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
Configurations
Configuration 1 (hide)
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History
14 Jan 2025, 14:44
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/83c8ab8503adf56bf68dafc7a382f4946c87da79 - Patch | |
| References | () https://git.kernel.org/stable/c/b17dd53cac769dd13031b0ca34f90cc65e523fab - Patch | |
| References | () https://git.kernel.org/stable/c/dc27f3c5d10c58069672215787a96b4fae01818b - Patch | |
| CWE | CWE-476 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
Information
Published : 2024-04-10 19:15
Updated : 2025-01-14 14:44
NVD link : CVE-2021-47218
Mitre link : CVE-2021-47218
CVE.ORG link : CVE-2021-47218
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference