Description
Stack-based buffer overflow in the brcmf_cfg80211_start_ap function in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c in the Linux kernel before 4.7.5 allows local users to cause a denial of service (system crash) or possibly have unspecified other impact via a long SSID Information Element in a command to a Netlink socket.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.7.5-1 | — |
| Debian 13 | linux | 4.7.5-1 | — |
| Debian 12 | linux | 4.7.5-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux | 4.4.0-51.72 | USN-3146-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1038.45 | USN-3161-3 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1042.46 | USN-3161-4 |
| Ubuntu 14.04 LTS | linux | 3.13.0-103.150 | USN-3145-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-75.83~14.04.1 | — |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-51.72~14.04.1 | USN-3146-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | kernel-docs | 3.12.67-60.64.18.3 | SUSE-SU-2016:2912-1 |
| SLES 12 SP1 | kernel-xen +4 | 3.12.67-60.64.18.1 | SUSE-SU-2016:2912-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.66.1 | SUSE-SU-2017:0471-1, SUSE-SU-2016:2912-1 |
| SLES 12 | kgraft-patch-SLE12_Update_19 | 1-2.1 | SUSE-SU-2017:0471-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.67-60.64.18.1 | SUSE-SU-2016:2912-1 |
| SLES for SAP 12 | kernel-xen +3 | 3.12.61-52.66.1 | SUSE-SU-2017:0471-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_19 | 1-2.1 | SUSE-SU-2017:0471-1 |
| SLE Real Time 12 SP1 | kernel-rt +5 | 3.12.67-60.27.1 | SUSE-SU-2016:3304-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_9 | 1-6.3 | SUSE-SU-2016:2912-1 |
Advisories 8
- USN-3146-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3145-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3161-3 linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3161-4 linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3146-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:0471-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2912-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3304-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
References
- USN-3146-2 vendor-advisory
- https://github.com/torvalds/linux/commit/ded89912156b1a47d940a0c954c43afbabd0c42c
- USN-3146-1 vendor-advisory
- USN-3145-1 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ded89912156b1a47d940a0c954c43afbabd0c42c
- [oss-security] 20161013 Re: CVE Request -- Broadcom Wifi Driver Brcmfmac brcmf_cfg80211_start_ap Buffer Overflow mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1384403
- USN-3145-2 vendor-advisory
- 93541 vdb-entry
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.5