CVE-2026-90417 (GCVE-0-2026-90417)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:09 – Updated: 2026-09-17 16:09
VLAI
Title
RDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry() When the device is in the fatal error state, write_tpt_entry() returns -EIO before handing the caller's preallocated skb to the transmit path; its allocation-failure returns do the same. c4iw_dereg_mr() ignores the error and frees mhp, leaking mhp->dereg_skb. c4iw_get_dma_mr() instead frees the skb a second time after dereg_mem() already consumed it, a double free. Make write_tpt_entry() the sole owner of a non-NULL skb, freeing it on every return preceding handoff to c4iw_ofld_send(): fatal error, tpt and stag allocation failure. c4iw_ofld_send() consumes the skb on success and error alike, so drop the redundant kfree_skb() in c4iw_get_dma_mr() after dereg_mem().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0f8ab0b6e91b4d5302ceee5ec12ce54d81297635 , < 6b15fc9bc117fb6597fa1c2cc30284aafe71101c (git)
Affected: 0f8ab0b6e91b4d5302ceee5ec12ce54d81297635 , < 373f3716a2de7adc739269ebb4d87e5bf4dc180c (git)
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Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/cxgb4/mem.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()\n\nWhen the device is in the fatal error state, write_tpt_entry() returns -EIO\nbefore handing the caller\u0027s preallocated skb to the transmit path; its\nallocation-failure returns do the same. c4iw_dereg_mr() ignores the error\nand frees mhp, leaking mhp-\u003edereg_skb. c4iw_get_dma_mr() instead frees the\nskb a second time after dereg_mem() already consumed it, a double free.\n\nMake write_tpt_entry() the sole owner of a non-NULL skb, freeing it on\nevery return preceding handoff to c4iw_ofld_send(): fatal error, tpt and\nstag allocation failure. c4iw_ofld_send() consumes the skb on success and\nerror alike, so drop the redundant kfree_skb() in c4iw_get_dma_mr() after\ndereg_mem()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:09:42.342Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        }
      ],
      "title": "RDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90417",
    "datePublished": "2026-09-17T16:09:42.342Z",
    "dateReserved": "2026-09-11T19:38:34.813Z",
    "dateUpdated": "2026-09-17T16:09:42.342Z",
    "state": "PUBLISHED"
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      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "RDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()",
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                "programFiles": [
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                ],
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Fix dereg_skb leak and double free in write_tpt_entry()\n\nWhen the device is in the fatal error state, write_tpt_entry() returns -EIO\nbefore handing the caller\u0027s preallocated skb to the transmit path; its\nallocation-failure returns do the same. c4iw_dereg_mr() ignores the error\nand frees mhp, leaking mhp-\u003edereg_skb. c4iw_get_dma_mr() instead frees the\nskb a second time after dereg_mem() already consumed it, a double free.\n\nMake write_tpt_entry() the sole owner of a non-NULL skb, freeing it on\nevery return preceding handoff to c4iw_ofld_send(): fatal error, tpt and\nstag allocation failure. c4iw_ofld_send() consumes the skb on success and\nerror alike, so drop the redundant kfree_skb() in c4iw_get_dma_mr() after\ndereg_mem()."
          }
        ],
        "id": "CVE-2026-90417",
        "lastModified": "2026-09-17T17:17:46.050",
        "metrics": {},
        "published": "2026-09-17T17:17:46.050",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "vulnStatus": "Received"
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      "current_release_date": "2026-09-22T16:28:19Z",
      "cve": "CVE-2026-90417",
      "id": "CVE-2026-90417",
      "initial_release_date": "2026-09-18T00:16:32Z",
      "product_status:known_affected": "331",
      "product_status:known_not_affected": "16",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-90417",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-90417.json",
      "version": "4"
    }
  }
}



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