github - ghsa-pv5x-cgg5-p627

GHSA-PV5X-CGG5-P627

Vulnerability from github – Published: 2025-09-23 18:30 – Updated: 2025-09-23 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

netfilter: conntrack: revisit gc autotuning

as of commit 4608fdfc07e1 ("netfilter: conntrack: collect all entries in one cycle") conntrack gc was changed to run every 2 minutes.

On systems where conntrack hash table is set to large value, most evictions happen from gc worker rather than the packet path due to hash table distribution.

This causes netlink event overflows when events are collected.

This change collects average expiry of scanned entries and reschedules to the average remaining value, within 1 to 60 second interval.

To avoid event overflows, reschedule after each bucket and add a limit for both run time and number of evictions per run.

If more entries have to be evicted, reschedule and restart 1 jiffy into the future.

Severity ?

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49110"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:00:48Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: revisit gc autotuning\n\nas of commit 4608fdfc07e1\n(\"netfilter: conntrack: collect all entries in one cycle\")\nconntrack gc was changed to run every 2 minutes.\n\nOn systems where conntrack hash table is set to large value, most evictions\nhappen from gc worker rather than the packet path due to hash table\ndistribution.\n\nThis causes netlink event overflows when events are collected.\n\nThis change collects average expiry of scanned entries and\nreschedules to the average remaining value, within 1 to 60 second interval.\n\nTo avoid event overflows, reschedule after each bucket and add a\nlimit for both run time and number of evictions per run.\n\nIf more entries have to be evicted, reschedule and restart 1 jiffy\ninto the future.",
  "id": "GHSA-pv5x-cgg5-p627",
  "modified": "2025-09-23T18:30:20Z",
  "published": "2025-09-23T18:30:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49110"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2cfadb761d3d0219412fd8150faea60c7e863833"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58d52743ae85d28c9335c6034d6ce350b8689951"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/592e57591826f3d09c28d755a39ea8e9d13705ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7cd361d5e6d986c0d4cafb9ceaa803359048ae15"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49110 (GCVE-0-2022-49110)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:54 – Updated: 2025-05-04 08:30

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: revisit gc autotuning as of commit 4608fdfc07e1 ("netfilter: conntrack: collect all entries in one cycle") conntrack gc was changed to run every 2 minutes. On systems where conntrack hash table is set to large value, most evictions happen from gc worker rather than the packet path due to hash table distribution. This causes netlink event overflows when events are collected. This change collects average expiry of scanned entries and reschedules to the average remaining value, within 1 to 60 second interval. To avoid event overflows, reschedule after each bucket and add a limit for both run time and number of evictions per run. If more entries have to be evicted, reschedule and restart 1 jiffy into the future.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/58d52743ae85d28c9…
	https://git.kernel.org/stable/c/7cd361d5e6d986c0d…
	https://git.kernel.org/stable/c/592e57591826f3d09…
	https://git.kernel.org/stable/c/2cfadb761d3d02194…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 58d52743ae85d28c9335c6034d6ce350b8689951 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7cd361d5e6d986c0d4cafb9ceaa803359048ae15 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 592e57591826f3d09c28d755a39ea8e9d13705ad (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2cfadb761d3d0219412fd8150faea60c7e863833 (git)

Linux

Unaffected: 5.15.34 , ≤ 5.15.* (semver)
Unaffected: 5.16.20 , ≤ 5.16.* (semver)
Unaffected: 5.17.3 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)

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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conntrack_core.c"
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          "vendor": "Linux",
          "versions": [
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        },
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          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
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              "status": "unaffected",
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            },
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              "status": "unaffected",
              "version": "5.17.3",
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        {
          "url": "https://git.kernel.org/stable/c/2cfadb761d3d0219412fd8150faea60c7e863833"
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    "datePublished": "2025-02-26T01:54:55.998Z",
    "dateReserved": "2025-02-26T01:49:39.251Z",
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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-PV5X-CGG5-P627

CVE-2022-49110 (GCVE-0-2022-49110)

Tags

Sightings

Nomenclature