Linux Kernel up to 6.18.46/7.1.10/7.2.0 Bluetooth ISO iso_sock_getname uninitialized pointer

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.41

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.18.46/7.1.10/7.2.0. The impacted element is the function iso_sock_getname of the component Bluetooth ISO. Performing a manipulation results in uninitialized pointer. This vulnerability is cataloged as CVE-2026-80761. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.18.46/7.1.10/7.2.0. This affects the function iso_sock_getname of the component Bluetooth ISO. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. CWE is classifying the issue as CWE-824. The product accesses or uses a pointer that has not been initialized. This is going to have an impact on confidentiality. The summary by CVE is:

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.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-80761 since 08/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/04/2026).

Upgrading to version 6.18.47, 7.1.11, 7.2.1 or 7.3-rc1 eliminates this vulnerability. Applying the patch 1f6d1f2611af0eb36b133a41d29ffd2cc2601615/9069be87c67f290783b332c4284e09fb89cb9ea7/190b719b787eb4ca6c25b12fab224806f9108b06/884cf2cc957da7ac178a0e6c6c69ddfec0481cc8 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Uninitialized pointer
CWE: CWE-824 / CWE-908
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.47/7.1.11/7.2.1/7.3-rc1
Patch: 1f6d1f2611af0eb36b133a41d29ffd2cc2601615/9069be87c67f290783b332c4284e09fb89cb9ea7/190b719b787eb4ca6c25b12fab224806f9108b06/884cf2cc957da7ac178a0e6c6c69ddfec0481cc8

Timelineinfo

08/26/2026 CVE reserved
09/04/2026 +9 days Advisory disclosed
09/04/2026 +0 days VulDB entry created
09/04/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80761 (🔒)
GCVE (CVE): GCVE-0-2026-80761
GCVE (VulDB): GCVE-100-398889

Entryinfo

Created: 09/04/2026 17:58
Changes: 09/04/2026 17:58 (59)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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