ghsa-6qcc-hqxv-5rww
Vulnerability from github
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).
{
"affected": [],
"aliases": [
"CVE-2023-54156"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-24T13:16:17Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsfc: fix crash when reading stats while NIC is resetting\n\nefx_net_stats() (.ndo_get_stats64) can be called during an ethtool\n selftest, during which time nic_data-\u003emc_stats is NULL as the NIC has\n been fini\u0027d. In this case do not attempt to fetch the latest stats\n from the hardware, else we will crash on a NULL dereference:\n BUG: kernel NULL pointer dereference, address: 0000000000000038\n RIP efx_nic_update_stats\n abridged calltrace:\n efx_ef10_update_stats_pf\n efx_net_stats\n dev_get_stats\n dev_seq_printf_stats\nSkipping the read is safe, we will simply give out stale stats.\nTo ensure that the free in efx_ef10_fini_nic() does not race against\n efx_ef10_update_stats_pf(), which could cause a TOCTTOU bug, take the\n efx-\u003estats_lock in fini_nic (it is already held across update_stats).",
"id": "GHSA-6qcc-hqxv-5rww",
"modified": "2025-12-24T15:30:40Z",
"published": "2025-12-24T15:30:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54156"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/446f5567934331923d0aec4ce045e4ecb0174aae"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/470152d76b3ed107d172ea46acc4bfa941f20b4b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/91f4ef204e731565afdc6c2a7fcf509a3fd6fd67"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aba32b4c58112960c0c708703ca6b44dc8944082"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cb1aa7cc562cab6a87ea33574c8c65f2d2fd7aeb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d1b355438b8325a486f087e506d412c4e852f37b"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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