CVE-2026-68353 (GCVE-0-2026-68353)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-19 16:33
VLAI
Title
wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler The firmware-controlled num_msg field (u8, 0-255) drives the loop in ath6kl_wmi_tx_complete_event_rx() without validation against the buffer length. This allows out-of-bounds reads of up to 1020 bytes past the WMI event buffer when the firmware sends an inflated num_msg. Add a check that the buffer is large enough to hold the fixed struct and the num_msg variable-length entries.
Severity
8.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bdcd81707973cf8aa9305337166f8ee842a050d4 , < 5297299c3fa6133275db0be99d69cd759b6cbfe9 (git)
Affected: bdcd81707973cf8aa9305337166f8ee842a050d4 , < 35196a07603f8c94a4943093bc26d5b5826285f8 (git)
Affected: bdcd81707973cf8aa9305337166f8ee842a050d4 , < 0e0fc04af9b443c6b425f00fb604ff599bc80d1d (git)
Affected: bdcd81707973cf8aa9305337166f8ee842a050d4 , < 69ac7ba3a3df6654e7daa82674575a8c4a1a63ea (git)
Affected: bdcd81707973cf8aa9305337166f8ee842a050d4 , < 289edc3c71344b89e6522891147cfb8f61b088bb (git)
Affected: bdcd81707973cf8aa9305337166f8ee842a050d4 , < eb636fbc443149b3501c3f97e26225ddcb314a0f (git)
Affected: bdcd81707973cf8aa9305337166f8ee842a050d4 , < c38b0d5c661951b5dd082bdf31f8a57a0ce6e540 (git)
Affected: bdcd81707973cf8aa9305337166f8ee842a050d4 , < 3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.2
Unaffected: 0 , < 3.2 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler\n\nThe firmware-controlled num_msg field (u8, 0-255) drives the loop in\nath6kl_wmi_tx_complete_event_rx() without validation against the buffer\nlength. This allows out-of-bounds reads of up to 1020 bytes past the\nWMI event buffer when the firmware sends an inflated num_msg.\n\nAdd a check that the buffer is large enough to hold the fixed struct\nand the num_msg variable-length entries."
        }
      ],
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
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              "lang": "en",
              "value": "AV:A - The vulnerable handler parses WMI control events delivered by the ath6kl AR600x wireless firmware over SDIO/USB; an attacker on the same wireless segment who subverts or influences the wireless device\u0027s firmware supplies the malformed event, matching the adjacent-network vector used for other ath driver event-parsing flaws.\nAC:L - Triggering requires only a WMI_TX_COMPLETE_EVENTID event whose payload is shorter than num_msg * 4 bytes; the loop bound is taken directly from the event with no validation, so the read happens deterministically every time.\nPR:N - The event is processed in the driver\u0027s asynchronous control-message receive path with no capability check, no syscall entry, and no authentication or association gate; the attacker needs no credentials on the target system.\nUI:N - The WMI event is handled automatically by the driver as soon as the interface is running; no victim action such as opening a file or issuing a command is needed.\nS:U - The out-of-bounds read stays within the kernel\u0027s own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Up to 1020 bytes past the event buffer are read and the contents are emitted through ath6kl_dbg() into the kernel log on debug builds, disclosing adjacent kernel heap data well beyond a small bounded read.\nI:N - The loop only reads and prints the out-of-bounds entries; there is no write to kernel memory and no attacker-controlled pointer is dereferenced for modification.\nA:H - The read can walk past the end of the slab allocation into unmapped or redzoned memory, producing an oops or a KASAN panic on hardened/debug kernels and thus a full loss of availability."
            }
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      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:33:58.283Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495"
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      ],
      "title": "wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler",
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    "dateReserved": "2026-07-30T09:28:09.385Z",
    "dateUpdated": "2026-08-19T16:33:58.283Z",
    "state": "PUBLISHED"
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      "date": "2026-08-20",
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This allows out-of-bounds reads of up to 1020 bytes past the\\nWMI event buffer when the firmware sends an inflated num_msg.\\n\\nAdd a check that the buffer is large enough to hold the fixed struct\\nand the num_msg variable-length entries.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/ath/ath6kl/wmi.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"bdcd81707973cf8aa9305337166f8ee842a050d4\",\"lessThan\":\"5297299c3fa6133275db0be99d69cd759b6cbfe9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdcd81707973cf8aa9305337166f8ee842a050d4\",\"lessThan\":\"35196a07603f8c94a4943093bc26d5b5826285f8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdcd81707973cf8aa9305337166f8ee842a050d4\",\"lessThan\":\"0e0fc04af9b443c6b425f00fb604ff599bc80d1d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdcd81707973cf8aa9305337166f8ee842a050d4\",\"lessThan\":\"69ac7ba3a3df6654e7daa82674575a8c4a1a63ea\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdcd81707973cf8aa9305337166f8ee842a050d4\",\"lessThan\":\"289edc3c71344b89e6522891147cfb8f61b088bb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdcd81707973cf8aa9305337166f8ee842a050d4\",\"lessThan\":\"eb636fbc443149b3501c3f97e26225ddcb314a0f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdcd81707973cf8aa9305337166f8ee842a050d4\",\"lessThan\":\"c38b0d5c661951b5dd082bdf31f8a57a0ce6e540\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdcd81707973cf8aa9305337166f8ee842a050d4\",\"lessThan\":\"3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/ath/ath6kl/wmi.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":8.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.2}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0e0fc04af9b443c6b425f00fb604ff599bc80d1d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/289edc3c71344b89e6522891147cfb8f61b088bb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/35196a07603f8c94a4943093bc26d5b5826285f8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5297299c3fa6133275db0be99d69cd759b6cbfe9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/69ac7ba3a3df6654e7daa82674575a8c4a1a63ea\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c38b0d5c661951b5dd082bdf31f8a57a0ce6e540\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb636fbc443149b3501c3f97e26225ddcb314a0f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-14T17:30:45+00:00",
      "cve": "CVE-2026-68353",
      "id": "CVE-2026-68353",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "156",
      "product_status:known_not_affected": "120",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68353.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-11T23:46:41Z",
      "cve": "CVE-2026-68353",
      "id": "CVE-2026-68353",
      "initial_release_date": "2026-08-11T23:46:41Z",
      "product_status:known_affected": "193",
      "product_status:known_not_affected": "103",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68353",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68353.json",
      "version": "2"
    }
  }
}



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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

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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.