Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ping: Fix potentail NULL deref for /proc/net/icmp. After commit dbca1596bbb0 ("ping: convert to RCU lookups, get rid of rwlock"), we use RCU for ping sockets, but we should use spinlock for /proc/net/icmp to avoid a potential NULL deref mentioned in the previous patch. Let's go back to using spinlock there. Note we can convert ping sockets to use hlist instead of hlist_nulls because we do not use SLAB_TYPESAFE_BY_RCU for ping sockets.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 before 5a08a32e624908890aa0a2eb442bb6a7669891a8; affected dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 before 176cbb6da28f36506cc60a4bec4ab8df0c16713a; affected dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 before ab5fb73ffa01072b4d8031cc05801fa1cb653bee; affected de3d723a3985f282a8c9e468d1e198616eb291c8; affected 5.19.2 before 5.20 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.1.24 through 6.1.*; unaffected 6.2.11 through 6.2.*; unaffected 6.3 through * |
CWE
No CWE identifiers supplied.