CVE-2022-49345
Feb. 26, 2025, 7:01 a.m.
None
No Score
Description
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)
Product(s) Impacted
Product | Versions |
---|---|
Linux Kernel |
|
Weaknesses
Common security weaknesses mapped to this vulnerability.
References
Tags
Timeline
Published: Feb. 26, 2025, 7:01 a.m.
Last Modified: Feb. 26, 2025, 7:01 a.m.
Last Modified: Feb. 26, 2025, 7:01 a.m.
Status : Awaiting Analysis
CVE has been recently published to the CVE List and has been received by the NVD.
More infoSource
416baaa9-dc9f-4396-8d5f-8c081fb06d67
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