CVE-2022-49339None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: net: ipv6: unexport __init-annotated seg6_hmac_init() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.3%
In the Linux kernel, the following vulnerability has been resolved:
net: ipv6: unexport __init-annotated seg6_hmac_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:
I chose the latter for this case because the caller (net/ipv6/seg6.c) and the callee (net/ipv6/seg6_hmac.c) belong to the same module. It seems an internal function call in ipv6.ko.
Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 64aef8efe96c1616142c4476a05731306fc4494eLinux >= bf355b8d2c30a289232042cacc1cfaea4923936c < ab8b2c2de273ec1d698a18e399896a6febb5cda0Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 317260b3eb6384a05a8af212308fa50f3b2e8290Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 5d9c1b081ad28c852a97e10dd75412546497694aLinux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 1084716f76c8045eadf92a9d9a62641f3c8d8c90Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 3e6de5037148c5a93a436b1e8d2edad3dac11755Linux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 9ba4416b831eeb4d185e88e73488d1d21288e63aLinux >= bf355b8d2c30a289232042cacc1cfaea4923936c < 5801f064e35181c71857a80ff18af4dbec3c5f5cLinux 4.10Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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