CVE-2023-53987
published 2025-12-24CVE-2023-53987: In the Linux kernel, the following vulnerability has been resolved: ping: Fix potentail NULL deref for /proc/net/icmp. After commit dbca1596bbb0 ("ping…
PriorityP420medium5.5
EPSS
0.17%
6.9th percentile
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
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.25-1 (bookworm) | linux 6.1.25-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 5.19.2 < 5.20 | 5.20 |
| linux | linux | >= dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 < 5a08a32e624908890aa0a2eb442bb6a7669891a8 | 5a08a32e624908890aa0a2eb442bb6a7669891a8 |
| linux | linux | >= dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 < 176cbb6da28f36506cc60a4bec4ab8df0c16713a | 176cbb6da28f36506cc60a4bec4ab8df0c16713a |
| linux | linux | >= dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 < ab5fb73ffa01072b4d8031cc05801fa1cb653bee | ab5fb73ffa01072b4d8031cc05801fa1cb653bee |
| linux | linux_kernel | >= 0 < 6.1.25-1 | 6.1.25-1 |
| linux | linux_kernel | >= 0 < 6.1.25-1 | 6.1.25-1 |
| linux | linux_kernel | >= 0 < 6.1.25-1 | 6.1.25-1 |
| linux | linux_kernel | >= 6.0.0 < 6.1.24 | 6.1.24 |
| linux | linux_kernel | >= 6.2.0 < 6.2.11 | 6.2.11 |
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Red Hat
kernel: Linux kernel: Denial of Service via NULL dereference in ping socket handling
vendor_redhat·2025-12-24·CVSS 5.5
CVE-2023-53987 [MEDIUM] CWE-476 kernel: Linux kernel: Denial of Service via NULL dereference in ping socket handling
kernel: Linux kernel: Denial of Service via NULL dereference in ping socket handling
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.
A flaw was found in the Linux kernel. A local attacker could exploit a potential NULL dereference vulnerability in the `ping` socket handling when accessing `/proc/net/icmp`. This issue arises from an incor
Debian
CVE-2023-53987: linux - In the Linux kernel, the following vulnerability has been resolved: ping: Fix p...
vendor_debian·2023
CVE-2023-53987 CVE-2023-53987: linux - In the Linux kernel, the following vulnerability has been resolved: ping: Fix p...
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.
Scope: local
bookworm: resolved (fixed in 6.1.25-1)
bullseye: resolved
forky: resolved (fixed in 6.1.25-1)
sid: resolved (fixed in 6.1.25-1)
trixie: resolved (fixed in 6.1.25-1)
OSV
ping: Fix potentail NULL deref for /proc/net/icmp.
osv·2025-12-24
CVE-2023-53987 ping: Fix potentail NULL deref for /proc/net/icmp.
ping: Fix potentail NULL deref for /proc/net/icmp.
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.
GHSA
GHSA-m6qc-r2rx-cm2q: In the Linux kernel, the following vulnerability has been resolved:
ping: Fix potentail NULL deref for /proc/net/icmp
ghsa_unreviewed·2025-12-24
CVE-2023-53987 GHSA-m6qc-r2rx-cm2q: In the Linux kernel, the following vulnerability has been resolved:
ping: Fix potentail NULL deref for /proc/net/icmp
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.
OSV
CVE-2023-53987: In the Linux kernel, the following vulnerability has been resolved: ping: Fix potentail NULL deref for /proc/net/icmp
osv·2025-12-24
CVE-2023-53987 CVE-2023-53987: In the Linux kernel, the following vulnerability has been resolved: ping: Fix potentail NULL deref for /proc/net/icmp
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.
No detection rules found.
No public exploits indexed.
Wiz
CVE-2023-53987 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz
CVE-2023-53987 CVE-2023-53987 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2023-53987 :
Linux Kernel vulnerability analysis and mitigation
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.
Source : NVD
Published December 24, 2025
CNA Score N/A
Affected Technologies
Linux Kernel
Linux Debian
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploita
Bugzilla
CVE-2023-53987 kernel: Linux kernel: Denial of Service via NULL dereference in ping socket handling
bugzilla·2025-12-24
CVE-2023-53987 [MEDIUM] CVE-2023-53987 kernel: Linux kernel: Denial of Service via NULL dereference in ping socket handling
CVE-2023-53987 kernel: Linux kernel: Denial of Service via NULL dereference in ping socket handling
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.
Discussion:
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122422-CVE-2023-53987-9f08@gregkh/T
2025-12-24
Published