CVE-2026-12522
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk12th percentile - higher than 12% of all known CVEs
Summary
The HL7800 cellular modem driver contains a stack buffer overflow vulnerability in the on_cmd_atcmdinfo_ipaddr() function while processing +CGCONTRDP responses. The length of address fields (IP, mask, gateway, DNS) is derived from delimiter positions in network-supplied data and is not bounded against the destination buffer (64 bytes), allowing writes past temp_addr_str.
Risk Assessment
A malicious or impersonated cellular network (e.g., rogue base station) can remotely cause a device crash or control-flow hijacking in supervisor context, without requiring privileges or user interaction. This can lead to device integrity compromise and potential takeover of the modem.
Recommendation
Immediately update the HL7800 modem driver to a version containing the fix that bounds field lengths before copying. If a patch is unavailable, restrict trust in cellular networks and consider additional stack protection mechanisms (e.g., stack canaries) in firmware.
Related vulnerabilities
- CVE-2026-19117Critical
Under specific conditions, an attacker can register an attacker-controlled FIDO2 credential against a target account and then authenticate as that user. This issue affects on-premises deployments only.
- CVE-2026-66786Critical
In Submariner's cert-auth mode, connection configuration is built from unvalidated free-form strings from the CRD. A malicious cluster can publish a CableName with newlines and ipsec.conf directives, allowing injection of arbitrary configuration or command execution via leftupdown hooks, leading to remote code execution as root on the gateway node.
- CVE-2026-53671Critical
In the PREVAIL eBPF verifier before version 0.2.4, the abstract transformer treats writes through a T_CTX-typed base register as a silent no-op. An attacker can craft an eBPF program that overwrites a context field, reloads it as T_PACKET, and dereferences an attacker-controlled address, and PREVAIL will report the program as safe.
- CVE-2026-53670Critical
In the PREVAIL eBPF verifier before version 0.2.4, EbpfTransformer::add() silently skips offset-variable updates when the destination register carries a non-singleton typeset. Subsequent bounds checks use the stale offset and accept out-of-bounds memory accesses, so a crafted BPF program passes verification even though it would corrupt memory at runtime.
- CVE-2026-53649Critical
Joro before version 1.1.1 in default proxy mode exposes a local API on 127.0.0.1:9090 with no authentication and wildcard CORS. A malicious website can reach privileged endpoints, including uploading a native plugin and triggering a restart, leading to unauthenticated remote code execution as the operator's user.
- CVE-2026-20279Critical
A vulnerability in Cisco IOS XR Software relates to improper access control issues (CWE-284). It was discovered during an internal security review and addressed in software hardening releases.
- CVE-2026-20274Critical
A vulnerability in Cisco IOS XR Software relates to improper resource control issues (CWE-664). It was discovered during an internal security review and addressed in software hardening releases.
- CVE-2026-20212Critical
A vulnerability in the Silicon One integration for Cisco Nexus 9000 Series Switches allows an unauthenticated remote attacker to execute code with root privileges. TCP ports 43210 and 43211 are accessible in the default L3 VRF, and crafted input can lead to code execution or crash of the S1HAL process causing device reload.
- CVE-2026-53611Critical
Looking Glass prior to version 1.3.5 contains an OS Command Injection vulnerability resulting from an unanchored regular expression in the input validation layer. This issue has been patched in version 1.3.5.
- CVE-2026-82955Critical
In the current development version of Eclipse aeriOS, the KrakenD instance in the API Gateway had disable_jwk_security hard-coded to true, disabling TLS certificate verification when retrieving JWKS. This could allow an attacker to intercept communication and provide a malicious JWKS, compromising token validation. The issue has been fixed by making the parameter configurable and defaulting to false.
Original NVD description (English source)
The HL7800 cellular modem driver's +CGCONTRDP: response handler on_cmd_atcmdinfo_ipaddr() in drivers/modem/vendor_standalone/hl7800.c parses the PDP-context dynamic parameters (local address, subnet mask, gateway, and DNS servers) that the cellular network assigns to the device. The response is linearized into a 256-byte stack buffer, after which each address field length is computed from comma/. delimiter positions in the network-supplied data and used directly as the length argument to strncpy() into the fixed 64-byte stack buffer temp_addr_str (and the 16-byte iface_ctx.dns_v4_string). Because the field length is derived from attacker-controlled delimiter positions and was not bounded against the destination buffer, a single field can be far larger than 64 bytes. A malicious or impersonated cellular network (for example a rogue base station) can return a crafted +CGCONTRDP response with an overlong address field, causing strncpy() to write past temp_addr_str on the modem worker thread's stack, plus an out-of-bounds NUL write at temp_addr_str[addr_len]. No device-side privileges or user interaction are required: the device itself issues the AT+CGCONTRDP=1 query during normal network attach and parses whatever the network returns. The overflow corrupts adjacent stack memory in supervisor context, yielding at minimum a remotely triggerable crash and potentially control-flow hijacking on targets without stack protection. The fix bounds every field length against its destination buffer (temp_addr_str and dns_v4_string) before each copy, rejecting overlong fields.