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CVE-2023-53987

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CVE-2023-53987

Published: Dec 24, 2025

Modified: May 23, 2026

PUBLISHED

Description

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.

VendorProductVersions

Linux

Linux

affected
dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 - < 5a08a32e624908890aa0a2eb442bb6a7669891a8
affected
dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 - < 176cbb6da28f36506cc60a4bec4ab8df0c16713a
affected
dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 - < ab5fb73ffa01072b4d8031cc05801fa1cb653bee
affected
de3d723a3985f282a8c9e468d1e198616eb291c8
affected
5.19.2 - < 5.20

Linux

Linux

affected
6.0
unaffected
0 - < 6.0
unaffected
6.1.24 - <= 6.1.*
unaffected
6.2.11 - <= 6.2.*
unaffected
6.3 - <= *

References

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