CVE-2026-31407
Description
In the Linux kernel, the following vulnerability has been resolved:
netfilter: conntrack: add missing netlink policy validations
Hyunwoo Kim reports out-of-bounds access in sctp and ctnetlink.
These attributes are used by the kernel without any validation. Extend the netlink policies accordingly.
Quoting the reporter: nlattr_to_sctp() assigns the user-supplied CTA_PROTOINFO_SCTP_STATE value directly to ct->proto.sctp.state without checking that it is within the valid range. [..]
and: ... with exp->dir = 100, the access at ct->master->tuplehash[100] reads 5600 bytes past the start of a 320-byte nf_conn object, causing a slab-out-of-bounds read confirmed by UBSAN.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
8(expand)+ 5 more
- (no CPE)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=2.6.27,<6.6.136
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/0fbae1e74493d5a160a70c51aeba035d8266ea7dnvdPatch
- git.kernel.org/stable/c/67c53c1978cef3c504237275e39c857e2f6af56envdPatch
- git.kernel.org/stable/c/9174d28f3f15d8c4962f5980c0be167633880443nvdPatch
- git.kernel.org/stable/c/c5e918390002edf0cff80a0e7ce1f86f16a9507cnvdPatch
- git.kernel.org/stable/c/f900e1d77ee0ef87bfb5ab3fe60f0b3d8ad5ba05nvdPatch
- git.kernel.org/stable/c/78bba9f73942aa7dca47d817d8cec0fb9b443b70nvd
- git.kernel.org/stable/c/be88a337bf07afb1ee173f1099294d1b7ab3fefenvd
- git.kernel.org/stable/c/e7b5766693477c52424cc6c79dd30a7a9c7db52cnvd
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