CVE-2026-23242 (GCVE-0-2026-23242)

Vulnerability from cvelistv5 – Published: 2026-03-18 10:05 – Updated: 2026-04-13 06:02
VLAI?
Title
RDMA/siw: Fix potential NULL pointer dereference in header processing
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix potential NULL pointer dereference in header processing If siw_get_hdr() returns -EINVAL before set_rx_fpdu_context(), qp->rx_fpdu can be NULL. The error path in siw_tcp_rx_data() dereferences qp->rx_fpdu->more_ddp_segs without checking, which may lead to a NULL pointer deref. Only check more_ddp_segs when rx_fpdu is present. KASAN splat: [ 101.384271] KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] [ 101.385869] RIP: 0010:siw_tcp_rx_data+0x13ad/0x1e50
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < ab61841633d10e56a58c1493a262f0d02dba2f5e (git)
Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 8564dcc12fbb372d984ab45768cae9335777b274 (git)
Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < ab957056192d6bd068b3759cb2077d859cca01f0 (git)
Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < ffba40b67663567481fa8a1ed5d2da36897c175d (git)
Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 87b7a036d2c73d5bb3ae2d47dee23de465db3355 (git)
Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 714c99e1dc8f85f446e05be02ba83972e981a817 (git)
Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < ce025f7f5d070596194315eb2e4e89d568b8a755 (git)
Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 14ab3da122bd18920ad57428f6cf4fade8385142 (git)
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    Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/siw/siw_qp_rx.c"
          ],
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              "versionType": "git"
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          ],
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          "vendor": "Linux",
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              "version": "5.3"
            },
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
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              "version": "6.19.4",
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              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Fix potential NULL pointer dereference in header processing\n\nIf siw_get_hdr() returns -EINVAL before set_rx_fpdu_context(),\nqp-\u003erx_fpdu can be NULL. The error path in siw_tcp_rx_data()\ndereferences qp-\u003erx_fpdu-\u003emore_ddp_segs without checking, which\nmay lead to a NULL pointer deref. Only check more_ddp_segs when\nrx_fpdu is present.\n\nKASAN splat:\n[  101.384271] KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7]\n[  101.385869] RIP: 0010:siw_tcp_rx_data+0x13ad/0x1e50"
        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-13T06:02:58.748Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
        {
          "url": "https://git.kernel.org/stable/c/14ab3da122bd18920ad57428f6cf4fade8385142"
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      "title": "RDMA/siw: Fix potential NULL pointer dereference in header processing",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23242",
    "datePublished": "2026-03-18T10:05:05.108Z",
    "dateReserved": "2026-01-13T15:37:45.989Z",
    "dateUpdated": "2026-04-13T06:02:58.748Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-23242",
      "date": "2026-04-15",
      "epss": "0.00068",
      "percentile": "0.20955"
    },
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  }
}


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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.