In the Linux kernel, the following vulnerability has been resolved:
net: xfrm: unexport _init-annotated xfrm4protocol_init()
EXPORTSYMBOL and _init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic.
modpost used to detect it, but it has been broken for a decade.
Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds.
There are two ways to fix it:
I chose the latter for this case because the only in-tree call-site, net/ipv4/xfrm4policy.c is never compiled as modular. (CONFIGXFRM is boolean)
[
{
"id": "CVE-2022-49345-0e2c88a0",
"target": {
"file": "net/ipv4/xfrm4_protocol.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@85a055c03691e51499123194a14a0c249cf33227",
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},
"deprecated": false,
"signature_version": "v1"
},
{
"id": "CVE-2022-49345-6a878980",
"target": {
"file": "net/ipv4/xfrm4_protocol.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e53cd3814504b2cadaba4d5a8a07eeea9ddacd03",
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},
{
"id": "CVE-2022-49345-72db1646",
"target": {
"file": "net/ipv4/xfrm4_protocol.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ef6d2354de238b065d8799c80da4be9a6af18e39",
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"deprecated": false,
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{
"id": "CVE-2022-49345-8e65c114",
"target": {
"file": "net/ipv4/xfrm4_protocol.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@4a388f08d8784af48f352193d2b72aaf167a57a1",
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{
"id": "CVE-2022-49345-93b72da8",
"target": {
"file": "net/ipv4/xfrm4_protocol.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e04d59cfe0c0129df7aba7ef7bb17b96be2a64f2",
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"deprecated": false,
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},
{
"id": "CVE-2022-49345-b024f4d2",
"target": {
"file": "net/ipv4/xfrm4_protocol.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@be3884d5cd04ccd58294b83a02d70b7c5fca19d3",
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{
"id": "CVE-2022-49345-b13af7c2",
"target": {
"file": "net/ipv4/xfrm4_protocol.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@31f3c6a4dcd3260a386e62cef2d5b36e902600a1",
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{
"id": "CVE-2022-49345-cb54b928",
"target": {
"file": "net/ipv4/xfrm4_protocol.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2b253fbc9f7b5db18d716436bdcf8ecef09fd63d",
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"deprecated": false,
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{
"id": "CVE-2022-49345-eda730bf",
"target": {
"file": "net/ipv4/xfrm4_protocol.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c58d82a1264813e69119c13e9804e2e60b664ad5",
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]