octeontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF

Summary

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: cn10k: restrict VF LMTLINE sharing to its own PF rvu_mbox_handler_lmtst_tbl_setup() uses req->base_pcifunc as a direct index into the LMT map table to read another function's LMTLINE physical base address and copy it into the caller's own LMT map table entry. The mailbox dispatcher authenticates req->hdr.pcifunc from the IRQ source, but req->base_pcifunc is a separate payload field and is not sanitized. Reject the request with -EPERM when a VF caller's base_pcifunc is not a valid function under its own PF. is_pf_func_valid() bounds the FUNC field to the PF's configured VF count, keeping the computed index inside the caller's own slot block.

Timeline

1. Aug 15, 2026, 5:52 AM UTCCVE published
2. Oct 16, 2026, 3:50 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 19, 2026, 9:19 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 893ae97214c385be02f8ec097298cc48c7f0d905 · fixed in 04c014e49b9f53d58a8f94adece8a0af3ae1b85c; From 893ae97214c385be02f8ec097298cc48c7f0d905 · fixed in 6967dd944be2a71eddab3a2ae1a1a4dd9e5f8eed; From 893ae97214c385be02f8ec097298cc48c7f0d905 · fixed in e9c5b03208507dd6d58b0c23a2c60b5c2f4c1b11; From 893ae97214c385be02f8ec097298cc48c7f0d905 · fixed in 54535692bec9ef464adc714108eb19e49e38b5a2; From 893ae97214c385be02f8ec097298cc48c7f0d905 · fixed in c73b8795b45f4ad5a95120d2e9b435ea4616e08e; From 893ae97214c385be02f8ec097298cc48c7f0d905 · fixed in 59da37fee81a8d76079313348ca13c5bc90dd6ae; From 893ae97214c385be02f8ec097298cc48c7f0d905 · fixed in 8cdcf3d2caacdee7ddd363705fb4d93b0c1a0915

• Linux Linux

  5.14

• KernelLinux

  From 5.14.0 · fixed in 5.15.217; From 5.16.0 · fixed in 6.1.184; From 6.2.0 · fixed in 6.6.148; From 6.7.0 · fixed in 6.12.101; From 6.13.0 · fixed in 6.18.42; From 6.19.0 · fixed in 7.1.5

References 7