Vulnerability-Lookup

FKIE_CVE-2026-31676

Vulnerability from fkie_nvd - Published: 2026-04-25 09:16 - Updated: 2026-05-06 21:31

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: rxrpc: only handle RESPONSE during service challenge Only process RESPONSE packets while the service connection is still in RXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before running response verification and security initialization, then use a local secured flag to decide whether to queue the secured-connection work after the state transition. This keeps duplicate or late RESPONSE packets from re-running the setup path and removes the unlocked post-transition state test.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: only handle RESPONSE during service challenge\n\nOnly process RESPONSE packets while the service connection is still in\nRXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before\nrunning response verification and security initialization, then use a local\nsecured flag to decide whether to queue the secured-connection work after\nthe state transition. This keeps duplicate or late RESPONSE packets from\nre-running the setup path and removes the unlocked post-transition state\ntest."
    }
  ],
  "id": "CVE-2026-31676",
  "lastModified": "2026-05-06T21:31:48.267",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-25T09:16:01.210",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-31676 (GCVE-0-2026-31676)

Vulnerability from cvelistv5 – Published: 2026-04-25 08:46 – Updated: 2026-04-27 14:04

Title

rxrpc: only handle RESPONSE during service challenge

Summary

Severity ?

7.5 (High)


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

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/a6bcf8010af093fe0…
	https://git.kernel.org/stable/c/29b44d904dceb832b…
	https://git.kernel.org/stable/c/d0035e634dae83237…
	https://git.kernel.org/stable/c/03fd2ef73cb4ffd0a…
	https://git.kernel.org/stable/c/c43ffdcfdbb5567b1…

Impacted products

Vendor

Product

Version

Linux

Affected: 17926a79320afa9b95df6b977b40cca6d8713cea , < a6bcf8010af093fe04f7100562e9542ab7882585 (git)
Affected: 17926a79320afa9b95df6b977b40cca6d8713cea , < 29b44d904dceb832be880def08b8cb17a0aba91c (git)
Affected: 17926a79320afa9b95df6b977b40cca6d8713cea , < d0035e634dae83237ab7f5681eb52b2f65d0ceb8 (git)
Affected: 17926a79320afa9b95df6b977b40cca6d8713cea , < 03fd2ef73cb4ffd0af100a95b634af54f474414e (git)
Affected: 17926a79320afa9b95df6b977b40cca6d8713cea , < c43ffdcfdbb5567b1f143556df8a04b4eeea041c (git)

Linux

Affected: 2.6.22
Unaffected: 0 , < 2.6.22 (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.84 , ≤ 6.12.* (semver)
Unaffected: 6.18.23 , ≤ 6.18.* (semver)
Unaffected: 6.19.13 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/conn_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          ]
        },
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          ],
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    "datePublished": "2026-04-25T08:46:52.285Z",
    "dateReserved": "2026-03-09T15:48:24.130Z",
    "dateUpdated": "2026-04-27T14:04:57.519Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

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

FKIE_CVE-2026-31676

CVE-2026-31676 (GCVE-0-2026-31676)

Tags

Sightings

Nomenclature