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wifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: validate IEs in cfg80211_wext_siwgenie() The KASAN allocation trace shows that a malformed IE buffer is stored via SIOCSIWGENIE (cfg80211_wext_siwgenie()) without any validation. The crash trace shows that a subsequent SIOCSIWESSID triggers a connection attempt which calls cfg80211_sme_get_conn_ies() to process the stored IE buffer, causing: - An out-of-bounds read in skip_ie() which reads ies[pos+1] (the length byte) past the end of the 1-byte buffer. - An integer underflow in the memcpy size argument when offs returned by ieee80211_ie_split() exceeds ies_len, causing unsigned subtraction to wrap to SIZE_MAX and triggering a fortify panic. Fix this by validating the IE buffer in cfg80211_wext_siwgenie() before storing it. [drop unnecessary ie_len check, update commit message]

Announced Source revision 1
Original source ↗

CVE-2026-93784

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-2026-93784

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": "f21293549f60f88c74fcb9944737f11048896dc4",
        "lessThan": "269498ce6c1e2132b072aa0c8660404926008f03",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f21293549f60f88c74fcb9944737f11048896dc4",
        "lessThan": "685082f4be77f4657b498ebbe9f942ef65c492cf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f21293549f60f88c74fcb9944737f11048896dc4",
        "lessThan": "8b921a8993469a3482e0c67b5ce5cb6ce93f5f61",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f21293549f60f88c74fcb9944737f11048896dc4",
        "lessThan": "d01f1600e8b075aa17adb751ac9881bb6ee40dcc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f21293549f60f88c74fcb9944737f11048896dc4",
        "lessThan": "c970879e03b23a27df42caf7ba506485a165fb96",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f21293549f60f88c74fcb9944737f11048896dc4",
        "lessThan": "01cc395cecfaa73134d39fb9a401d9605d8bb2c5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f21293549f60f88c74fcb9944737f11048896dc4",
        "lessThan": "a2f5286ca4f304d3fd469f01b96b518608912a5c",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/wireless/wext-sme.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.32"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.32",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/wireless/wext-sme.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-93784

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#8262 · Revision 1
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Publisher date
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