Description
In the Linux kernel, the following vulnerability has been resolved: net: nexthop: Initialize all fields in dumped nexthops struct nexthop_grp contains two reserved fields that are not initialized by nla_put_nh_group(), and carry garbage. This can be observed e.g. with strace (edited for clarity): # ip nexthop add id 1 dev lo # ip nexthop add id 101 group 1 # strace -e recvmsg ip nexthop get id 101 ... recvmsg(... [{nla_len=12, nla_type=NHA_GROUP}, [{id=1, weight=0, resvd1=0x69, resvd2=0x67}]] ...) = 52 The fields are reserved and therefore not currently used. But as they are, they leak kernel memory, and the fact they are not just zero complicates repurposing of the fields for new ends. Initialize the full structure.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
430a049190de3c9e219f43084de9f1122da04570 to < fd06cb4a5fc7bda3dea31712618a62af72a1c6cbaffected430a049190de3c9e219f43084de9f1122da04570 to < 5cc4d71dda2dd4f1520f40e634a527022e48ccd8affected430a049190de3c9e219f43084de9f1122da04570 to < 9e8f558a3afe99ce51a642ce0d3637ddc2b5d5d0affected430a049190de3c9e219f43084de9f1122da04570 to < 1377de719652d868f5317ba8398b7e74c5f0430baffected430a049190de3c9e219f43084de9f1122da04570 to < 7704460acd7f5d35eb07c52500987dc9b95313fbaffected430a049190de3c9e219f43084de9f1122da04570 to < a13d3864b76ac87085ec530b2ff8e37482a63a96affected430a049190de3c9e219f43084de9f1122da04570 to < 6d745cd0e9720282cd291d36b9db528aea18add2affected
Linux Linux
Default version status: affected
5.3affected0 to < 5.3unaffected5.4.282 to ≤ 5.4.*unaffected5.10.224 to ≤ 5.10.*unaffected5.15.165 to ≤ 5.15.*unaffected6.1.103 to ≤ 6.1.*unaffected6.6.44 to ≤ 6.6.*unaffected6.10.3 to ≤ 6.10.*unaffected6.11 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/fd06cb4a5fc7bda3dea31712618a62af72a1c6cb ↗
- https://git.kernel.org/stable/c/5cc4d71dda2dd4f1520f40e634a527022e48ccd8 ↗
- https://git.kernel.org/stable/c/9e8f558a3afe99ce51a642ce0d3637ddc2b5d5d0 ↗
- https://git.kernel.org/stable/c/1377de719652d868f5317ba8398b7e74c5f0430b ↗
- https://git.kernel.org/stable/c/7704460acd7f5d35eb07c52500987dc9b95313fb ↗
- https://git.kernel.org/stable/c/a13d3864b76ac87085ec530b2ff8e37482a63a96 ↗
- https://git.kernel.org/stable/c/6d745cd0e9720282cd291d36b9db528aea18add2 ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html ↗