github - ghsa-m6qc-r2rx-cm2q

GHSA-M6QC-R2RX-CM2Q

Vulnerability from github – Published: 2025-12-24 12:30 – Updated: 2025-12-24 12:30

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53987"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T11:15:51Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nping: Fix potentail NULL deref for /proc/net/icmp.\n\nAfter commit dbca1596bbb0 (\"ping: convert to RCU lookups, get rid\nof rwlock\"), we use RCU for ping sockets, but we should use spinlock\nfor /proc/net/icmp to avoid a potential NULL deref mentioned in\nthe previous patch.\n\nLet\u0027s go back to using spinlock there.\n\nNote we can convert ping sockets to use hlist instead of hlist_nulls\nbecause we do not use SLAB_TYPESAFE_BY_RCU for ping sockets.",
  "id": "GHSA-m6qc-r2rx-cm2q",
  "modified": "2025-12-24T12:30:26Z",
  "published": "2025-12-24T12:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53987"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/176cbb6da28f36506cc60a4bec4ab8df0c16713a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a08a32e624908890aa0a2eb442bb6a7669891a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab5fb73ffa01072b4d8031cc05801fa1cb653bee"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2023-53987 (GCVE-0-2023-53987)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:55 – Updated: 2025-12-24 10:55

Title

ping: Fix potentail NULL deref for /proc/net/icmp.

Summary

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.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/5a08a32e624908890…
	https://git.kernel.org/stable/c/176cbb6da28f36506…
	https://git.kernel.org/stable/c/ab5fb73ffa01072b4…

Impacted products

Vendor

Product

Version

Linux

Affected: dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 , < 5a08a32e624908890aa0a2eb442bb6a7669891a8 (git)
Affected: dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 , < 176cbb6da28f36506cc60a4bec4ab8df0c16713a (git)
Affected: dbca1596bbb08318f5e3b3b99f8ca0a0d3830a65 , < ab5fb73ffa01072b4d8031cc05801fa1cb653bee (git)
Affected: de3d723a3985f282a8c9e468d1e198616eb291c8 (git)

Linux

Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.24 , ≤ 6.1.* (semver)
Unaffected: 6.2.11 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

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  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/ping.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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          ],
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          "vendor": "Linux",
          "versions": [
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-M6QC-R2RX-CM2Q

CVE-2023-53987 (GCVE-0-2023-53987)

Tags

Sightings

Nomenclature