CVE-2023-54156
sfc: fix crash when reading stats while NIC is resetting
Reported by linux · Published December 24, 2025
In the Linux kernel, the following vulnerability has been resolved: sfc: fix crash when reading stats while NIC is resetting efx_net_stats() (.ndo_get_stats64) can be called during an ethtool selftest, during which time nic_data->mc_stats is NULL as the NIC has been fini'd. In this case do not attempt to fetch the latest stats from the hardware, else we will crash on a NULL dereference: BUG: kernel NULL pointer dereference, address: 0000000000000038 RIP efx_nic_update_stats abridged calltrace: efx_ef10_update_stats_pf efx_net_stats dev_get_stats dev_seq_printf_stats Skipping the read is safe, we will simply give out stale stats. To ensure that the free in efx_ef10_fini_nic() does not race against efx_ef10_update_stats_pf(), which could cause a TOCTTOU bug, take the efx->stats_lock in fini_nic (it is already held across update_stats).
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | d3142c193dca9a2f6878f4128ce1aaf221bb3f99, d3142c193dca9a2f6878f4128ce1aaf221bb3f99, d3142c193dca9a2f6878f4128ce1aaf221bb3f99 |
| Linux | Linux | 5.9, 0, 5.10.188 |
| linux | linux_kernel | 5.9, 5.9, 5.9 |
| Linux | Linux | *, *, * |
Timeline
- Dec 24, 2025 CVE Published
- Dec 25, 2025 EPSS Score (30 in total, the first dated here)
- Jun 2, 2026 Security Advisory (85 in total, the first dated here)
- Jul 27, 2026 Coalition ESS Score
- Sep 30, 2026 CVE Updated
- Oct 2, 2026 Distribution Patch (81 in total, the first dated here)
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