CVE-2024-38555

net/mlx5: Discard command completions in internal error

State: Published
Severity: 7.0 High
Published: Jun 19, 2024
Updated: Aug 5, 2026
Reserved: Jun 18, 2024

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

Scores

CVSS	Score	Vector	Source
3.1	7.0 High	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	27c79b3a9212cf4ba634c157e07d29548181a208 to before f6fbb8535e990f844371086ab2c1221f71f993d3Affected 51d138c2610a236c1ed0059d034ee4c74f452b86 to before 3cb92b0ad73d3f1734e812054e698d655e9581b0Affected 51d138c2610a236c1ed0059d034ee4c74f452b86 to before bf8aaf0ae01c27ae3c06aa8610caf91e50393396Affected 51d138c2610a236c1ed0059d034ee4c74f452b86 to before 1337ec94bc5a9eed250e33f5f5c89a28a6bfabdbAffected 51d138c2610a236c1ed0059d034ee4c74f452b86 to before 1d5dce5e92a70274de67a59e1e674c3267f94cd7Affected 51d138c2610a236c1ed0059d034ee4c74f452b86 to before 7ac4c69c34240c6de820492c0a28a0bd1494265aAffected 51d138c2610a236c1ed0059d034ee4c74f452b86 to before db9b31aa9bc56ff0d15b78f7e827d61c4a096e40Affected 2e5d24b3bf091802c5456dc8f8f6a6be4493c8caAffected 5.10.20 to before 5.10.219Affected 5.11.3 to before 5.12Affected
LinuxLinux	5.12Affected before 5.12Not affected 5.10.219 through 5.10.Not affected 5.15.161 through 5.15.Not affected 6.1.93 through 6.1.Not affected 6.6.33 through 6.6.Not affected 6.8.12 through 6.8.Not affected 6.9.3 through 6.9.Not affected 6.10 and laterNot affected

Product

Versions

LinuxLinux

27c79b3a9212cf4ba634c157e07d29548181a208 to before f6fbb8535e990f844371086ab2c1221f71f993d3Affected
51d138c2610a236c1ed0059d034ee4c74f452b86 to before 3cb92b0ad73d3f1734e812054e698d655e9581b0Affected
51d138c2610a236c1ed0059d034ee4c74f452b86 to before bf8aaf0ae01c27ae3c06aa8610caf91e50393396Affected
51d138c2610a236c1ed0059d034ee4c74f452b86 to before 1337ec94bc5a9eed250e33f5f5c89a28a6bfabdbAffected
51d138c2610a236c1ed0059d034ee4c74f452b86 to before 1d5dce5e92a70274de67a59e1e674c3267f94cd7Affected
51d138c2610a236c1ed0059d034ee4c74f452b86 to before 7ac4c69c34240c6de820492c0a28a0bd1494265aAffected
51d138c2610a236c1ed0059d034ee4c74f452b86 to before db9b31aa9bc56ff0d15b78f7e827d61c4a096e40Affected
2e5d24b3bf091802c5456dc8f8f6a6be4493c8caAffected
5.10.20 to before 5.10.219Affected
5.11.3 to before 5.12Affected

LinuxLinux

5.12Affected
before 5.12Not affected
5.10.219 through 5.10.*Not affected
5.15.161 through 5.15.*Not affected
6.1.93 through 6.1.*Not affected
6.6.33 through 6.6.*Not affected
6.8.12 through 6.8.*Not affected
6.9.3 through 6.9.*Not affected
6.10 and laterNot affected

References

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