CVE-2024-38555

Summary

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: Discard command completions in internal error

Fix use after free when FW completion arrives while device is in internal error state. Avoid calling completion handler in this case, since the device will flush the command interface and trigger all completions manually.

Kernel log: ————[ cut here ]———— refcount_t: underflow; use-after-free. … RIP: 0010:refcount_warn_saturate+0xd8/0xe0 … Call Trace: <IRQ> ? __warn+0x79/0x120 ? refcount_warn_saturate+0xd8/0xe0 ? report_bug+0x17c/0x190 ? handle_bug+0x3c/0x60 ? exc_invalid_op+0x14/0x70 ? asm_exc_invalid_op+0x16/0x20 ? refcount_warn_saturate+0xd8/0xe0 cmd_ent_put+0x13b/0x160 [mlx5_core] mlx5_cmd_comp_handler+0x5f9/0x670 [mlx5_core] cmd_comp_notifier+0x1f/0x30 [mlx5_core] notifier_call_chain+0x35/0xb0 atomic_notifier_call_chain+0x16/0x20 mlx5_eq_async_int+0xf6/0x290 [mlx5_core] notifier_call_chain+0x35/0xb0 atomic_notifier_call_chain+0x16/0x20 irq_int_handler+0x19/0x30 [mlx5_core] __handle_irq_event_percpu+0x4b/0x160 handle_irq_event+0x2e/0x80 handle_edge_irq+0x98/0x230 __common_interrupt+0x3b/0xa0 common_interrupt+0x7b/0xa0 </IRQ> <TASK> asm_common_interrupt+0x22/0x40

Affected Software

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

• https://git.kernel.org/stable/c/f6fbb8535e990f844371086ab2c1221f71f993d3
• https://git.kernel.org/stable/c/3cb92b0ad73d3f1734e812054e698d655e9581b0
• https://git.kernel.org/stable/c/bf8aaf0ae01c27ae3c06aa8610caf91e50393396
• https://git.kernel.org/stable/c/1337ec94bc5a9eed250e33f5f5c89a28a6bfabdb
• https://git.kernel.org/stable/c/1d5dce5e92a70274de67a59e1e674c3267f94cd7
• https://git.kernel.org/stable/c/7ac4c69c34240c6de820492c0a28a0bd1494265a
• https://git.kernel.org/stable/c/db9b31aa9bc56ff0d15b78f7e827d61c4a096e40

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://git.kernel.org/stable/c/f6fbb8535e990f844371086ab2c1221f71f993d3
• https://git.kernel.org/stable/c/3cb92b0ad73d3f1734e812054e698d655e9581b0
• https://git.kernel.org/stable/c/bf8aaf0ae01c27ae3c06aa8610caf91e50393396
• https://git.kernel.org/stable/c/1337ec94bc5a9eed250e33f5f5c89a28a6bfabdb
• https://git.kernel.org/stable/c/1d5dce5e92a70274de67a59e1e674c3267f94cd7
• https://git.kernel.org/stable/c/7ac4c69c34240c6de820492c0a28a0bd1494265a
• https://git.kernel.org/stable/c/db9b31aa9bc56ff0d15b78f7e827d61c4a096e40

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