CVE - CVE-2021-47388

CVE-ID
CVE-2021-47388	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: mac80211: fix use-after-free in CCMP/GCMP RX When PN checking is done in mac80211, for fragmentation we need to copy the PN to the RX struct so we can later use it to do a comparison, since commit bf30ca922a0c ("mac80211: check defrag PN against current frame"). Unfortunately, in that commit I used the 'hdr' variable without it being necessarily valid, so use-after-free could occur if it was necessary to reallocate (parts of) the frame. Fix this by reloading the variable after the code that results in the reallocations, if any. This fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9 URL:https://git.kernel.org/stable/c/27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9 MISC:https://git.kernel.org/stable/c/31de381aef0ab1b342f62485118dc8a19363dc78 URL:https://git.kernel.org/stable/c/31de381aef0ab1b342f62485118dc8a19363dc78 MISC:https://git.kernel.org/stable/c/3d5d629c99c468458022e9b381789de3595bf4dd URL:https://git.kernel.org/stable/c/3d5d629c99c468458022e9b381789de3595bf4dd MISC:https://git.kernel.org/stable/c/447d001b875d0e7f211c4ba004916028da994258 URL:https://git.kernel.org/stable/c/447d001b875d0e7f211c4ba004916028da994258 MISC:https://git.kernel.org/stable/c/50149e0866a82cef33e680ee68dc380a5bc75d32 URL:https://git.kernel.org/stable/c/50149e0866a82cef33e680ee68dc380a5bc75d32 MISC:https://git.kernel.org/stable/c/57de2dcb18742dc2860861c9f496da7d42b67da0 URL:https://git.kernel.org/stable/c/57de2dcb18742dc2860861c9f496da7d42b67da0 MISC:https://git.kernel.org/stable/c/94513069eb549737bcfc3d988d6ed4da948a2de8 URL:https://git.kernel.org/stable/c/94513069eb549737bcfc3d988d6ed4da948a2de8 MISC:https://git.kernel.org/stable/c/f556e1d6fb9f2923a9a36f3df638c7d79ba09dbb URL:https://git.kernel.org/stable/c/f556e1d6fb9f2923a9a36f3df638c7d79ba09dbb
Assigning CNA
kernel.org
Date Record Created
20240521	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240521)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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