CVE-2026-72347
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: xt_connmark: reject invalid shift parameters
Revision 2 of the CONNMARK target accepts user-controlled shift parameters and applies them to 32-bit mark values in connmark_tg_shift().
A shift_bits value of 32 or more triggers an undefined-shift bug when the rule is evaluated. Invalid shift_dir values are also accepted and silently fall back to the left-shift path.
Reject invalid revision-2 shift parameters in connmark_tg_check() so malformed rules fail at installation time, before they can reach the packet path.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 472a73e00757b971d613d796374d2727b2e4954d < d8ce63d928b457fba7ed1e302492dfd32293671c | affected |
| Linux | Linux | 472a73e00757b971d613d796374d2727b2e4954d < 9657bb11a6376ab0a79f05d433713d6944111e9d | affected |
| Linux | Linux | 472a73e00757b971d613d796374d2727b2e4954d < 8ace320ac4416f5e5fbcd065309fb2dfcce787b0 | affected |
| Linux | Linux | 472a73e00757b971d613d796374d2727b2e4954d < c3fa852d117b3fda72265e4230e3967db4a74fcf | affected |
| Linux | Linux | 472a73e00757b971d613d796374d2727b2e4954d < 4eef84b09a3836919360c4232b0f16651a155eec | affected |
| Linux | Linux | 472a73e00757b971d613d796374d2727b2e4954d < 230173cc6105bdfb2696d37e6e56687b003fbe63 | affected |
| Linux | Linux | 472a73e00757b971d613d796374d2727b2e4954d < 1b47026fb4b35bac850ad6e8a4ad7fc018e09ebc | affected |
| Linux | Linux | 4.17 | affected |
| Linux | Linux | 0 < 4.17 | unaffected |
| Linux | Linux | 5.15.212 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.178 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.145 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.97 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.40 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.5 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/d8ce63d928b457fba7ed1e302492dfd32293671c
- https://git.kernel.org/stable/c/9657bb11a6376ab0a79f05d433713d6944111e9d
- https://git.kernel.org/stable/c/8ace320ac4416f5e5fbcd065309fb2dfcce787b0
- https://git.kernel.org/stable/c/c3fa852d117b3fda72265e4230e3967db4a74fcf
- https://git.kernel.org/stable/c/4eef84b09a3836919360c4232b0f16651a155eec
- https://git.kernel.org/stable/c/230173cc6105bdfb2696d37e6e56687b003fbe63
- https://git.kernel.org/stable/c/1b47026fb4b35bac850ad6e8a4ad7fc018e09ebc
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