Common Weakness Enumeration
CWE-415
AllowedDouble Free
Abstraction: Variant · Status: Draft
The product calls free() twice on the same memory address.
337 vulnerabilities reference this CWE, most recent first.
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.
The error conditions are on the host-to-controller transmit path (controller send failure, or an unsupported H:4 packet type), so they are not driven directly by attacker-supplied radio bytes; a remote/adjacent peer can influence them only indirectly, e.g. by inducing controller TX failures under heavy link load. The consequence when reached is BLE-stack denial of service (crash / pool corruption) with possible further memory corruption, bounded to devices using one of these Bouffalo Lab on-chip controllers.
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
zephyr
CNA
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
eclipse
CNA
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-2026-11388 (GCVE-0-2026-11388)
Vulnerability from cvelistv5 – Published: 2026-09-22 17:50 – Updated: 2026-09-22 18:59
VLAI
EPSS
VEX
Title
Double Free vulnerability in RTI Connext Professional (Core Libraries) allows File Manipulation.
Summary
Double Free vulnerability in RTI Connext Professional (Core Libraries) allows File Manipulation. This issue affects Connext Professional: from 7.4.0 before 7.7.0.1, from 7.1.0 before 7.3.1.6.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 18:55 UTC
CWE
- CWE-415 - Double Free
Assigner
RTI
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RTI | Connext Professional |
Affected:
7.4.0 , < 7.7.0.1
(custom)
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Date Public
2026-09-15 17:48
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CVE-2026-10653 (GCVE-0-2026-10653)
Vulnerability from cvelistv5 – Published: 2026-06-30 16:20 – Updated: 2026-11-04 04:58
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
zephyr
CNA
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject | zephyr |
Affected:
2.7.0 , < 4.3.1
(semver)
Affected: 4.4.0 , < 4.4.2 (semver) |
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CVE-2026-8925 (GCVE-0-2026-8925)
Vulnerability from cvelistv5 – Published: 2026-07-03 06:15 – Updated: 2026-09-15 06:03
VLAI
EPSS
VEX
Title
SASL double-free
Summary
The curl logic that works with SASL authentication could end up cleaning up
the GSASL context *twice* without clearing the pointer in between, making it
`free()` the same pointer twice.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 17:03 UTC
CWE
- CWE-415 - Double Free
Assigner
curl
CNA
References
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| curl | curl |
Affected:
8.15.0 , < 8.16.1
(semver)
Affected: 8.17.0 , < 8.20.1 (semver) |
|
| curl | curl |
Affected:
ab650379a8c25ca952f651476d25b4cdd77bb3fc , < 3da249e1f0716c06644ed3522a37a8bf81808012
(git)
|
|
| curl | curl |
Affected:
8.20.0
Affected: 8.19.0 Affected: 8.18.0 Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 |
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CVE-2026-6794 (GCVE-0-2026-6794)
Vulnerability from cvelistv5 – Published: 2026-09-23 20:54 – Updated: 2026-09-25 03:55
VLAI
EPSS
VEX
Title
Multiple Vulnerabilities in IBM Concert Software
Summary
IBM Concert 1.0.0 through 3.0.0 has a double free vulnerability that exists due to incorrect memory management. A local attacker can exploit this flaw to corrupt heap memory and execute arbitrary code in the context of the affected process.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 00:00 UTC
CWE
- CWE-415 - Double Free
Assigner
ibm
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7288830 | vendor-advisorypatch |
Impacted products
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CVE-2026-5759 (GCVE-0-2026-5759)
Vulnerability from cvelistv5 – Published: 2026-10-09 04:04 – Updated: 2026-10-13 17:01
VLAI
EPSS
VEX
Title
Double free and use-after-free in FalkorDB RdbLoadDeletedNodes allows remote code execution via crafted RDB
Summary
A double free and use-after-free vulnerability in the RdbLoadDeletedNodes function of the RDB graph decoders (src/serializers/decoders/*/decode_graph_entities.c) in FalkorDB before 4.18.1 allows a remote attacker who can issue Redis replication commands (for example, against an instance with no password configured) to cause a denial of service or execute arbitrary code in the redis-server process by supplying a crafted RDB stream whose deleted-nodes buffer length is not a multiple of sizeof(NodeID). The length check relies on ASSERT(), which is compiled out in release builds, so the function continues after freeing the buffer, reading it and freeing it a second time.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 15:28 UTC
Assigner
securin
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FalkorDB/FalkorDB/pull/1843 | patch |
| https://github.com/FalkorDB/FalkorDB/commit/523d9… | patch |
| https://github.com/FalkorDB/FalkorDB/releases/tag… | release-notes |
Impacted products
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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
GitLab
CNA
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
VulDB
CNA
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
mongodb
CNA
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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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.