wifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()
Summary
| CVE | CVE-2026-93784 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-24 17:17:11 UTC |
| Updated | 2026-10-03 11:17:47 UTC |
| Description | 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] |
Risk And Classification
EPSS: 0.001730000 probability, percentile 0.060240000 (date 2026-10-05)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected f21293549f60f88c74fcb9944737f11048896dc4 269498ce6c1e2132b072aa0c8660404926008f03 git | Not specified |
| CNA | Linux | Linux | affected f21293549f60f88c74fcb9944737f11048896dc4 685082f4be77f4657b498ebbe9f942ef65c492cf git | Not specified |
| CNA | Linux | Linux | affected f21293549f60f88c74fcb9944737f11048896dc4 8b921a8993469a3482e0c67b5ce5cb6ce93f5f61 git | Not specified |
| CNA | Linux | Linux | affected f21293549f60f88c74fcb9944737f11048896dc4 d01f1600e8b075aa17adb751ac9881bb6ee40dcc git | Not specified |
| CNA | Linux | Linux | affected f21293549f60f88c74fcb9944737f11048896dc4 c970879e03b23a27df42caf7ba506485a165fb96 git | Not specified |
| CNA | Linux | Linux | affected f21293549f60f88c74fcb9944737f11048896dc4 01cc395cecfaa73134d39fb9a401d9605d8bb2c5 git | Not specified |
| CNA | Linux | Linux | affected f21293549f60f88c74fcb9944737f11048896dc4 a2f5286ca4f304d3fd469f01b96b518608912a5c git | Not specified |
| CNA | Linux | Linux | affected 2.6.32 | Not specified |
| CNA | Linux | Linux | unaffected 2.6.32 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.271 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.222 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.189 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.158 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.111 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.53 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/c970879e03b23a27df42caf7ba506485a165fb96 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8b921a8993469a3482e0c67b5ce5cb6ce93f5f61 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/01cc395cecfaa73134d39fb9a401d9605d8bb2c5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a2f5286ca4f304d3fd469f01b96b518608912a5c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d01f1600e8b075aa17adb751ac9881bb6ee40dcc | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/685082f4be77f4657b498ebbe9f942ef65c492cf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/269498ce6c1e2132b072aa0c8660404926008f03 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.