https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Sun, 04 Oct 2026 13:49:46 +0000 https://vulnerability.circl.lu/vuln/cve-2021-47556 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>ethtool: ioctl: fix potential NULL deref in ethtool_set_coalesce()</p> <p>ethtool_set_coalesce() now uses both the .get_coalesce() and .set_coalesce() callbacks. But the check for their availability is buggy, so changing the coalesce settings on a device where the driver provides only _one_ of the callbacks results in a NULL pointer dereference instead of an -EOPNOTSUPP.</p> <p>Fix the condition so that the availability of both callbacks is ensured. This also matches the netlink code.</p> <p>Note that reproducing this requires some effort - it only affects the legacy ioctl path, and needs a specific combination of driver options: - have .get_coalesce() and .coalesce_supported but no .set_coalesce(), or - have .set_coalesce() but no .get_coalesce(). Here eg. ethtool doesn&#39;t cause the crash as it first attempts to call ethtool_get_coalesce() and bails out on error.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>ethtool: ioctl: fix potential NULL deref in ethtool_set_coalesce()</p> <p>ethtool_set_coalesce() now uses both the .get_coalesce() and .set_coalesce() callbacks. But the check for their availability is buggy, so changing the coalesce settings on a device where the driver provides only _one_ of the callbacks results in a NULL pointer dereference instead of an -EOPNOTSUPP.</p> <p>Fix the condition so that the availability of both callbacks is ensured. This also matches the netlink code.</p> <p>Note that reproducing this requires some effort - it only affects the legacy ioctl path, and needs a specific combination of driver options: - have .get_coalesce() and .coalesce_supported but no .set_coalesce(), or - have .set_coalesce() but no .get_coalesce(). Here eg. ethtool doesn&#39;t cause the crash as it first attempts to call ethtool_get_coalesce() and bails out on error.</p> https://vulnerability.circl.lu/vuln/cve-2021-47556