CVE-2025-21648 (GCVE-0-2025-21648)

Vulnerability from cvelistv5 – Published: 2025-01-19 10:18 – Updated: 2026-05-12 12:03
VLAI?
Title
netfilter: conntrack: clamp maximum hashtable size to INT_MAX
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: clamp maximum hashtable size to INT_MAX Use INT_MAX as maximum size for the conntrack hashtable. Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof() when resizing hashtable because __GFP_NOWARN is unset. See: 0708a0afe291 ("mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls") Note: hashtable resize is only possible from init_netns.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58 , < a965f7f0ea3ae61b9165bed619d5d6da02c75f80 (git)
Affected: 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58 , < b1b2353d768f1b80cd7fe045a70adee576b9b338 (git)
Affected: 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58 , < 5552b4fd44be3393b930434a7845d8d95a2a3c33 (git)
Affected: 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58 , < d5807dd1328bbc86e059c5de80d1bbee9d58ca3d (git)
Affected: 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58 , < f559357d035877b9d0dcd273e0ff83e18e1d46aa (git)
Affected: 9cc1c73ad66610bffc80b691136ffc1e9a3b1a58 , < b541ba7d1f5a5b7b3e2e22dc9e40e18a7d6dbc13 (git)
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Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 5.10.234 , ≤ 5.10.* (semver)
Unaffected: 5.15.177 , ≤ 5.15.* (semver)
Unaffected: 6.1.125 , ≤ 6.1.* (semver)
Unaffected: 6.6.72 , ≤ 6.6.* (semver)
Unaffected: 6.12.10 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.