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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
9858 vulnerabilities reference this CWE, most recent first.
GHSA-4439-7P27-RX63
Vulnerability from github – Published: 2023-11-09 00:33 – Updated: 2023-11-09 00:33A potential use-after-free vulnerability was reported in the Lenovo View driver that could result in denial of service.
{
"affected": [],
"aliases": [
"CVE-2023-4891"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-11-08T22:15:11Z",
"severity": "MODERATE"
},
"details": "\nA potential use-after-free vulnerability was reported in the Lenovo View driver that could result in denial of service. \n\n",
"id": "GHSA-4439-7p27-rx63",
"modified": "2023-11-09T00:33:56Z",
"published": "2023-11-09T00:33:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4891"
},
{
"type": "WEB",
"url": "https://support.lenovo.com/us/en/product_security/LEN-135344"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4449-MP9G-8844
Vulnerability from github – Published: 2024-11-12 18:30 – Updated: 2024-11-12 18:30Microsoft Excel Remote Code Execution Vulnerability
{
"affected": [],
"aliases": [
"CVE-2024-49027"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-12T18:15:42Z",
"severity": "HIGH"
},
"details": "Microsoft Excel Remote Code Execution Vulnerability",
"id": "GHSA-4449-mp9g-8844",
"modified": "2024-11-12T18:30:59Z",
"published": "2024-11-12T18:30:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49027"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49027"
}
],
"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-4456-4H4R-G935
Vulnerability from github – Published: 2022-05-24 17:38 – Updated: 2022-05-24 17:38Use after free in drag and drop in Google Chrome on Linux prior to 87.0.4280.141 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.
{
"affected": [],
"aliases": [
"CVE-2021-21107"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-01-08T19:15:00Z",
"severity": "CRITICAL"
},
"details": "Use after free in drag and drop in Google Chrome on Linux prior to 87.0.4280.141 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.",
"id": "GHSA-4456-4h4r-g935",
"modified": "2022-05-24T17:38:25Z",
"published": "2022-05-24T17:38:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21107"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop.html"
},
{
"type": "WEB",
"url": "https://crbug.com/1153595"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VVUWIJKZTZTG6G475OR6PP4WPQBVM6PS"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z6P6AVVFP7B2M4H7TJQBASRZIBLOTUFN"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202101-05"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2021/dsa-4832"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-445V-887F-XX48
Vulnerability from github – Published: 2026-07-14 18:32 – Updated: 2026-07-14 18:32Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-50688"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-14T18:18:04Z",
"severity": "HIGH"
},
"details": "Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-445v-887f-xx48",
"modified": "2026-07-14T18:32:30Z",
"published": "2026-07-14T18:32:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50688"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50688"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4462-822P-62R3
Vulnerability from github – Published: 2023-06-16 18:30 – Updated: 2024-04-04 04:55xlsxio v0.1.2 to v0.2.34 was discovered to contain a free of uninitialized pointer in the xlsxioread_sheetlist_close() function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted XLSX file.
{
"affected": [],
"aliases": [
"CVE-2023-34795"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-06-16T16:15:09Z",
"severity": "HIGH"
},
"details": "xlsxio v0.1.2 to v0.2.34 was discovered to contain a free of uninitialized pointer in the xlsxioread_sheetlist_close() function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted XLSX file.",
"id": "GHSA-4462-822p-62r3",
"modified": "2024-04-04T04:55:06Z",
"published": "2023-06-16T18:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-34795"
},
{
"type": "WEB",
"url": "https://github.com/brechtsanders/xlsxio/issues/121"
},
{
"type": "WEB",
"url": "https://github.com/brechtsanders/xlsxio/commit/d653f1604b54532f11b45dca1fa164b4a1f15e2d"
},
{
"type": "WEB",
"url": "https://github.com/xf1les/cve-advisories/blob/main/2023/CVE-2023-34795.md"
}
],
"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-4464-3C7M-P3R9
Vulnerability from github – Published: 2022-02-13 00:00 – Updated: 2022-02-19 00:01Use after free in Swiftshader in Google Chrome prior to 96.0.4664.110 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
{
"affected": [],
"aliases": [
"CVE-2021-4099"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-02-11T23:15:00Z",
"severity": "HIGH"
},
"details": "Use after free in Swiftshader in Google Chrome prior to 96.0.4664.110 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.",
"id": "GHSA-4464-3c7m-p3r9",
"modified": "2022-02-19T00:01:45Z",
"published": "2022-02-13T00:00:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4099"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2021/12/stable-channel-update-for-desktop_13.html"
},
{
"type": "WEB",
"url": "https://crbug.com/1270658"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-44CQ-9WW7-C4GC
Vulnerability from github – Published: 2022-05-13 01:06 – Updated: 2022-05-13 01:06Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.16 and 11.x before 11.0.13, Acrobat and Acrobat Reader DC Classic before 2015.006.30094, and Acrobat and Acrobat Reader DC Continuous before 2015.009.20069 on Windows and OS X allows attackers to execute arbitrary code via a crafted U3D object, a different vulnerability than CVE-2015-5586, CVE-2015-6683, CVE-2015-6684, CVE-2015-6687, CVE-2015-6688, CVE-2015-6689, CVE-2015-6690, CVE-2015-6691, CVE-2015-7615, and CVE-2015-7617.
{
"affected": [],
"aliases": [
"CVE-2015-7621"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2015-10-14T23:59:00Z",
"severity": "MODERATE"
},
"details": "Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.16 and 11.x before 11.0.13, Acrobat and Acrobat Reader DC Classic before 2015.006.30094, and Acrobat and Acrobat Reader DC Continuous before 2015.009.20069 on Windows and OS X allows attackers to execute arbitrary code via a crafted U3D object, a different vulnerability than CVE-2015-5586, CVE-2015-6683, CVE-2015-6684, CVE-2015-6687, CVE-2015-6688, CVE-2015-6689, CVE-2015-6690, CVE-2015-6691, CVE-2015-7615, and CVE-2015-7617.",
"id": "GHSA-44cq-9ww7-c4gc",
"modified": "2022-05-13T01:06:36Z",
"published": "2022-05-13T01:06:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2015-7621"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb15-24.html"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1033796"
},
{
"type": "WEB",
"url": "http://www.zerodayinitiative.com/advisories/ZDI-15-508"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-44FH-C439-XQ8F
Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-30 03:37In the Linux kernel, the following vulnerability has been resolved:
bpf: fix mm lifecycle in open-coded task_vma iterator
The open-coded task_vma iterator reads task->mm locklessly and acquires mmap_read_trylock() but never calls mmget(). If the task exits concurrently, the mm_struct can be freed as it is not SLAB_TYPESAFE_BY_RCU, resulting in a use-after-free.
Safely read task->mm with a trylock on alloc_lock and acquire an mm reference. Drop the reference via bpf_iter_mmput_async() in _destroy() and error paths. bpf_iter_mmput_async() is a local wrapper around mmput_async() with a fallback to mmput() on !CONFIG_MMU.
Reject irqs-disabled contexts (including NMI) up front. Operations used by _next() and _destroy() (mmap_read_unlock, bpf_iter_mmput_async) take spinlocks with IRQs disabled (pool->lock, pi_lock). Running from NMI or from a tracepoint that fires with those locks held could deadlock.
A trylock on alloc_lock is used instead of the blocking task_lock() (get_task_mm) to avoid a deadlock when a softirq BPF program iterates a task that already holds its alloc_lock on the same CPU.
{
"affected": [],
"aliases": [
"CVE-2026-53085"
],
"database_specific": {
"cwe_ids": [
"CWE-416",
"CWE-825"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-24T17:17:22Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix mm lifecycle in open-coded task_vma iterator\n\nThe open-coded task_vma iterator reads task-\u003emm locklessly and acquires\nmmap_read_trylock() but never calls mmget(). If the task exits\nconcurrently, the mm_struct can be freed as it is not\nSLAB_TYPESAFE_BY_RCU, resulting in a use-after-free.\n\nSafely read task-\u003emm with a trylock on alloc_lock and acquire an mm\nreference. Drop the reference via bpf_iter_mmput_async() in _destroy()\nand error paths. bpf_iter_mmput_async() is a local wrapper around\nmmput_async() with a fallback to mmput() on !CONFIG_MMU.\n\nReject irqs-disabled contexts (including NMI) up front. Operations used\nby _next() and _destroy() (mmap_read_unlock, bpf_iter_mmput_async)\ntake spinlocks with IRQs disabled (pool-\u003elock, pi_lock). Running from\nNMI or from a tracepoint that fires with those locks held could\ndeadlock.\n\nA trylock on alloc_lock is used instead of the blocking task_lock()\n(get_task_mm) to avoid a deadlock when a softirq BPF program iterates\na task that already holds its alloc_lock on the same CPU.",
"id": "GHSA-44fh-c439-xq8f",
"modified": "2026-06-30T03:37:13Z",
"published": "2026-06-24T18:32:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53085"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-53085"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492404"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/239cec25a22662dbd80f57d94b38178c8be95269"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/43683bb280330f3d36f0f2a3932a4867b9603e9c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d0862de7c866c5bd7c32531f66738c21197af888"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d8e27d2d22b6e2df3a0125b8c08e9aace38c954c"
},
{
"type": "WEB",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53085.json"
}
],
"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-44FM-8753-G4F8
Vulnerability from github – Published: 2026-06-29 21:32 – Updated: 2026-06-30 00:31A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected process crash.
{
"affected": [],
"aliases": [
"CVE-2026-43734"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-29T20:17:37Z",
"severity": "MODERATE"
},
"details": "A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected process crash.",
"id": "GHSA-44fm-8753-g4f8",
"modified": "2026-06-30T00:31:29Z",
"published": "2026-06-29T21:32:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43734"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/127594"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/127595"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/127685"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-44FV-7JV8-5CPP
Vulnerability from github – Published: 2022-05-14 02:32 – Updated: 2025-10-22 03:30Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014. NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that "VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks."
{
"affected": [],
"aliases": [
"CVE-2014-1776"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2014-04-27T10:55:00Z",
"severity": "HIGH"
},
"details": "Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014. NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that \"VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks.\"",
"id": "GHSA-44fv-7jv8-5cpp",
"modified": "2025-10-22T03:30:37Z",
"published": "2022-05-14T02:32:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2014-1776"
},
{
"type": "WEB",
"url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021"
},
{
"type": "WEB",
"url": "https://technet.microsoft.com/library/security/2963983"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776"
},
{
"type": "WEB",
"url": "https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script"
},
{
"type": "WEB",
"url": "https://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts"
},
{
"type": "WEB",
"url": "http://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspx"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/57908"
},
{
"type": "WEB",
"url": "http://securitytracker.com/id?1030154"
},
{
"type": "WEB",
"url": "http://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.html"
},
{
"type": "WEB",
"url": "http://www.kb.cert.org/vuls/id/222929"
},
{
"type": "WEB",
"url": "http://www.osvdb.org/106311"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/67075"
},
{
"type": "WEB",
"url": "http://www.signalsec.com/cve-2014-1776-ie-0day-analysis"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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.