Published: 14/05/2021 Updated: 09/06/2021

CVSS v2 Base Score: 4.6 | Impact Score: 6.4 | Exploitability Score: 3.9

CVSS v3 Base Score: 7.8 | Impact Score: 5.9 | Exploitability Score: 1.8

VMScore: 410

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

The Linux kernel prior to 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.

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linux linux kernel

Several security issues were fixed in the Linux kernel ...

kernel: refcount leak in llcp_sock_bind() (CVE-2020-25670) kernel: refcount leak in llcp_sock_connect() (CVE-2020-25671) kernel: memory leak in llcp_sock_connect() (CVE-2020-25672) An issue was discovered in the Linux kernel related to mm/gupc and mm/huge_memoryc The get_user_pages (aka gup) implementation, when used for a copy-on-write page, do ...

CWE-416 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt https://syzkaller.appspot.com/bug?id=96e7d345748d8814901c91cd92084ed04b46701e https://nvd.nist.gov https://ubuntu.com/security/notices/USN-5343-1

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CVE-2021-33033

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