CVE-2026-98559 (GCVE-0-2026-98559)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:18 – Updated: 2026-10-19 09:21
VLAI
Title
net/smc: fix UAF on lgr list traversal in smcr_port_err()
Summary
In the Linux kernel, the following vulnerability has been resolved: net/smc: fix UAF on lgr list traversal in smcr_port_err() smcr_port_err() traverses smc_lgr_list.list without holding smc_lgr_list.lock, allowing a concurrent smc_lgr_terminate_sched() to free an lgr while it is still being dereferenced. Hold smc_lgr_list.lock across the traversal. Update smc_ib_gid_check() to call smcr_port_err() after releasing the lock.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 541afa10c126b6c22c2a805a559c70cc41fd156e , < 34bcf11cd2528ae00bb6d764d808083c66824277 (git)
Affected: 541afa10c126b6c22c2a805a559c70cc41fd156e , < 0edcc4284392b28826b5d37532b366b291e6e0fa (git)
Affected: 541afa10c126b6c22c2a805a559c70cc41fd156e , < 00a59600ae72d24859d0ad1783a78bc921bc2599 (git)
Affected: 541afa10c126b6c22c2a805a559c70cc41fd156e , < 3d35f069e1c119992000d51236dbe54da2d4e61e (git)
Affected: 541afa10c126b6c22c2a805a559c70cc41fd156e , < 3d65a2eb4449fc9658fb860dea893025d028d90e (git)
Affected: 541afa10c126b6c22c2a805a559c70cc41fd156e , < a9b968e42690d784c241a0761c10253271f7df5d (git)
Affected: 541afa10c126b6c22c2a805a559c70cc41fd156e , < 61cb282fe97b3b0ba32ca09417a693162bf4ae3f (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.15.222 , ≤ 5.15.* (semver)
Unaffected: 6.1.189 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.55 , ≤ 6.18.* (semver)
Unaffected: 7.2.9 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix UAF on lgr list traversal in smcr_port_err()\n\nsmcr_port_err() traverses smc_lgr_list.list without holding\nsmc_lgr_list.lock, allowing a concurrent smc_lgr_terminate_sched()\nto free an lgr while it is still being dereferenced.\n\nHold smc_lgr_list.lock across the traversal. Update\nsmc_ib_gid_check() to call smcr_port_err() after releasing the lock."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:21:43.436Z",
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        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/61cb282fe97b3b0ba32ca09417a693162bf4ae3f"
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    "datePublished": "2026-10-18T15:18:26.349Z",
    "dateReserved": "2026-09-25T10:25:14.357Z",
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    "state": "PUBLISHED"
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      "id": "msrc_CVE-2026-98559",
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      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "net/smc: fix UAF on lgr list traversal in smcr_port_err()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98559.json",
      "version": "5"
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          }
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        "id": "CVE-2026-98559",
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        "metrics": {},
        "published": "2026-10-18T16:17:08.033",
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        "vulnStatus": "Received"
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      "current_release_date": "2026-10-30T07:02:49+00:00",
      "cve": "CVE-2026-98559",
      "id": "CVE-2026-98559",
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      "product_status:known_affected": "237",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: net/smc: fix UAF on lgr list traversal in smcr_port_err()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98559.json",
      "version": "3"
    }
  }
}



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