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Vulnerabilities

Vulnerability · CVE-2023-53987

In the Linux kernel, the following vulnerability has been resolved: ping: Fix potentail NULL deref for /proc/net/icmp.

Published Dec 24, 2025 · catalog updated May 23, 2026 · Linux Linux

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2023-53987. EPSS is 0.20%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
None0.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.20%
Remediation
Version ranges on file
Affected products
vendor Linux Linux dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 <5a08a32e624908890aa0a2eb442bb6a7669891a8

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 <5a08a32e624908890aa0a2eb442bb6a7669891a8dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 <5a08a32e624908890aa0a2eb442bb6a7669891a8

How to fix CVE-2023-53987

  • Upgrade

    CVE-2023-53987 lists a fix boundary at 5a08a32e624908890aa0a2eb442bb6a7669891a8. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 <5a08a32e624908890aa0a2eb442bb6a7669891a8

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-53987. EPSS is 0.20%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 <5a08a32e624908890aa0a2eb442bb6a7669891a8 dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 <5a08a32e624908890aa0a2eb442bb6a7669891a8. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.20%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 24, 2025 · EUVD

    Detected

    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 pin

  2. May 23, 2026 · EUVD

    Updated

    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 pin

Sources

  • CVE.orgVulnerability recordCVE-2023-53987

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-53987

    30-day exploitation probability 0.20%

    first.org
  • EUVDVulnerability recordEUVD-2025-205172

    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 avoi

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 29, 2026
  • EUVDOct 29, 2026