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 bad combination because the .init.text section is freed up after the initialization.
Does this matter?
Lower severity and a low EPSS score (0.29%). Track it; it rarely justifies an emergency change on its own.
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)
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.29% probability · 22th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2b253fbc9f7b5db18d716436bdcf8ecef09fd63dPatch
- https://git.kernel.org/stable/c/31f3c6a4dcd3260a386e62cef2d5b36e902600a1Patch
- https://git.kernel.org/stable/c/4a388f08d8784af48f352193d2b72aaf167a57a1Patch
- https://git.kernel.org/stable/c/85a055c03691e51499123194a14a0c249cf33227Patch
- https://git.kernel.org/stable/c/be3884d5cd04ccd58294b83a02d70b7c5fca19d3Patch
- https://git.kernel.org/stable/c/c58d82a1264813e69119c13e9804e2e60b664ad5Patch
- https://git.kernel.org/stable/c/e04d59cfe0c0129df7aba7ef7bb17b96be2a64f2Patch
- https://git.kernel.org/stable/c/e53cd3814504b2cadaba4d5a8a07eeea9ddacd03Patch
- https://git.kernel.org/stable/c/ef6d2354de238b065d8799c80da4be9a6af18e39Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.