wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb ieee80211_invoke_fast_rx() reads RX status through IEEE80211_SKB_RXCB(skb), which aliases the same skb->cb storage that ieee80211_rx_mesh_data() reuses as IEEE80211_TX_INFO. In the unicast forward path, mesh_data does: info = IEEE80211_SKB_CB(fwd_skb); memset(info, 0, sizeof(*info)); on the same skb the caller still names via rx->skb, then either queues the skb for TX (success) or kfree_skb()'s it (no-route) before returning RX_QUEUED. The caller's RX_QUEUED arm then calls sta_stats_encode_rate(status) on memory that is either zeroed (success path) or freed (no-route path). The latter is KASAN slab-use-after-free in ieee80211_prepare_and_rx_handle. Fix by encoding the rate from status before invoking ieee80211_rx_mesh_data(), so the RX_QUEUED arm consumes a value captured while status was still backed by valid memory.
CVE-2026-64117
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-2026-64117
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": "3468e1e0c639032a603450f0830ccabfa76f5806",
"lessThan": "5fe97797412aa8bc0184f78379fafb594bcb7f66",
"versionType": "git"
},
{
"status": "affected",
"version": "3468e1e0c639032a603450f0830ccabfa76f5806",
"lessThan": "0cd37e746e98ab0baa6d8b812955220775b080d6",
"versionType": "git"
},
{
"status": "affected",
"version": "3468e1e0c639032a603450f0830ccabfa76f5806",
"lessThan": "a2650f8461cd8ba287fee2992b36abe733c2bd5e",
"versionType": "git"
},
{
"status": "affected",
"version": "3468e1e0c639032a603450f0830ccabfa76f5806",
"lessThan": "2fb64f94f9afb774f2fa0c7835727d7a67f89f07",
"versionType": "git"
},
{
"status": "affected",
"version": "3468e1e0c639032a603450f0830ccabfa76f5806",
"lessThan": "d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349",
"versionType": "git"
}
],
"programFiles": [
"net/mac80211/rx.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.11",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mac80211/rx.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64117
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46422 · Revision 1
- Added to Heist Feed
- Publisher date