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CVE-2025-21648 In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: clamp maximum hashtable size…
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 6.13 | earliest → < 6.13 | 6.13 |
| Linux 6.12 | earliest → < 6.12.10 | 6.12.10 |
| Linux 6.6 | earliest → < 6.6.72 | 6.6.72 |
| Linux 6.1 | earliest → < 6.1.125 | 6.1.125 |
| Linux 5.15 | earliest → < 5.15.177 | 5.15.177 |
| Linux 5.10 | earliest → < 5.10.234 | 5.10.234 |
| Linux | 4.7 | No fix stated |
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | Versions not published | |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.7 → latest | No fix stated |
Show the 2 other branches Hide the 2 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 | 3.1.7 → latest | No fix stated |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.7 → latest | No fix stated |
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