Bluetooth: ISO: zero the sockaddr before returning it in getname
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: zero the sockaddr before returning it in getname iso_sock_getname() fills a struct sockaddr_iso in place and returns its size without clearing it first, so bytes it does not write are copied to user space from the kernel stack. The getsockname(2) and getpeername(2) paths both run through do_getsockname(), which hands getname() an uninitialized sockaddr_storage on the stack and copies back up to the number of bytes getname() returns, so the driver has to initialize every byte it accounts for. Two ranges are left uninitialized: - struct sockaddr_iso is 10 bytes but only 9 are written (family, iso_bdaddr, iso_bdaddr_type), leaking the trailing pad byte on every call. - for a broadcast peer (BIS_LINK or PA_LINK) the returned length grows by sizeof(struct sockaddr_iso_bc), but only bc_sid, bc_num_bis and bc_bis are filled; bc_bdaddr and bc_bdaddr_type, the first 7 bytes of that structure, are never written. An unprivileged process can open a BTPROTO_ISO socket and reach the pad leak with getsockname(); the broadcast leak needs an established BIS/PA connection. l2cap and rfcomm already memset their sockaddr in getname for the same reason; do the same here.
CVE-2026-80761
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-2026-80761
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": "ccf74f2390d60a2f9a75ef496d2564abb478f46a",
"lessThan": "90be10604936c9042dc6238d8836abafca471811",
"versionType": "git"
},
{
"status": "affected",
"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a",
"lessThan": "554594d032aa4356ca4be75d0cb46e13d350dbd2",
"versionType": "git"
},
{
"status": "affected",
"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a",
"lessThan": "1f6d1f2611af0eb36b133a41d29ffd2cc2601615",
"versionType": "git"
},
{
"status": "affected",
"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a",
"lessThan": "9069be87c67f290783b332c4284e09fb89cb9ea7",
"versionType": "git"
},
{
"status": "affected",
"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a",
"lessThan": "190b719b787eb4ca6c25b12fab224806f9108b06",
"versionType": "git"
},
{
"status": "affected",
"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a",
"lessThan": "884cf2cc957da7ac178a0e6c6c69ddfec0481cc8",
"versionType": "git"
}
],
"programFiles": [
"net/bluetooth/iso.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.0",
"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": "6.18.47",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.11",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.1",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/iso.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80761
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46637 · Revision 1
- Added to Heist Feed
- Publisher date