CVE-2022-49345 (GCVE-0-2022-49345)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:11 – Updated: 2025-05-04 08:35
VLAI?
Title
net: xfrm: unexport __init-annotated xfrm4_protocol_init()
Summary
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)
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2f32b51b609faea1e40bb8c5bd305f1351740936 , < c58d82a1264813e69119c13e9804e2e60b664ad5 (git)
Affected: 2f32b51b609faea1e40bb8c5bd305f1351740936 , < e53cd3814504b2cadaba4d5a8a07eeea9ddacd03 (git)
Affected: 2f32b51b609faea1e40bb8c5bd305f1351740936 , < 31f3c6a4dcd3260a386e62cef2d5b36e902600a1 (git)
Affected: 2f32b51b609faea1e40bb8c5bd305f1351740936 , < ef6d2354de238b065d8799c80da4be9a6af18e39 (git)
Affected: 2f32b51b609faea1e40bb8c5bd305f1351740936 , < be3884d5cd04ccd58294b83a02d70b7c5fca19d3 (git)
Affected: 2f32b51b609faea1e40bb8c5bd305f1351740936 , < 85a055c03691e51499123194a14a0c249cf33227 (git)
Affected: 2f32b51b609faea1e40bb8c5bd305f1351740936 , < e04d59cfe0c0129df7aba7ef7bb17b96be2a64f2 (git)
Affected: 2f32b51b609faea1e40bb8c5bd305f1351740936 , < 2b253fbc9f7b5db18d716436bdcf8ecef09fd63d (git)
Affected: 2f32b51b609faea1e40bb8c5bd305f1351740936 , < 4a388f08d8784af48f352193d2b72aaf167a57a1 (git)
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    Linux Linux Affected: 3.15
Unaffected: 0 , < 3.15 (semver)
Unaffected: 4.9.318 , ≤ 4.9.* (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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              "lessThanOrEqual": "4.9.*",
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              "version": "4.9.318",
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              "lessThanOrEqual": "4.14.*",
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              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: xfrm: unexport __init-annotated xfrm4_protocol_init()\n\nEXPORT_SYMBOL and __init is a bad combination because the .init.text\nsection is freed up after the initialization. Hence, modules cannot\nuse symbols annotated __init. The access to a freed symbol may end up\nwith kernel panic.\n\nmodpost used to detect it, but it has been broken for a decade.\n\nRecently, I fixed modpost so it started to warn it again, then this\nshowed up in linux-next builds.\n\nThere are two ways to fix it:\n\n  - Remove __init\n  - Remove EXPORT_SYMBOL\n\nI chose the latter for this case because the only in-tree call-site,\nnet/ipv4/xfrm4_policy.c is never compiled as modular.\n(CONFIG_XFRM is boolean)"
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        "dateUpdated": "2025-05-04T08:35:44.901Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/c58d82a1264813e69119c13e9804e2e60b664ad5"
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        {
          "url": "https://git.kernel.org/stable/c/e53cd3814504b2cadaba4d5a8a07eeea9ddacd03"
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          "url": "https://git.kernel.org/stable/c/31f3c6a4dcd3260a386e62cef2d5b36e902600a1"
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          "url": "https://git.kernel.org/stable/c/be3884d5cd04ccd58294b83a02d70b7c5fca19d3"
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          "url": "https://git.kernel.org/stable/c/85a055c03691e51499123194a14a0c249cf33227"
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          "url": "https://git.kernel.org/stable/c/e04d59cfe0c0129df7aba7ef7bb17b96be2a64f2"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b253fbc9f7b5db18d716436bdcf8ecef09fd63d"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a388f08d8784af48f352193d2b72aaf167a57a1"
        }
      ],
      "title": "net: xfrm: unexport __init-annotated xfrm4_protocol_init()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49345",
    "datePublished": "2025-02-26T02:11:00.976Z",
    "dateReserved": "2025-02-26T02:08:31.542Z",
    "dateUpdated": "2025-05-04T08:35:44.901Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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Sightings

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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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