Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case In decode_int(), the CONS case calls get_bits(bs, 2) to read a length value, then calls get_uint(bs, len) without checking that len bytes remain in the buffer. The existing boundary check only validates the 2 bits for get_bits(), not the subsequent 1-4 bytes that get_uint() reads. This allows a malformed H.323/RAS packet to cause a 1-4 byte slab-out-of-bounds read. Add a boundary check for len bytes after get_bits() and before get_uint().
Affected products
linux: linux kernel
References10
- git.kernel.org/stable/c/1e3a3593162c96e8a8de48b1e14f60c3b57fca8a Patch
- git.kernel.org/stable/c/41b417ff73a24b2c68134992cc44c88db27f482d Patch
- git.kernel.org/stable/c/52235bf88159a1ef16434ab49e47e99c8a09ab20 Patch
- git.kernel.org/stable/c/6bce72daeccca9aa1746e92d6c3d4784e71f2ebb Patch
- git.kernel.org/stable/c/774a434f8c9c8602a976b2536f65d0172a07f4d2 Patch
- git.kernel.org/stable/c/a2cd54b9348e485d338b3c132338a4410c99afaf Patch
- git.kernel.org/stable/c/c95dc674ebf01ecfb40388b6facfc89b81fed3b7 Patch
- git.kernel.org/stable/c/fb6c3596823ec5dd09c2123340330d7448f51a59 Patch
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-082556.html
Metrics
- CVSS 3.1
-
8.2
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H - EPSS — exploit probability
- 1% percentile: 46 · as of 12 November 2026
- CWE
- CWE-125
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