DEBIAN-CVE-2021-47068
- Source
- https://security-tracker.debian.org/tracker/DEBIAN-CVE-2021-47068
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47068.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-47068
- Upstream
- Published
- 2024-02-29T23:15:08Z
- Modified
- 2025-09-18T05:18:35Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved: net/nfc: fix use-after-free llcpsockbind/connect Commits 8a4cd82d ("nfc: fix refcount leak in llcpsockconnect()") and c33b1cc62 ("nfc: fix refcount leak in llcpsockbind()") fixed a refcount leak bug in bind/connect but introduced a use-after-free if the same local is assigned to 2 different sockets. This can be triggered by the following simple program: int sock1 = socket( AFNFC, SOCKSTREAM, NFCSOCKPROTOLLCP ); int sock2 = socket( AFNFC, SOCKSTREAM, NFCSOCKPROTOLLCP ); memset( &addr, 0, sizeof(struct sockaddrnfcllcp) ); addr.safamily = AFNFC; addr.nfcprotocol = NFCPROTONFCDEP; bind( sock1, (struct sockaddr) &addr, sizeof(struct sockaddr_nfc_llcp) ) bind( sock2, (struct sockaddr) &addr, sizeof(struct sockaddrnfcllcp) ) close(sock1); close(sock2); Fix this by assigning NULL to llcpsock->local after calling nfcllcplocalput. This addresses CVE-2021-23134.
- 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
Debian:14 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source