CVE-2022-49345

published 2025-02-26

CVE-2022-49345: In the Linux kernel, the following vulnerability has been resolved: net: xfrm: unexport __init-annotated xfrm4_protocol_init() EXPORT_SYMBOL and __init is a…

Priority P4 20 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

In the Linux kernel, the following vulnerability has been resolved:

net: xfrm: unexport __init-annotated xfrm4_protocol_init()

EXPORT_SYMBOL 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:

- Remove __init
- Remove EXPORT_SYMBOL

I chose the latter for this case because the only in-tree call-site,
net/ipv4/xfrm4_policy.c is never compiled as modular.
(CONFIG_XFRM is boolean)

Affected

24 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.18.5-1 (bookworm)	linux 5.18.5-1 (bookworm)
linux	linux	—	—
linux	linux	>= 2f32b51b609faea1e40bb8c5bd305f1351740936 < c58d82a1264813e69119c13e9804e2e60b664ad5	c58d82a1264813e69119c13e9804e2e60b664ad5
linux	linux	>= 2f32b51b609faea1e40bb8c5bd305f1351740936 < e53cd3814504b2cadaba4d5a8a07eeea9ddacd03	e53cd3814504b2cadaba4d5a8a07eeea9ddacd03
linux	linux	>= 2f32b51b609faea1e40bb8c5bd305f1351740936 < 31f3c6a4dcd3260a386e62cef2d5b36e902600a1	31f3c6a4dcd3260a386e62cef2d5b36e902600a1
linux	linux	>= 2f32b51b609faea1e40bb8c5bd305f1351740936 < ef6d2354de238b065d8799c80da4be9a6af18e39	ef6d2354de238b065d8799c80da4be9a6af18e39
linux	linux	>= 2f32b51b609faea1e40bb8c5bd305f1351740936 < be3884d5cd04ccd58294b83a02d70b7c5fca19d3	be3884d5cd04ccd58294b83a02d70b7c5fca19d3
linux	linux	>= 2f32b51b609faea1e40bb8c5bd305f1351740936 < 85a055c03691e51499123194a14a0c249cf33227	85a055c03691e51499123194a14a0c249cf33227
linux	linux	>= 2f32b51b609faea1e40bb8c5bd305f1351740936 < e04d59cfe0c0129df7aba7ef7bb17b96be2a64f2	e04d59cfe0c0129df7aba7ef7bb17b96be2a64f2
linux	linux	>= 2f32b51b609faea1e40bb8c5bd305f1351740936 < 2b253fbc9f7b5db18d716436bdcf8ecef09fd63d	2b253fbc9f7b5db18d716436bdcf8ecef09fd63d
linux	linux	>= 2f32b51b609faea1e40bb8c5bd305f1351740936 < 4a388f08d8784af48f352193d2b72aaf167a57a1	4a388f08d8784af48f352193d2b72aaf167a57a1
linux	linux_kernel	—	—
linux	linux_kernel	>= 0 < 5.10.127-1	5.10.127-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 3.15 < 4.9.318	4.9.318
linux	linux_kernel	>= 4.10 < 4.14.283	4.14.283
linux	linux_kernel	>= 4.15 < 4.19.247	4.19.247
linux	linux_kernel	>= 4.20 < 5.4.198	5.4.198
linux	linux_kernel	>= 5.11 < 5.15.47	5.15.47
linux	linux_kernel	>= 5.16 < 5.17.15	5.17.15
linux	linux_kernel	>= 5.18 < 5.18.4	5.18.4
linux	linux_kernel	>= 5.5 < 5.10.122	5.10.122

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 MEDIUM

vendor_redhat 5.5 MEDIUM

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