CWE-416
AllowedUse After Free
Abstraction: Variant · Status: Stable
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
11089 vulnerabilities reference this CWE, most recent first.
GHSA-4GH8-R36V-MWV7
Vulnerability from github – Published: 2022-05-24 17:18 – Updated: 2022-10-06 00:00Use after free in speech recognizer in Google Chrome prior to 81.0.4044.113 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page.
{
"affected": [],
"aliases": [
"CVE-2020-6457"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-05-21T04:15:00Z",
"severity": "MODERATE"
},
"details": "Use after free in speech recognizer in Google Chrome prior to 81.0.4044.113 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page.",
"id": "GHSA-4gh8-r36v-mwv7",
"modified": "2022-10-06T00:00:43Z",
"published": "2022-05-24T17:18:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-6457"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2020/04/stable-channel-update-for-desktop_15.html"
},
{
"type": "WEB",
"url": "https://crbug.com/1067851"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2020/dsa-4714"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4GPP-V4J5-5HHG
Vulnerability from github – Published: 2026-09-15 15:32 – Updated: 2026-09-18 15:31Use-after-free in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3.
{
"affected": [],
"aliases": [
"CVE-2026-92026"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-15T13:16:53Z",
"severity": "HIGH"
},
"details": "Use-after-free in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3.",
"id": "GHSA-4gpp-v4j5-5hhg",
"modified": "2026-09-18T15:31:49Z",
"published": "2026-09-15T15:32:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-92026"
},
{
"type": "WEB",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2068378"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-90"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-92"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-93"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-94"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-95"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-96"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4GQ6-X7W4-C3GF
Vulnerability from github – Published: 2025-10-14 18:30 – Updated: 2025-10-14 18:30Use after free in Windows Bluetooth Service allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2025-59290"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-14T17:16:12Z",
"severity": "HIGH"
},
"details": "Use after free in Windows Bluetooth Service allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-4gq6-x7w4-c3gf",
"modified": "2025-10-14T18:30:36Z",
"published": "2025-10-14T18:30:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59290"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59290"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4GRR-HFJ2-299G
Vulnerability from github – Published: 2025-03-04 06:30 – Updated: 2025-03-04 06:30in OpenHarmony v5.0.2 and prior versions allow a local attacker arbitrary code execution in pre-installed apps through use after free. This vulnerability can be exploited only in restricted scenarios.
{
"affected": [],
"aliases": [
"CVE-2025-24301"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-04T04:15:15Z",
"severity": "LOW"
},
"details": "in OpenHarmony v5.0.2 and prior versions allow a local attacker arbitrary code execution in pre-installed apps through use after free. This vulnerability can be exploited only in restricted scenarios.",
"id": "GHSA-4grr-hfj2-299g",
"modified": "2025-03-04T06:30:34Z",
"published": "2025-03-04T06:30:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-24301"
},
{
"type": "WEB",
"url": "https://gitee.com/openharmony/security/blob/master/zh/security-disclosure/2025/2025-03.md"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-4GRV-37WF-JG36
Vulnerability from github – Published: 2024-09-28 09:30 – Updated: 2024-09-28 09:30Alpine Halo9 prh_l2_sar_data_ind Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Alpine Halo9 devices. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the prh_l2_sar_data_ind function. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of root.
Was ZDI-CAN-22945
{
"affected": [],
"aliases": [
"CVE-2024-23923"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-09-28T07:15:02Z",
"severity": "HIGH"
},
"details": "Alpine Halo9 prh_l2_sar_data_ind Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Alpine Halo9 devices. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the prh_l2_sar_data_ind function. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of root.\n\nWas ZDI-CAN-22945",
"id": "GHSA-4grv-37wf-jg36",
"modified": "2024-09-28T09:30:44Z",
"published": "2024-09-28T09:30:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-23923"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-24-844"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4GVC-39C7-C8J4
Vulnerability from github – Published: 2024-12-19 00:37 – Updated: 2024-12-19 00:37Acrobat Reader DC version 22.001.20085 (and earlier), 20.005.3031x (and earlier) and 17.012.30205 (and earlier) are affected by a use-after-free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
{
"affected": [],
"aliases": [
"CVE-2022-44518"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-19T00:15:06Z",
"severity": "HIGH"
},
"details": "Acrobat Reader DC version 22.001.20085 (and earlier), 20.005.3031x (and earlier) and 17.012.30205 (and earlier) are affected by a use-after-free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.",
"id": "GHSA-4gvc-39c7-c8j4",
"modified": "2024-12-19T00:37:36Z",
"published": "2024-12-19T00:37:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-44518"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb22-16.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4GVV-JQVC-49J6
Vulnerability from github – Published: 2026-05-08 15:31 – Updated: 2026-05-11 09:30In the Linux kernel, the following vulnerability has been resolved:
net: nexthop: fix percpu use-after-free in remove_nh_grp_entry
When removing a nexthop from a group, remove_nh_grp_entry() publishes the new group via rcu_assign_pointer() then immediately frees the removed entry's percpu stats with free_percpu(). However, the synchronize_net() grace period in the caller remove_nexthop_from_groups() runs after the free. RCU readers that entered before the publish still see the old group and can dereference the freed stats via nh_grp_entry_stats_inc() -> get_cpu_ptr(nhge->stats), causing a use-after-free on percpu memory.
Fix by deferring the free_percpu() until after synchronize_net() in the caller. Removed entries are chained via nh_list onto a local deferred free list. After the grace period completes and all RCU readers have finished, the percpu stats are safely freed.
{
"affected": [],
"aliases": [
"CVE-2026-43374"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-08T15:16:48Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: nexthop: fix percpu use-after-free in remove_nh_grp_entry\n\nWhen removing a nexthop from a group, remove_nh_grp_entry() publishes\nthe new group via rcu_assign_pointer() then immediately frees the\nremoved entry\u0027s percpu stats with free_percpu(). However, the\nsynchronize_net() grace period in the caller remove_nexthop_from_groups()\nruns after the free. RCU readers that entered before the publish still\nsee the old group and can dereference the freed stats via\nnh_grp_entry_stats_inc() -\u003e get_cpu_ptr(nhge-\u003estats), causing a\nuse-after-free on percpu memory.\n\nFix by deferring the free_percpu() until after synchronize_net() in the\ncaller. Removed entries are chained via nh_list onto a local deferred\nfree list. After the grace period completes and all RCU readers have\nfinished, the percpu stats are safely freed.",
"id": "GHSA-4gvv-jqvc-49j6",
"modified": "2026-05-11T09:30:30Z",
"published": "2026-05-08T15:31:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43374"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9e08ad731862b22a87cc55f752e16d66cdc9e231"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ab5ebab9664214ba41a7633cb4e72f128204f924"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/abf4feaee6405f1441929c6ebe7a250f2cd170a7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b2662e7593e94ae09b1cf7ee5f09160a3612bcb2"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4GW3-Q7JJ-GWV5
Vulnerability from github – Published: 2026-09-30 18:33 – Updated: 2026-09-30 18:33NVIDIA GPU Display Driver for Windows and Linux contains a vulnerability where an unprivileged user may cause a use-after-free condition by issuing a sequence of driver commands. A successful exploit of this vulnerability might lead to code execution, escalation of privileges, denial of service, and information disclosure.
{
"affected": [],
"aliases": [
"CVE-2026-47589"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-30T16:17:28Z",
"severity": "HIGH"
},
"details": "NVIDIA GPU Display Driver for Windows and Linux contains a vulnerability where an unprivileged user may cause a use-after-free condition by issuing a sequence of driver commands. A successful exploit of this vulnerability might lead to code execution, escalation of privileges, denial of service, and information disclosure.",
"id": "GHSA-4gw3-q7jj-gwv5",
"modified": "2026-09-30T18:33:46Z",
"published": "2026-09-30T18:33:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47589"
},
{
"type": "WEB",
"url": "https://github.com/NVIDIA/product-security/tree/main/2026/5861"
},
{
"type": "WEB",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-47589"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4GXW-5W55-6F5H
Vulnerability from github – Published: 2025-02-27 03:34 – Updated: 2026-05-12 15:30In the Linux kernel, the following vulnerability has been resolved:
padata: avoid UAF for reorder_work
Although the previous patch can avoid ps and ps UAF for _do_serial, it can not avoid potential UAF issue for reorder_work. This issue can happen just as below:
crypto_request crypto_request crypto_del_alg padata_do_serial ... padata_reorder // processes all remaining // requests then breaks while (1) { if (!padata) break; ... }
padata_do_serial
// new request added
list_add
// sees the new request
queue_work(reorder_work)
padata_reorder
queue_work_on(squeue->work)
...
<kworker context>
padata_serial_worker
// completes new request,
// no more outstanding
// requests
crypto_del_alg
// free pd
invoke_padata_reorder // UAF of pd
To avoid UAF for 'reorder_work', get 'pd' ref before put 'reorder_work' into the 'serial_wq' and put 'pd' ref until the 'serial_wq' finish.
{
"affected": [],
"aliases": [
"CVE-2025-21726"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-27T02:15:16Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\npadata: avoid UAF for reorder_work\n\nAlthough the previous patch can avoid ps and ps UAF for _do_serial, it\ncan not avoid potential UAF issue for reorder_work. This issue can\nhappen just as below:\n\ncrypto_request\t\t\tcrypto_request\t\tcrypto_del_alg\npadata_do_serial\n ...\n padata_reorder\n // processes all remaining\n // requests then breaks\n while (1) {\n if (!padata)\n break;\n ...\n }\n\n\t\t\t\tpadata_do_serial\n\t\t\t\t // new request added\n\t\t\t\t list_add\n // sees the new request\n queue_work(reorder_work)\n\t\t\t\t padata_reorder\n\t\t\t\t queue_work_on(squeue-\u003ework)\n...\n\n\t\t\t\t\u003ckworker context\u003e\n\t\t\t\tpadata_serial_worker\n\t\t\t\t// completes new request,\n\t\t\t\t// no more outstanding\n\t\t\t\t// requests\n\n\t\t\t\t\t\t\tcrypto_del_alg\n\t\t\t\t\t\t\t // free pd\n\n\u003ckworker context\u003e\ninvoke_padata_reorder\n // UAF of pd\n\nTo avoid UAF for \u0027reorder_work\u0027, get \u0027pd\u0027 ref before put \u0027reorder_work\u0027\ninto the \u0027serial_wq\u0027 and put \u0027pd\u0027 ref until the \u0027serial_wq\u0027 finish.",
"id": "GHSA-4gxw-5w55-6f5h",
"modified": "2026-05-12T15:30:46Z",
"published": "2025-02-27T03:34:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21726"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4c6209efea2208597dbd3e52dc87a0d1a8f2dbe1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6f45ef616775b0ce7889b0f6077fc8d681ab30bc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7000507bb0d2ceb545c0a690e0c707c897d102c2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a54091c24220a4cd847d5b4f36d678edacddbaf0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dd7d37ccf6b11f3d95e797ebe4e9e886d0332600"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4H3R-H8C5-46CF
Vulnerability from github – Published: 2026-09-29 15:31 – Updated: 2026-09-29 15:31PyPy before versions 3.11.16 and 3.12.14 contains a use-after-free vulnerability in the pyexpat module's ExternalEntityParserCreate function that allows attackers to corrupt memory by supplying a crafted XML document to applications that create external-entity sub-parsers without retaining a reference to the parent parser. The child parser retains a raw C back-pointer to the parent parser struct while PyPy's tracing garbage collector can free the parent's C struct, causing bundled libexpat to dereference the freed pointer on every parsed token, producing memory corruption.
{
"affected": [],
"aliases": [
"CVE-2026-76875"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-29T13:17:52Z",
"severity": "MODERATE"
},
"details": "PyPy before versions 3.11.16 and 3.12.14 contains a use-after-free vulnerability in the pyexpat module\u0027s ExternalEntityParserCreate function that allows attackers to corrupt memory by supplying a crafted XML document to applications that create external-entity sub-parsers without retaining a reference to the parent parser. The child parser retains a raw C back-pointer to the parent parser struct while PyPy\u0027s tracing garbage collector can free the parent\u0027s C struct, causing bundled libexpat to dereference the freed pointer on every parsed token, producing memory corruption.",
"id": "GHSA-4h3r-h8c5-46cf",
"modified": "2026-09-29T15:31:45Z",
"published": "2026-09-29T15:31:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76875"
},
{
"type": "WEB",
"url": "https://doc.pypy.org/release-v8.0.0.html"
},
{
"type": "WEB",
"url": "https://github.com/pypy/pypy/releases/tag/release-pypy3.11-v8.0.0"
},
{
"type": "WEB",
"url": "https://github.com/pypy/pypy/releases/tag/release-pypy3.12-v8.0.0"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/pypy-pyexpat-externalentityparsercreate-use-after-free"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
Mitigation
Strategy: Language Selection
Choose a language that provides automatic memory management.
Mitigation
Strategy: Attack Surface Reduction
When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.
No CAPEC attack patterns related to this CWE.