.1.168 to ≤ 6.1.*unaffected6.6.131 to ≤ 6.6.*unaffected6.12.80 to ≤ 6.12.*unaffected6.18.21 to ≤ 6.18.*unaffected6.19.11 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d842348f8a00d5b1d7358f207eb34ffcf5b16df3 ↗
- https://git.kernel.org/stable/c/a007246cb6c9ebdc93dafbf63cc2d43d98f402cc ↗
- https://git.kernel.org/stable/c/394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89 ↗
- https://git.kernel.org/stable/c/4ed727e35b0ab17d3eeeb1e8023768396e2be161 ↗
- https://git.kernel.org/stable/c/d1466bf991b2343cf2ba8336e440c8faf3cbb780 ↗
- https://git.kernel.org/stable/c/786f10b1966e485046839f992e89f2c18cbd1983 ↗
- https://git.kernel.org/stable/c/bae4df0a643fa7f84663473aa3082a9c2ed139db ↗
- https://git.kernel.org/stable/c/61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f ↗