wifi: brcmfmac: cyw: fix heap overflow on a short auth frame
Published Aug 15, 2026
8.8
HIGHCVSS 3.1
EPSS 0.35%
Description
brcmf_notify_auth_frame_rx() takes the frame length from the firmware event and copies the frame body with the management header offset subtracted:
u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data); ... memcpy(&mgmt_frame->u, frame, mgmt_frame_len - offsetof(struct ieee80211_mgmt, u));
The only length check is e->datalen >= sizeof(*rxframe), so mgmt_frame_len can be anything from 0 up. offsetof(struct ieee80211_mgmt, u) is 24. When mgmt_frame_len is below that, the subtraction wraps as an unsigned value to a huge length. The memcpy then runs far past the kzalloc'd buffer. A malicious or malfunctioning AP can make the frame short during the external SAE auth exchange, so this is a remotely triggered heap overflow.
Reject frames shorter than the management header offset before the copy.
Affected products
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 6.16StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<6.16
- Version 6.18.40StatusunaffectedConstraints<=6.18.*
- Version 7.1.5StatusunaffectedConstraints<=7.1.*
- Version 7.2StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
No data.
No data.
Red Hat Enterprise Linux 9
kernel-0:5.14.0-687.49.1.el9_8
Fixed · RHSA-2026:68570
Red Hat Enterprise Linux 9
kernel-0:5.14.0-687.49.1.el9_8
Fixed · RHSA-2026:68570
Red Hat Enterprise Linux 10
kernel
Affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-687.49.1.el9_8 | Fixed | RHSA-2026:68570 |
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-687.49.1.el9_8 | Fixed | RHSA-2026:68570 |
| Red Hat Enterprise Linux 10 | kernel | Affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.35% (0.00349) | 26.07th | v5 (v2026.06.15) |
| Aug 15, 2026 | 0.21% (0.00214) | 11.97th | v5 (v2026.06.15) |
References (8)
- https://access.redhat.com/security/cve/CVE-2026-72003 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2516679 Issue Tracking
- https://git.kernel.org/stable/c/185bb156c427d0f865d344a6d0eaa02c6d05cc57
- https://git.kernel.org/stable/c/240c8d2c717b3f8153e7e877b22a82518d78dbdc
- https://git.kernel.org/stable/c/55b26abb1fa1ec406b3ad11b43c49c7624257565
- https://lore.kernel.org/linux-cve-announce/2026081506-CVE-2026-72003-d5f1@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2026-72003
- https://www.cve.org/CVERecord?id=CVE-2026-72003
Change history (0)
No recorded changes yet.