CVE-2023-54156High· 7.8▾ TwilightIn 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_s…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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).
Linux >= d3142c193dca9a2f6878f4128ce1aaf221bb3f99 < cb1aa7cc562cab6a87ea33574c8c65f2d2fd7aebLinux >= d3142c193dca9a2f6878f4128ce1aaf221bb3f99 < 91f4ef204e731565afdc6c2a7fcf509a3fd6fd67Linux >= d3142c193dca9a2f6878f4128ce1aaf221bb3f99 < 446f5567934331923d0aec4ce045e4ecb0174aaeLinux >= d3142c193dca9a2f6878f4128ce1aaf221bb3f99 < 470152d76b3ed107d172ea46acc4bfa941f20b4bLinux >= d3142c193dca9a2f6878f4128ce1aaf221bb3f99 < aba32b4c58112960c0c708703ca6b44dc8944082Linux >= d3142c193dca9a2f6878f4128ce1aaf221bb3f99 < d1b355438b8325a486f087e506d412c4e852f37bLinux 5.9Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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