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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
10231 vulnerabilities reference this CWE, most recent first.
GHSA-F42G-QV35-QM2V
Vulnerability from github – Published: 2026-05-01 15:30 – Updated: 2026-07-14 15:31In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_conntrack_helper: pass helper to expect cleanup
nf_conntrack_helper_unregister() calls nf_ct_expect_iterate_destroy() to remove expectations belonging to the helper being unregistered. However, it passes NULL instead of the helper pointer as the data argument, so expect_iter_me() never matches any expectation and all of them survive the cleanup.
After unregister returns, nfnl_cthelper_del() frees the helper object immediately. Subsequent expectation dumps or packet-driven init_conntrack() calls then dereference the freed exp->helper, causing a use-after-free.
Pass the actual helper pointer so expectations referencing it are properly destroyed before the helper object is freed.
BUG: KASAN: slab-use-after-free in string+0x38f/0x430 Read of size 1 at addr ffff888003b14d20 by task poc/103 Call Trace: string+0x38f/0x430 vsnprintf+0x3cc/0x1170 seq_printf+0x17a/0x240 exp_seq_show+0x2e5/0x560 seq_read_iter+0x419/0x1280 proc_reg_read+0x1ac/0x270 vfs_read+0x179/0x930 ksys_read+0xef/0x1c0 Freed by task 103: The buggy address is located 32 bytes inside of freed 192-byte region [ffff888003b14d00, ffff888003b14dc0)
{
"affected": [],
"aliases": [
"CVE-2026-43027"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-01T15:16:47Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_helper: pass helper to expect cleanup\n\nnf_conntrack_helper_unregister() calls nf_ct_expect_iterate_destroy()\nto remove expectations belonging to the helper being unregistered.\nHowever, it passes NULL instead of the helper pointer as the data\nargument, so expect_iter_me() never matches any expectation and all\nof them survive the cleanup.\n\nAfter unregister returns, nfnl_cthelper_del() frees the helper\nobject immediately. Subsequent expectation dumps or packet-driven\ninit_conntrack() calls then dereference the freed exp-\u003ehelper,\ncausing a use-after-free.\n\nPass the actual helper pointer so expectations referencing it are\nproperly destroyed before the helper object is freed.\n\n BUG: KASAN: slab-use-after-free in string+0x38f/0x430\n Read of size 1 at addr ffff888003b14d20 by task poc/103\n Call Trace:\n string+0x38f/0x430\n vsnprintf+0x3cc/0x1170\n seq_printf+0x17a/0x240\n exp_seq_show+0x2e5/0x560\n seq_read_iter+0x419/0x1280\n proc_reg_read+0x1ac/0x270\n vfs_read+0x179/0x930\n ksys_read+0xef/0x1c0\n Freed by task 103:\n The buggy address is located 32 bytes inside of\n freed 192-byte region [ffff888003b14d00, ffff888003b14dc0)",
"id": "GHSA-f42g-qv35-qm2v",
"modified": "2026-07-14T15:31:56Z",
"published": "2026-05-01T15:30:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43027"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2c16e4d64dd91227742dfe196a3e7b0568bef65a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2cf2737c85a2ba2b52024dafe68ffad2676f97be"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/504ba4168466c91210c45acdc332479cfd5f2da6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5cf28d5c8dcbbe8af6d3b145babe491906d7bad1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/620f3d14c1ef51d425060a3056ad8dbae8f998a3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/90bd7e8501349db3006d21fbc09df9ffcb172965"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a242a9ae58aa46ff7dae51ce64150a93957abe65"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dc1739eff48e34cc71d4e2f03715493fbcebd8af"
}
],
"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-F437-Q7VG-JQRW
Vulnerability from github – Published: 2026-08-11 18:31 – Updated: 2026-08-11 18:31Use after free in Windows Schannel allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-62779"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-11T17:18:31Z",
"severity": "HIGH"
},
"details": "Use after free in Windows Schannel allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-f437-q7vg-jqrw",
"modified": "2026-08-11T18:31:21Z",
"published": "2026-08-11T18:31:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-62779"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62779"
}
],
"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-F43Q-G5GG-P826
Vulnerability from github – Published: 2022-02-08 00:00 – Updated: 2022-02-08 00:00Use after free in media in Google Chrome prior to 96.0.4664.45 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
{
"affected": [],
"aliases": [
"CVE-2021-38008"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-12-23T01:15:00Z",
"severity": "HIGH"
},
"details": "Use after free in media in Google Chrome prior to 96.0.4664.45 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.",
"id": "GHSA-f43q-g5gg-p826",
"modified": "2022-02-08T00:00:56Z",
"published": "2022-02-08T00:00:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-38008"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2021/11/stable-channel-update-for-desktop.html"
},
{
"type": "WEB",
"url": "https://crbug.com/1263620"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3W46HRT2UVHWSLZB6JZHQF6JNQWKV744"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2022/dsa-5046"
},
{
"type": "WEB",
"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1398"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-F43W-W9QR-2MWM
Vulnerability from github – Published: 2022-10-14 12:00 – Updated: 2025-05-15 21:31Various refcounting bugs in the multi-BSS handling in the mac80211 stack in the Linux kernel 5.1 through 5.19.14 could be used by local attackers (able to inject WLAN frames) to trigger use-after-free conditions to potentially execute code.
{
"affected": [],
"aliases": [
"CVE-2022-42720"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-10-14T00:15:00Z",
"severity": "HIGH"
},
"details": "Various refcounting bugs in the multi-BSS handling in the mac80211 stack in the Linux kernel 5.1 through 5.19.14 could be used by local attackers (able to inject WLAN frames) to trigger use-after-free conditions to potentially execute code.",
"id": "GHSA-f43w-w9qr-2mwm",
"modified": "2025-05-15T21:31:14Z",
"published": "2022-10-14T12:00:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-42720"
},
{
"type": "WEB",
"url": "https://bugzilla.suse.com/show_bug.cgi?id=1204059"
},
{
"type": "WEB",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless.git/commit/?id=0b7808818cb9df6680f98996b8e9a439fa7bcc2f"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GGHENNMLCWIQV2LLA56BJNFIUZ7WB4IY"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2KTU5LFZNQS7YNGE56MT46VHMXL3DD2"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VNN3VFQPECS6D4PS6ZWD7AFXTOSJDSSR"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GGHENNMLCWIQV2LLA56BJNFIUZ7WB4IY"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S2KTU5LFZNQS7YNGE56MT46VHMXL3DD2"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VNN3VFQPECS6D4PS6ZWD7AFXTOSJDSSR"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20230203-0008"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2022/dsa-5257"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/169951/Kernel-Live-Patch-Security-Notice-LSN-0090-1.html"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2022/10/13/5"
}
],
"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-F44G-QCVC-QMMQ
Vulnerability from github – Published: 2024-05-08 00:31 – Updated: 2024-05-08 00:31Foxit PDF Editor transitionToState Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Editor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the implementation of the transitionToState method. 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 the current process. Was ZDI-CAN-14370.
{
"affected": [],
"aliases": [
"CVE-2021-34968"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-07T23:15:11Z",
"severity": "HIGH"
},
"details": "Foxit PDF Editor transitionToState Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Editor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the implementation of the transitionToState method. 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 the current process. Was ZDI-CAN-14370.",
"id": "GHSA-f44g-qcvc-qmmq",
"modified": "2024-05-08T00:31:14Z",
"published": "2024-05-08T00:31:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-34968"
},
{
"type": "WEB",
"url": "https://www.foxit.com/support/security-bulletins.html"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-1199"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F45G-JMHF-R684
Vulnerability from github – Published: 2026-07-08 09:31 – Updated: 2026-07-08 09:31When the application opens a PDF and JavaScript modifies the properties of form fields, it causes the state of the underlying objects referenced by the program to become invalid. Eventually, it reads an illegal memory address, which leads to the crash of the application.
{
"affected": [],
"aliases": [
"CVE-2026-57237"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-08T09:16:31Z",
"severity": "HIGH"
},
"details": "When the application opens a PDF and JavaScript modifies the properties of form fields, it causes the state of the underlying objects referenced by the program to become invalid. Eventually, it reads an illegal memory address, which leads to the crash of the application.",
"id": "GHSA-f45g-jmhf-r684",
"modified": "2026-07-08T09:31:49Z",
"published": "2026-07-08T09:31:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57237"
},
{
"type": "WEB",
"url": "https://www.foxit.com/support/security-bulletins.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-F466-XR8M-5M4R
Vulnerability from github – Published: 2024-11-22 21:32 – Updated: 2024-11-22 21:32IrfanView DXF File Parsing Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of IrfanView. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of DXF files. 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 the current process. Was ZDI-CAN-24709.
{
"affected": [],
"aliases": [
"CVE-2024-11545"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-22T21:15:13Z",
"severity": "HIGH"
},
"details": "IrfanView DXF File Parsing Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of IrfanView. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of DXF files. 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 the current process. Was ZDI-CAN-24709.",
"id": "GHSA-f466-xr8m-5m4r",
"modified": "2024-11-22T21:32:18Z",
"published": "2024-11-22T21:32:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-11545"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-24-1542"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F46X-3892-WXWQ
Vulnerability from github – Published: 2022-08-29 20:06 – Updated: 2022-09-03 00:00Foxit PDF Reader before 11.1 and PDF Editor before 11.1, and PhantomPDF before 10.1.6, allow attackers to trigger a use-after-free and execute arbitrary code because JavaScript is mishandled.
{
"affected": [],
"aliases": [
"CVE-2021-41781"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-08-29T05:15:00Z",
"severity": "HIGH"
},
"details": "Foxit PDF Reader before 11.1 and PDF Editor before 11.1, and PhantomPDF before 10.1.6, allow attackers to trigger a use-after-free and execute arbitrary code because JavaScript is mishandled.",
"id": "GHSA-f46x-3892-wxwq",
"modified": "2022-09-03T00:00:24Z",
"published": "2022-08-29T20:06:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41781"
},
{
"type": "WEB",
"url": "https://www.foxit.com/support/security-bulletins.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-F47X-R3WJ-9VXC
Vulnerability from github – Published: 2022-05-24 19:14 – Updated: 2022-05-24 19:14Possible use-after-free due to lack of validation for the rule count in filter table in IPA driver in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables
{
"affected": [],
"aliases": [
"CVE-2021-1963"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-09-09T08:15:00Z",
"severity": "MODERATE"
},
"details": "Possible use-after-free due to lack of validation for the rule count in filter table in IPA driver in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice \u0026 Music, Snapdragon Wearables",
"id": "GHSA-f47x-r3wj-9vxc",
"modified": "2022-05-24T19:14:04Z",
"published": "2022-05-24T19:14:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-1963"
},
{
"type": "WEB",
"url": "https://www.qualcomm.com/company/product-security/bulletins/september-2021-bulletin"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-F483-Q24H-3J43
Vulnerability from github – Published: 2023-10-12 00:30 – Updated: 2023-11-25 12:30Use after free in Cast in Google Chrome prior to 118.0.5993.70 allowed a remote attacker who had compromised the renderer process to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Low)
{
"affected": [],
"aliases": [
"CVE-2023-5473"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-10-11T23:15:10Z",
"severity": "MODERATE"
},
"details": "Use after free in Cast in Google Chrome prior to 118.0.5993.70 allowed a remote attacker who had compromised the renderer process to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Low)",
"id": "GHSA-f483-q24h-3j43",
"modified": "2023-11-25T12:30:24Z",
"published": "2023-10-12T00:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-5473"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2023/10/stable-channel-update-for-desktop_10.html"
},
{
"type": "WEB",
"url": "https://crbug.com/1484000"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202311-11"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202312-07"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202401-34"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2023/dsa-5526"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
"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.