CVE-2022-49339 (GCVE-0-2022-49339)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:10 – Updated: 2026-05-11 18:57
VLAI?
Title
net: ipv6: unexport __init-annotated seg6_hmac_init()
Summary
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: - Remove __init - Remove EXPORT_SYMBOL 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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: bf355b8d2c30a289232042cacc1cfaea4923936c , < 64aef8efe96c1616142c4476a05731306fc4494e (git)
Affected: bf355b8d2c30a289232042cacc1cfaea4923936c , < ab8b2c2de273ec1d698a18e399896a6febb5cda0 (git)
Affected: bf355b8d2c30a289232042cacc1cfaea4923936c , < 317260b3eb6384a05a8af212308fa50f3b2e8290 (git)
Affected: bf355b8d2c30a289232042cacc1cfaea4923936c , < 5d9c1b081ad28c852a97e10dd75412546497694a (git)
Affected: bf355b8d2c30a289232042cacc1cfaea4923936c , < 1084716f76c8045eadf92a9d9a62641f3c8d8c90 (git)
Affected: bf355b8d2c30a289232042cacc1cfaea4923936c , < 3e6de5037148c5a93a436b1e8d2edad3dac11755 (git)
Affected: bf355b8d2c30a289232042cacc1cfaea4923936c , < 9ba4416b831eeb4d185e88e73488d1d21288e63a (git)
Affected: bf355b8d2c30a289232042cacc1cfaea4923936c , < 5801f064e35181c71857a80ff18af4dbec3c5f5c (git)
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Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 4.14.283 , ≤ 4.14.* (semver)
Unaffected: 4.19.247 , ≤ 4.19.* (semver)
Unaffected: 5.4.198 , ≤ 5.4.* (semver)
Unaffected: 5.10.122 , ≤ 5.10.* (semver)
Unaffected: 5.15.47 , ≤ 5.15.* (semver)
Unaffected: 5.17.15 , ≤ 5.17.* (semver)
Unaffected: 5.18.4 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.