CVE-2024-53211
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-53211
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-53211.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-53211
- Downstream
- Published
- 2024-12-27T14:15:29Z
- Modified
- 2025-08-09T20:01:28Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net/l2tp: fix warning in l2tpexitnet found by syzbot
In l2tp's net exit handler, we check that an IDR is empty before destroying it:
WARN_ON_ONCE(!idr_is_empty(&pn->l2tp_tunnel_idr)); idr_destroy(&pn->l2tp_tunnel_idr);By forcing memory allocation failures in idralloc32, syzbot is able to provoke a condition where idrisempty returns false despite there being no items in the IDR. This turns out to be because the radix tree of the IDR contains only internal radix-tree nodes and it is this that causes idrisempty to return false. The internal nodes are cleaned by idr_destroy.
Use idrforeach to check that the IDR is empty instead of idrisempty to avoid the problem.
- References
Affected packages
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