Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: mpls: add seqcount to protect the platform_label{,s} pair The RCU-protected codepaths (mpls_forward, mpls_dump_routes) can have an inconsistent view of platform_labels vs platform_label in case of a concurrent resize (resize_platform_label_table, under platform_mutex). This can lead to OOB accesses. This patch adds a seqcount, so that we get a consistent snapshot. Note that mpls_label_ok is also susceptible to this, so the check against RTA_DST in rtm_to_route_config, done outside platform_mutex, is not sufficient. This value gets passed to mpls_label_ok once more in both mpls_route_add and mpls_route_del, so there is no issue, but that additional check must not be removed.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7720c01f3f590116882e251f13c7e1d5602f8643 before 0d377825548fe598595b5a5fa4a309fb593d8fb4; affected 7720c01f3f590116882e251f13c7e1d5602f8643 before 8adc5b6fc876928d8c95555d30b66fa50b07421e; affected 7720c01f3f590116882e251f13c7e1d5602f8643 before 5bb3caf0bbfb56f1a00d2af072ac3d8395a3b9ef; affected 7720c01f3f590116882e251f13c7e1d5602f8643 before 629ec78ef8608d955ce217880cdc3e1873af3a15 |
| Linux / Linux | affected 4.1; unaffected 0 before 4.1; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.19.12 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0d377825548fe598595b5a5fa4a309fb593d8fb4
- https://git.kernel.org/stable/c/8adc5b6fc876928d8c95555d30b66fa50b07421e
- https://git.kernel.org/stable/c/5bb3caf0bbfb56f1a00d2af072ac3d8395a3b9ef
- https://git.kernel.org/stable/c/629ec78ef8608d955ce217880cdc3e1873af3a15
ADP enrichment
No English description supplied.
No references supplied.