Common Weakness Enumeration
CWE-415
AllowedDouble Free
Abstraction: Variant · Status: Draft
The product calls free() twice on the same memory address.
1013 vulnerabilities reference this CWE, most recent first.
CVE-2026-12659 (GCVE-0-2026-12659)
Vulnerability from cvelistv5 – Published: 2026-07-14 15:14 – Updated: 2026-07-14 15:57
VLAI
EPSS
VEX
Title
Rockwell Automation Flex 5000® Adapter - Denial of Service
Summary
A denial-of-service security issue exists in the affected products. The security issue stems from improper handling of exceptional conditions when processing crafted CIP packets sent to the adapter. A power cycle is required to recover the module and associated I/O.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-14 15:57 UTC
CWE
- CWE-415 - Double free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Rockwell Automation | The FLEX 5000® EtherNet/IP Adapter |
Affected:
version 6.011
|
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CVE-2026-12043 (GCVE-0-2026-12043)
Vulnerability from cvelistv5 – Published: 2026-06-12 18:35 – Updated: 2026-06-12 18:49
VLAI
EPSS
VEX
Title
Heap double-free in AWS Common Runtime aws-c-http
Summary
Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library might allow a remote threat actor operating a server to cause memory corruption on a connecting client application, potentially leading to arbitrary code execution, via a crafted sequence of HTTP/2 HEADERS frames.
To remediate this issue, users should upgrade to aws-c-http version 0.11.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-12 18:49 UTC
CWE
- CWE-415 - Double free
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/awslabs/aws-c-http/releases/ta… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/awslabs/aws-c-http/security/ad… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | aws-c-http |
Affected:
0.4.22 , ≤ 0.10.15
(custom)
cpe:2.3:a:aws:aws-c-http:*:*:*:*:*:*:*:* |
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CVE-2026-11894 (GCVE-0-2026-11894)
Vulnerability from cvelistv5 – Published: 2026-08-11 05:08 – Updated: 2026-08-11 17:04
VLAI
EPSS
VEX
Title
Double-free / use-after-free in Realtek BEE Bluetooth HCI driver `send()` error paths
Summary
The Realtek BEE Bluetooth HCI driver's send callback, bt_hci_bee_send() in drivers/bluetooth/hci/hci_bee.c, violated the bt_hci_driver_api buffer-ownership contract. That contract requires the driver to consume (unref) the transmit net_buf only on success; on an error return the host caller retains ownership and unrefs the buffer itself. The pre-fix code routed all error paths through a shared cleanup label that unconditionally called net_buf_unref(buf) before returning the error code.
Because the host TX paths (in subsys/bluetooth/host/hci_core.c) unref the buffer again after send() returns an error, the buffer is freed twice: the driver returns it to its net_buf pool and the host then unrefs the already-freed buffer, corrupting the shared pool / underflowing the reference count (CWE-415). The same error branch additionally dereferenced buf->len inside a LOG_ERR call after the buffer had already been unref'd, a read of freed memory (CWE-416) that is compiled in at the default error log level.
The failing edges are reached when the controller's host-to-controller buffer allocation fails or the controller send fails (resource-exhaustion / IO conditions). A remote Bluetooth peer can push the device toward these conditions indirectly by driving heavy host transmit activity, at which point the double-free corrupts the host net_buf pool and most likely crashes the device, with residual potential for further memory corruption. The impact is confined to builds using this specific Realtek BEE HCI driver.
The fix returns early from each error path without unreffing and unrefs the buffer only on the success path, restoring the ownership contract and eliminating both the double-free and the use-after-free read.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 17:04 UTC
CWE
- CWE-415 - use-after-free
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
4.4.0 , < 4.4.2
(semver)
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CVE-2026-11893 (GCVE-0-2026-11893)
Vulnerability from cvelistv5 – Published: 2026-08-11 04:42 – Updated: 2026-08-11 17:06
VLAI
EPSS
VEX
Title
Double free / use-after-free in Bouffalo Lab HCI driver send() error paths (hci_bflb)
Summary
The Bluetooth HCI driver for Bouffalo Lab on-chip BLE controllers (BL60x/BL70x/BL61x), bt_bflb_send() in drivers/bluetooth/hci/hci_bflb.c, violates the bt_hci_driver_api.send() buffer-ownership contract. That contract (documented at include/zephyr/drivers/bluetooth.h) requires the buffer reference to be consumed only on success; on error the caller still owns the reference and unrefs it. The driver instead routed all error paths through a shared label that unconditionally called net_buf_unref(buf) before returning the error code, consuming the buffer on failure as well.
When send() returns an error, the host TX path (send_buf() in subsys/bluetooth/host/conn.c) unrefs the same buffer again, believing it still owns it. This double-unref over-decrements the net_buf reference count. Because the buffer is a TX fragment whose destroy callback also decrements its still-queued parent buffer, the parent is freed prematurely while reachable on the connection TX queue, producing a use-after-free and corruption of the shared net_buf pool rather than a benign leak.
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Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 17:06 UTC
CWE
- CWE-415 - use-after-free
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
4.4.0 , < 4.4.2
(semver)
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CVE-2026-11576 (GCVE-0-2026-11576)
Vulnerability from cvelistv5 – Published: 2026-06-19 08:27 – Updated: 2026-06-22 15:11
VLAI
EPSS
VEX
Summary
The security fix for CVE-2025-0728 in eclipse-threadx NetX Duo refactors error handling in the HTTP server PUT process to use a shared cleanup label, but this unified cleanup path unconditionally calls fx_file_close() even when the file was never successfully opened. Multiple error branches jump to the shared cleanup label before any file open operation has occurred, causing fx_file_close() to operate on an uninitialized file handle, leading to undefined behavior, double-close issues, or memory corruption.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 15:11 UTC
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse ThreadX - NetX Duo |
Affected:
6.4.2 , ≤ 6.5.0.202601
(semver)
|
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CVE-2026-10653 (GCVE-0-2026-10653)
Vulnerability from cvelistv5 – Published: 2026-06-30 16:20 – Updated: 2026-08-06 20:20
VLAI
EPSS
VEX
Title
Non-atomic `net_buf` reference counts cause double-free / free-list corruption under concurrent unref
Summary
The Zephyr net_buf library (lib/net_buf/buf.c) manipulated both of its reference counts -- the per-header buf->ref and the per-data-block ref_count at the start of each variable/heap data allocation -- with plain non-atomic C operators (buf->ref++, if (--buf->ref > 0), if (--(*ref_count))).
The API is documented as self-synchronizing: callers may share one buffer across threads (e.g. via k_fifo) and each holder independently calls net_buf_unref() with no surrounding lock. Under true concurrency (SMP, or single-core preemption between the non-atomic load and store while another context unrefs the same buffer), two holders can both observe the same prior reference value and both conclude they are the last reference.
For heap/variable-data pools (mem_pool_data_unref/heap_data_unref, used by zbus message subscribers, the IP stack RX/TX buffers when CONFIG_NET_BUF_FIXED_DATA_SIZE=n, capture, wireguard, ISO-TP and usbip) this produces a double k_heap_free()/k_free() of the same block -- heap-metadata corruption and a use-after-free on the heap-hardening poison pattern.
For the per-header refcount the buffer is returned to the pool free LIFO twice for any pool type (including fixed-data pools used by Bluetooth and networking), corrupting the free list so a later allocation hands the same buffer to two owners.
The fix converts both refcounts to atomic_inc/atomic_dec (overlaying buf->ref in an atomic_t-sized union and changing the data-block refcount from uint8_t to atomic_t).
Impact is gated on genuine concurrency and on an application architecture that shares one buffer among multiple independent unref'ers; the trigger is a refcount/timing race rather than packet content, so an external attacker has at most weak indirect influence over the race window. Affects all Zephyr releases through v4.4.0.
This fix is not being backported to v3.7-branch (LTS). The backport was attempted and closed unmerged (#111181): the v3.7 networking tree has diverged from main, and the new atomic word-packing -- together with the assertions it adds -- turns pre-existing v3.7-only reference-counting defects elsewhere in the stack into hard faults, so landing the change faithfully would mean pulling an open-ended set of additional v3.7-only fixes into an LTS branch. v3.7 remains affected. Applications on v3.7 that share one net_buf across threads should serialize their own net_buf_unref() calls rather than rely on the documented self-synchronizing behaviour. The fix is on main and has been backported to v4.3-branch (#110852) and v4.4-branch (#110853).
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-30 16:41 UTC
CWE
- CWE-415 - use-after-free
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
2.7.0 , < 4.5.0
(semver)
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CVE-2026-5657 (GCVE-0-2026-5657)
Vulnerability from cvelistv5 – Published: 2026-04-30 05:38 – Updated: 2026-04-30 12:45
VLAI
EPSS
VEX
Title
Double Free in Wireshark
Summary
iLBC codec crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
Severity
5.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-30 12:45 UTC
CWE
- CWE-415 - Double Free
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.wireshark.org/security/wnpa-sec-2026-… | |
| https://gitlab.com/wireshark/wireshark/-/issues/21113 | issue-trackingpermissions-required |
| https://gitlab.com/wireshark/wireshark/-/work_ite… | exploit |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wireshark Foundation | Wireshark |
Affected:
4.6.0 , < 4.6.5
(semver)
Affected: 4.4.0 , < 4.4.15 (semver) |
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CVE-2026-5186 (GCVE-0-2026-5186)
Vulnerability from cvelistv5 – Published: 2026-03-31 07:30 – Updated: 2026-03-31 15:36
VLAI
EPSS
VEX
Title
Nothings stb Multi-frame GIF File stb_image.h stbi__load_gif_main double free
Summary
A weakness has been identified in Nothings stb up to 2.30. This impacts the function stbi__load_gif_main of the file stb_image.h of the component Multi-frame GIF File Handler. This manipulation causes double free. The attack requires local access. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 15:36 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/354254 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/354254/cti | signaturepermissions-required |
| https://vuldb.com/submit/780395 | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Nothings | stb |
Affected:
2.0
Affected: 2.1 Affected: 2.2 Affected: 2.3 Affected: 2.4 Affected: 2.5 Affected: 2.6 Affected: 2.7 Affected: 2.8 Affected: 2.9 Affected: 2.10 Affected: 2.11 Affected: 2.12 Affected: 2.13 Affected: 2.14 Affected: 2.15 Affected: 2.16 Affected: 2.17 Affected: 2.18 Affected: 2.19 Affected: 2.20 Affected: 2.21 Affected: 2.22 Affected: 2.23 Affected: 2.24 Affected: 2.25 Affected: 2.26 Affected: 2.27 Affected: 2.28 Affected: 2.29 Affected: 2.30 |
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CVE-2026-4358 (GCVE-0-2026-4358)
Vulnerability from cvelistv5 – Published: 2026-03-17 19:00 – Updated: 2026-03-17 20:08
VLAI
EPSS
VEX
Title
Memory safety issues in slot-based execution hash table spill
Summary
A specially crafted aggregation query with $lookup by an authenticated user with write privileges can cause a double-free or use-after-free memory issue in the slot-based execution (SBE) engine when an in-memory hash table is spilled to disk.
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-17 20:03 UTC
CWE
- CWE-415 - Double free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MongoDB Inc | MongoDB Server |
Affected:
8.2 , < 8.2.6
(custom)
Affected: 8.0 , < 8.0.20 (custom) Affected: 7.0 , < 7.0.31 (custom) |
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CVE-2025-68657 (GCVE-0-2025-68657)
Vulnerability from cvelistv5 – Published: 2026-01-12 17:26 – Updated: 2026-01-12 18:40
VLAI
EPSS
VEX
Title
espressif/usb_host_hid Double-Free Race Condition in USB Host HID Device Close Path
Summary
Espressif ESP-IDF USB Host HID (Human Interface Device) Driver allows access to HID devices. Prior to 1.1.0, calls to hid_host_device_close() can free the same usb_transfer_t twice. The USB event callback and user code share the hid_iface_t state without locking, so both can tear down a READY interface simultaneously, corrupting heap metadata inside the ESP USB host stack. This vulnerability is fixed in 1.1.0.
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-12 18:40 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/espressif/esp-usb/security/adv… | x_refsource_CONFIRM |
| https://github.com/espressif/esp-usb/commit/cd281… | x_refsource_MISC |
| https://components.espressif.com/components/espre… | x_refsource_MISC |
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Mitigation
Architecture and Design
Choose a language that provides automatic memory management.
Mitigation
Implementation
Ensure that each allocation is freed only once. After freeing a chunk, set the pointer to NULL to ensure the pointer cannot be freed again. In complicated error conditions, be sure that clean-up routines respect the state of allocation properly. If the language is object oriented, ensure that object destructors delete each chunk of memory only once.
Mitigation
Implementation
Use a static analysis tool to find double free instances.
No CAPEC attack patterns related to this CWE.