ieee802154: hwsim: serialize pib updates to fix double-free
In the Linux kernel, the following vulnerability has been resolved: ieee802154: hwsim: serialize pib updates to fix double-free hwsim_update_pib() does an unserialized read-swap-free of phy->pib: pib_old = rtnl_dereference(phy->pib); ... rcu_assign_pointer(phy->pib, pib); kfree_rcu(pib_old, rcu); It assumes the RTNL is held, but ->set_channel is not always called under it: the mac802154 scan worker changes channels via drv_set_channel() without the RTNL. Such an update can race an RTNL-held one on the same phy; both read the same pib_old and both kfree_rcu() it, double-freeing the object. With SLUB percpu sheaves batching kfree_rcu(), this surfaces as a KASAN invalid-free in rcu_free_sheaf(). struct hwsim_phy has no lock for pib. Add one and make the swap atomic with rcu_replace_pointer() under it, dropping the misleading rtnl_dereference().
CVE-2026-97599
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-2026-97599
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": "f25da51fdc381ca2863248c7060b3662632f0872",
"lessThan": "e3b4681197aa026bd2d79358de5a3d62b76b04b9",
"versionType": "git"
},
{
"status": "affected",
"version": "f25da51fdc381ca2863248c7060b3662632f0872",
"lessThan": "9973b3a67a7592a780ea12b08334539a900deec1",
"versionType": "git"
},
{
"status": "affected",
"version": "f25da51fdc381ca2863248c7060b3662632f0872",
"lessThan": "d3b8f264ce09573aededd0a97dc41c8147797d8f",
"versionType": "git"
},
{
"status": "affected",
"version": "f25da51fdc381ca2863248c7060b3662632f0872",
"lessThan": "db6442deecb1f13aeaf4f9d77746ea7555630fb3",
"versionType": "git"
},
{
"status": "affected",
"version": "f25da51fdc381ca2863248c7060b3662632f0872",
"lessThan": "979d5b8de8ed4e1f997aef12da5694b99be7b871",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ieee802154/mac802154_hwsim.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.19",
"versionType": "semver"
},
{
"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": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ieee802154/mac802154_hwsim.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97599
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38040 · Revision 1
- Added to Heist Feed
- Publisher date