CVE - CVE-2021-47218

CVE-ID
CVE-2021-47218	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: selinux: fix NULL-pointer dereference when hashtab allocation fails When the hash table slot array allocation fails in hashtab_init(), h->size is left initialized with a non-zero value, but the h->htable pointer is NULL. This may then cause a NULL pointer dereference, since the policydb code relies on the assumption that even after a failed hashtab_init(), hashtab_map() and hashtab_destroy() can be safely called on it. Yet, these detect an empty hashtab only by looking at the size. Fix this by making sure that hashtab_init() always leaves behind a valid empty hashtab when the allocation fails.
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/83c8ab8503adf56bf68dafc7a382f4946c87da79 URL:https://git.kernel.org/stable/c/83c8ab8503adf56bf68dafc7a382f4946c87da79 MISC:https://git.kernel.org/stable/c/b17dd53cac769dd13031b0ca34f90cc65e523fab URL:https://git.kernel.org/stable/c/b17dd53cac769dd13031b0ca34f90cc65e523fab MISC:https://git.kernel.org/stable/c/dc27f3c5d10c58069672215787a96b4fae01818b URL:https://git.kernel.org/stable/c/dc27f3c5d10c58069672215787a96b4fae01818b
Assigning CNA
kernel.org
Date Record Created
20240410	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 (20240410)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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