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wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication The firmware-controlled rsp->count field is used as the loop bound for indexing into the flexible rsp->regs[] array without validation against the message length. A count exceeding the actual data causes out-of- bounds reads from the heap-allocated message buffer. Add a check that count fits within the received message.

Announced Group revision 1
Original source ↗

CVE-2026-74340

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-74340

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "43efa3c0f241e04862be8e6a68ff765d36cde1ba",
        "lessThan": "22b0b8572a64362531dd0ed499b75e16282aeb2b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43efa3c0f241e04862be8e6a68ff765d36cde1ba",
        "lessThan": "3cf92b44c4fb88a5e8de8733a4494c0956606bca",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43efa3c0f241e04862be8e6a68ff765d36cde1ba",
        "lessThan": "0907c06dccae9e3c8d5a68eb9014beec73a36e79",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43efa3c0f241e04862be8e6a68ff765d36cde1ba",
        "lessThan": "64228dfc4247aca178c01e5a37af7d8dcc7a6089",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43efa3c0f241e04862be8e6a68ff765d36cde1ba",
        "lessThan": "23d210877968657bd07e1a517e0b516db20a1d80",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43efa3c0f241e04862be8e6a68ff765d36cde1ba",
        "lessThan": "f03782f7f41f2afee5076a1ef08ced5649218771",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43efa3c0f241e04862be8e6a68ff765d36cde1ba",
        "lessThan": "f987efff29a5fe45320ea5991c9d5cb98b676953",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43efa3c0f241e04862be8e6a68ff765d36cde1ba",
        "lessThan": "df2187acfca6c6cca372c5d35f42394d9c270b09",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/ath/wcn36xx/smd.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.11"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.11",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/ath/wcn36xx/smd.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74340

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#33104 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-74340 · Revision 1Source updated