CVE-2024-38555
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.26% probability · 18th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1337ec94bc5a9eed250e33f5f5c89a28a6bfabdbPatch
- https://git.kernel.org/stable/c/1d5dce5e92a70274de67a59e1e674c3267f94cd7Patch
- https://git.kernel.org/stable/c/3cb92b0ad73d3f1734e812054e698d655e9581b0Patch
- https://git.kernel.org/stable/c/7ac4c69c34240c6de820492c0a28a0bd1494265aPatch
- https://git.kernel.org/stable/c/bf8aaf0ae01c27ae3c06aa8610caf91e50393396Patch
- https://git.kernel.org/stable/c/db9b31aa9bc56ff0d15b78f7e827d61c4a096e40Patch
- https://git.kernel.org/stable/c/f6fbb8535e990f844371086ab2c1221f71f993d3Patch
- https://git.kernel.org/stable/c/1337ec94bc5a9eed250e33f5f5c89a28a6bfabdbPatch
- https://git.kernel.org/stable/c/1d5dce5e92a70274de67a59e1e674c3267f94cd7Patch
- https://git.kernel.org/stable/c/3cb92b0ad73d3f1734e812054e698d655e9581b0Patch
- https://git.kernel.org/stable/c/7ac4c69c34240c6de820492c0a28a0bd1494265aPatch
- https://git.kernel.org/stable/c/bf8aaf0ae01c27ae3c06aa8610caf91e50393396Patch
- https://git.kernel.org/stable/c/db9b31aa9bc56ff0d15b78f7e827d61c4a096e40Patch
- https://git.kernel.org/stable/c/f6fbb8535e990f844371086ab2c1221f71f993d3Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.