7.8

CVE-2024-38555

net/mlx5: Discard command completions in internal error

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
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.10.20 < 5.10.219
Linux ≫ Linux Kernel Version >= 5.12 < 5.15.161
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.93
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.33
Linux ≫ Linux Kernel Version >= 6.7 < 6.8.12
Linux ≫ Linux Kernel Version >= 6.9 < 6.9.3
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.26% 0.169
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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