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PRIOn knowledge basePRION:CVE-2021-33033HistoryMay 14, 2021 - 11:15 p.m.
Design/Logic Flaw
2021-05-1423:15:00
PRIOn knowledge base
www.prio-n.com
13
The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads to writing an arbitrary value.
References
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08
sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt
syzkaller.appspot.com/bug?id=96e7d345748d8814901c91cd92084ed04b46701e
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