CVE-2026-72347
netfilter: xt_connmark: reject invalid shift parameters
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 15, 2026 |
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Affected Versions
Linux / Linux
472a73e00757b971d613d796374d2727b2e4954d < d8ce63d928b457fba7ed1e302492dfd32293671c 472a73e00757b971d613d796374d2727b2e4954d < 9657bb11a6376ab0a79f05d433713d6944111e9d 472a73e00757b971d613d796374d2727b2e4954d < 8ace320ac4416f5e5fbcd065309fb2dfcce787b0 472a73e00757b971d613d796374d2727b2e4954d < c3fa852d117b3fda72265e4230e3967db4a74fcf 472a73e00757b971d613d796374d2727b2e4954d < 4eef84b09a3836919360c4232b0f16651a155eec 472a73e00757b971d613d796374d2727b2e4954d < 230173cc6105bdfb2696d37e6e56687b003fbe63 472a73e00757b971d613d796374d2727b2e4954d < 1b47026fb4b35bac850ad6e8a4ad7fc018e09ebc
Linux / Linux
4.17
References
git.kernel.org: https://git.kernel.org/stable/c/d8ce63d928b457fba7ed1e302492dfd32293671c git.kernel.org: https://git.kernel.org/stable/c/9657bb11a6376ab0a79f05d433713d6944111e9d git.kernel.org: https://git.kernel.org/stable/c/8ace320ac4416f5e5fbcd065309fb2dfcce787b0 git.kernel.org: https://git.kernel.org/stable/c/c3fa852d117b3fda72265e4230e3967db4a74fcf git.kernel.org: https://git.kernel.org/stable/c/4eef84b09a3836919360c4232b0f16651a155eec git.kernel.org: https://git.kernel.org/stable/c/230173cc6105bdfb2696d37e6e56687b003fbe63 git.kernel.org: https://git.kernel.org/stable/c/1b47026fb4b35bac850ad6e8a4ad7fc018e09ebc