mmc: core: Avoid negative index with array access

Summary

In the Linux kernel, the following vulnerability has been resolved: mmc: core: Avoid negative index with array access Commit 4d0c8d0aef63 ("mmc: core: Use mrq.sbc in close-ended ffu") assigns prev_idata = idatas[i - 1], but doesn't check that the iterator i is greater than zero. Let's fix this by adding a check.

Timeline

1. May 17, 2024, 1:23 PM UTCCVE published
2. Jun 17, 2024, 5:39 PM UTCCISA SSVC assessment

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

3. Oct 15, 2026, 12:40 AM UTCRecord last updated

Affected versions

• Linux Linux

  From f49f9e802785291149bdc9c824414de4604226b4 · fixed in b9a7339ae403035ffe7fc37cb034b36947910f68; From 59020bf0999ff7da8aedcd00ef8f0d75d93b6d20 · fixed in 2b539c88940e22494da80a93ee1c5a28bbad10f6; From 50b8b7a22e90bab9f1949b64a88ff17ab10913ec · fixed in 81b8645feca08a54c7c4bf36e7b176f4983b2f28; From c4edcd134bb72b3b0acc884612d624e48c9d057f · fixed in ad9cc5e9e53ab94aa0c7ac65d43be7eb208dcb55; From 1653a8102868264f3488c298a9f20af2add9a288 · fixed in 4466677dcabe2d70de6aa3d4bd4a4fafa94a71f2; From eed9119f8f8e8fbf225c08abdbb58597fba807e0 · fixed in 064db53f9023a2d5877a2d12de6bc27995f6ca56; From 4d0c8d0aef6355660b6775d57ccd5d4ea2e15802 · fixed in 7d0e8a6147550aa058fa6ade8583ad252aa61304; From 4d0c8d0aef6355660b6775d57ccd5d4ea2e15802 · fixed in cf55a7acd1ed38afe43bba1c8a0935b51d1dc014; From 5.4.269 · fixed in 5.4.274; From 5.10.210 · fixed in 5.10.215; From 5.15.149 · fixed in 5.15.154; From 6.1.76 · fixed in 6.1.84; From 6.6.15 · fixed in 6.6.24; From 6.7.3 · fixed in 6.7.12

• Linux Linux

  6.8

• KernelLinux

  fixed in 5.4.274; From 5.5.0 · fixed in 5.10.215; From 5.11.0 · fixed in 5.15.154; From 5.16.0 · fixed in 6.1.84; From 6.2.0 · fixed in 6.6.24; From 6.7.0 · fixed in 6.7.12; From 6.8.0 · fixed in 6.8.3

References 8