CVE-2026-43113 (GCVE-0-2026-43113)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-08-05 12:26
VLAI
Title
wifi: wl1251: validate packet IDs before indexing tx_frames
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: wl1251: validate packet IDs before indexing tx_frames wl1251_tx_packet_cb() uses the firmware completion ID directly to index the fixed 16-entry wl->tx_frames[] array. The ID is a raw u8 from the completion block, and the callback does not currently verify that it fits the array before dereferencing it. Reject completion IDs that fall outside wl->tx_frames[] and keep the existing NULL check in the same guard. This keeps the fix local to the trust boundary and avoids touching the rest of the completion flow.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 , < 6509dbece7339dbc8980c706b9d623119a6de105 (git)
Affected: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 , < a8a11a876f0a97061ee5d9e61d0f5a0df7e241c7 (git)
Affected: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 , < e0dc1ad870d6788b049bfe1511ac75b2333a7550 (git)
Affected: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 , < b6ba1eacf276063ebeefbbae8056043c24f2efaf (git)
Affected: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 , < df15adc692a802636dd3f258fc7cca8bf7a0ed9a (git)
Affected: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 , < 8d7465be5163a923ee5d7459719ef5a021c1584a (git)
Affected: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 , < 26ee518695c484f75e3606d631278e84bd24ae02 (git)
Affected: 2f01a1f58889fbfeb68b1bc1b52e4197f3333490 , < 0fd56fad9c56356e7fa7a7c52e7ecbf807a44eb0 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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              "value": "AV:A - The vulnerable completion path belongs to a Wi-Fi driver and is reached through wl1251 transmit-completion processing after wireless activity. The highest defensible scenario is a radio-adjacent attacker influencing firmware TX results on the local Wi-Fi medium.\nAC:L - There is no race or hard timing requirement in the vulnerable callback. Once the TX-result path is reached, one completion record with an out-of-range u8 packet ID is enough to trigger the out-of-bounds access.\nPR:N - The TX completion interrupt path performs no attacker credential or authorization check before trusting the firmware completion ring. A radio-adjacent attacker does not need an account or local privileges on the victim.\nUI:N - Completion records are processed automatically by the driver when the device raises a TX-result interrupt. Exploitation does not require the victim to open a file, mount anything, or perform a deliberate action.\nS:U - The vulnerable component is a kernel Wi-Fi driver and the impacts are to the same kernel security authority. This is not a VM escape, IOMMU bypass, or cross-authority boundary crossing.\nC:H - The unchecked u8 index can read a pointer outside the fixed 16-entry tx_frames array and then treat that memory as an skb. As kernel memory corruption, this is defensibly scoreable as high confidentiality impact.\nI:H - The old code can write NULL back through wl-\u003etx_frames[result-\u003eid] out of bounds and can also mutate fields through a bogus skb pointer. That is kernel memory corruption with potential control-flow or data-integrity impact.\nA:H - An out-of-bounds pointer dereference or write in this kernel path can readily cause an oops, panic, or device/driver failure. Availability impact is therefore high."
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T15:01:18+00:00",
      "cve": "CVE-2026-43113",
      "id": "CVE-2026-43113",
      "initial_release_date": "2026-05-06T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: wl1251: validate packet IDs before indexing tx_frames",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43113.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-22T00:03:22Z",
      "cve": "CVE-2026-43113",
      "id": "CVE-2026-43113",
      "initial_release_date": "2026-05-07T02:18:11Z",
      "product_status:known_affected": "209",
      "product_status:known_not_affected": "29",
      "product_status:recommended": "98",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43113",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43113.json",
      "version": "6"
    }
  }
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.