CVE-2021-47218
See a problem?- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47218
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47218.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47218
- Related
- Published
- 2024-04-10T19:15:48Z
- Modified
- 2024-09-11T04:51:16.612854Z
- Summary
- [none]
- Details
-
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 hashtabinit(), 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 hashtabinit(), hashtabmap() and hashtabdestroy() 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
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source