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CVE-2023-53987ping: Fix potentail NULL deref for /proc/net/icmp.

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.

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 5 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Deferred.

EPSS (exploitation in 30 days)
0.20% · top 90% of all CVEs (13 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • 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 < 6.0
    • unaffected 6.1.24 – ≤ 6.1.*
    • unaffected 6.2.11 – ≤ 6.2.*
    • unaffected 6.3 – ≤ *

References

References3

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .