FKIE_CVE-2026-90417

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-10-30 13:20
Severity
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().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26c6e9bc0b907b880c5d8486291f0452c8227fbe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2fcd26f4680143e9ec477069530548dbe20fce6f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/373f3716a2de7adc739269ebb4d87e5bf4dc180c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/379cf06e6fe34af980064c6ccaf15d8e26ec4a42
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/68c1d2c085f205e8a5338bc3d3304f897deca4d9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b15fc9bc117fb6597fa1c2cc30284aafe71101c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/cxgb4/mem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "26c6e9bc0b907b880c5d8486291f0452c8227fbe",
              "status": "affected",
              "version": "0f8ab0b6e91b4d5302ceee5ec12ce54d81297635",
              "versionType": "git"
            },
            {
              "lessThan": "68c1d2c085f205e8a5338bc3d3304f897deca4d9",
              "status": "affected",
              "version": "0f8ab0b6e91b4d5302ceee5ec12ce54d81297635",
              "versionType": "git"
            },
            {
              "lessThan": "379cf06e6fe34af980064c6ccaf15d8e26ec4a42",
              "status": "affected",
              "version": "0f8ab0b6e91b4d5302ceee5ec12ce54d81297635",
              "versionType": "git"
            },
            {
              "lessThan": "2fcd26f4680143e9ec477069530548dbe20fce6f",
              "status": "affected",
              "version": "0f8ab0b6e91b4d5302ceee5ec12ce54d81297635",
              "versionType": "git"
            },
            {
              "lessThan": "6b15fc9bc117fb6597fa1c2cc30284aafe71101c",
              "status": "affected",
              "version": "0f8ab0b6e91b4d5302ceee5ec12ce54d81297635",
              "versionType": "git"
            },
            {
              "lessThan": "373f3716a2de7adc739269ebb4d87e5bf4dc180c",
              "status": "affected",
              "version": "0f8ab0b6e91b4d5302ceee5ec12ce54d81297635",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/cxgb4/mem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.114",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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": "2026-10-30T13:20:52.660",
  "metrics": {},
  "published": "2026-09-17T17:17:46.050",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/26c6e9bc0b907b880c5d8486291f0452c8227fbe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2fcd26f4680143e9ec477069530548dbe20fce6f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/373f3716a2de7adc739269ebb4d87e5bf4dc180c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/379cf06e6fe34af980064c6ccaf15d8e26ec4a42"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/68c1d2c085f205e8a5338bc3d3304f897deca4d9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6b15fc9bc117fb6597fa1c2cc30284aafe71101c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.