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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
10825 vulnerabilities reference this CWE, most recent first.
GHSA-WWF4-95QP-R9VG
Vulnerability from github – Published: 2024-07-16 12:30 – Updated: 2025-09-24 18:30In the Linux kernel, the following vulnerability has been resolved:
iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL
If we fail to copy the just created file descriptor to userland, we try to clean up by putting back 'fd' and freeing 'ib'. The code uses put_unused_fd() for the former which is wrong, as the file descriptor was already published by fd_install() which gets called internally by anon_inode_getfd().
This makes the error handling code leaving a half cleaned up file descriptor table around and a partially destructed 'file' object, allowing userland to play use-after-free tricks on us, by abusing the still usable fd and making the code operate on a dangling 'file->private_data' pointer.
Instead of leaving the kernel in a partially corrupted state, don't attempt to explicitly clean up and leave this to the process exit path that'll release any still valid fds, including the one created by the previous call to anon_inode_getfd(). Simply return -EFAULT to indicate the error.
{
"affected": [],
"aliases": [
"CVE-2022-48801"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-16T12:15:04Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL\n\nIf we fail to copy the just created file descriptor to userland, we\ntry to clean up by putting back \u0027fd\u0027 and freeing \u0027ib\u0027. The code uses\nput_unused_fd() for the former which is wrong, as the file descriptor\nwas already published by fd_install() which gets called internally by\nanon_inode_getfd().\n\nThis makes the error handling code leaving a half cleaned up file\ndescriptor table around and a partially destructed \u0027file\u0027 object,\nallowing userland to play use-after-free tricks on us, by abusing\nthe still usable fd and making the code operate on a dangling\n\u0027file-\u003eprivate_data\u0027 pointer.\n\nInstead of leaving the kernel in a partially corrupted state, don\u0027t\nattempt to explicitly clean up and leave this to the process exit\npath that\u0027ll release any still valid fds, including the one created\nby the previous call to anon_inode_getfd(). Simply return -EFAULT to\nindicate the error.",
"id": "GHSA-wwf4-95qp-r9vg",
"modified": "2025-09-24T18:30:23Z",
"published": "2024-07-16T12:30:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48801"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/202071d2518537866d291aa7cf26af54e674f4d4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b7f54894aa7517d2b6c797a499b9f491e9db9083"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c72ea20503610a4a7ba26c769357d31602769c01"
}
],
"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-WWFH-HMVC-M8R5
Vulnerability from github – Published: 2026-08-11 18:31 – Updated: 2026-08-11 18:31Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-62788"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-11T17:18:32Z",
"severity": "HIGH"
},
"details": "Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-wwfh-hmvc-m8r5",
"modified": "2026-08-11T18:31:23Z",
"published": "2026-08-11T18:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-62788"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62788"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-WWGH-Q742-2242
Vulnerability from github – Published: 2022-05-24 16:46 – Updated: 2024-04-04 00:45Adobe Acrobat and Reader versions 2019.010.20100 and earlier, 2019.010.20099 and earlier, 2017.011.30140 and earlier, 2017.011.30138 and earlier, 2015.006.30495 and earlier, and 2015.006.30493 and earlier have a use after free vulnerability. Successful exploitation could lead to arbitrary code execution.
{
"affected": [],
"aliases": [
"CVE-2019-7831"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-05-22T18:29:00Z",
"severity": "HIGH"
},
"details": "Adobe Acrobat and Reader versions 2019.010.20100 and earlier, 2019.010.20099 and earlier, 2017.011.30140 and earlier, 2017.011.30138 and earlier, 2015.006.30495 and earlier, and 2015.006.30493 and earlier have a use after free vulnerability. Successful exploitation could lead to arbitrary code execution.",
"id": "GHSA-wwgh-q742-2242",
"modified": "2024-04-04T00:45:03Z",
"published": "2022-05-24T16:46:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-7831"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb19-18.html"
},
{
"type": "WEB",
"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0796"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/108320"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-WWJW-6P2F-76RH
Vulnerability from github – Published: 2026-04-10 15:31 – Updated: 2026-05-19 15:31NASM contains a heap use after free vulnerability in response file (-@) processing where a dangling pointer to freed memory is stored in the global depend_file and later dereferenced, as the response-file buffer is freed before the pointer is used, allowing for data corruption or unexpected behavior.
{
"affected": [],
"aliases": [
"CVE-2026-6068"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-10T14:16:38Z",
"severity": "MODERATE"
},
"details": "NASM contains a heap use after free vulnerability in response file (-@) processing where a dangling pointer to freed memory is stored in the global depend_file and later dereferenced, as the response-file buffer is freed before the pointer is used, allowing for data corruption or unexpected behavior.",
"id": "GHSA-wwjw-6p2f-76rh",
"modified": "2026-05-19T15:31:19Z",
"published": "2026-04-10T15:31:57Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6068"
},
{
"type": "WEB",
"url": "https://github.com/netwide-assembler/nasm/issues/222"
},
{
"type": "WEB",
"url": "https://sekai.team/blog/nasm-cve-disclosure/cve-2026-6068"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-WWMP-J24J-C23H
Vulnerability from github – Published: 2022-05-24 19:19 – Updated: 2022-05-24 19:19Use after free in V8 in Google Chrome prior to 95.0.4638.54 allowed a remote attacker who had convinced a user to allow for connection to debugger to potentially exploit heap corruption via a crafted HTML page.
{
"affected": [],
"aliases": [
"CVE-2021-37985"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-11-02T22:15:00Z",
"severity": "HIGH"
},
"details": "Use after free in V8 in Google Chrome prior to 95.0.4638.54 allowed a remote attacker who had convinced a user to allow for connection to debugger to potentially exploit heap corruption via a crafted HTML page.",
"id": "GHSA-wwmp-j24j-c23h",
"modified": "2022-05-24T19:19:42Z",
"published": "2022-05-24T19:19:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-37985"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_19.html"
},
{
"type": "WEB",
"url": "https://crbug.com/1241860"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2022/dsa-5046"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-WWMX-JR76-9VV7
Vulnerability from github – Published: 2026-07-30 03:31 – Updated: 2026-07-31 15:32Use after free in ANGLE in Google Chrome on Windows prior to 151.0.7922.72 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)
{
"affected": [],
"aliases": [
"CVE-2026-17811"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-30T01:16:44Z",
"severity": "HIGH"
},
"details": "Use after free in ANGLE in Google Chrome on Windows prior to 151.0.7922.72 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)",
"id": "GHSA-wwmx-jr76-9vv7",
"modified": "2026-07-31T15:32:48Z",
"published": "2026-07-30T03:31:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17811"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/516954622"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-WWP9-CF2C-QH88
Vulnerability from github – Published: 2026-05-14 21:30 – Updated: 2026-05-15 00:30Use after free in Network in Google Chrome on Windows prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
{
"affected": [],
"aliases": [
"CVE-2026-8530"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-14T20:17:13Z",
"severity": "HIGH"
},
"details": "Use after free in Network in Google Chrome on Windows prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)",
"id": "GHSA-wwp9-cf2c-qh88",
"modified": "2026-05-15T00:30:29Z",
"published": "2026-05-14T21:30:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8530"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/491930142"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-WWR2-FV28-4Q32
Vulnerability from github – Published: 2022-02-19 00:01 – Updated: 2022-02-27 00:00This vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley MicroStation CONNECT 10.16.0.80. 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 JT 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-15373.
{
"affected": [],
"aliases": [
"CVE-2021-46579"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-02-18T20:15:00Z",
"severity": "HIGH"
},
"details": "This vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley MicroStation CONNECT 10.16.0.80. 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 JT 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-15373.",
"id": "GHSA-wwr2-fv28-4q32",
"modified": "2022-02-27T00:00:24Z",
"published": "2022-02-19T00:01:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46579"
},
{
"type": "WEB",
"url": "https://www.bentley.com/en/common-vulnerability-exposure/BE-2021-0005"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-22-166"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-WWVQ-J7G5-3QRF
Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-07-14 15:31In the Linux kernel, the following vulnerability has been resolved:
ext4: fix use-after-free in update_super_work when racing with umount
Commit b98535d09179 ("ext4: fix bug_on in start_this_handle during umount filesystem") moved ext4_unregister_sysfs() before flushing s_sb_upd_work to prevent new error work from being queued via /proc/fs/ext4/xx/mb_groups reads during unmount. However, this introduced a use-after-free because update_super_work calls ext4_notify_error_sysfs() -> sysfs_notify() which accesses the kobject's kernfs_node after it has been freed by kobject_del() in ext4_unregister_sysfs():
update_super_work ext4_put_super ----------------- -------------- ext4_unregister_sysfs(sb) kobject_del(&sbi->s_kobj) __kobject_del() sysfs_remove_dir() kobj->sd = NULL sysfs_put(sd) kernfs_put() // RCU free ext4_notify_error_sysfs(sbi) sysfs_notify(&sbi->s_kobj) kn = kobj->sd // stale pointer kernfs_get(kn) // UAF on freed kernfs_node ext4_journal_destroy() flush_work(&sbi->s_sb_upd_work)
Instead of reordering the teardown sequence, fix this by making ext4_notify_error_sysfs() detect that sysfs has already been torn down by checking s_kobj.state_in_sysfs, and skipping the sysfs_notify() call in that case. A dedicated mutex (s_error_notify_mutex) serializes ext4_notify_error_sysfs() against kobject_del() in ext4_unregister_sysfs() to prevent TOCTOU races where the kobject could be deleted between the state_in_sysfs check and the sysfs_notify() call.
{
"affected": [],
"aliases": [
"CVE-2026-31446"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-22T14:16:38Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix use-after-free in update_super_work when racing with umount\n\nCommit b98535d09179 (\"ext4: fix bug_on in start_this_handle during umount\nfilesystem\") moved ext4_unregister_sysfs() before flushing s_sb_upd_work\nto prevent new error work from being queued via /proc/fs/ext4/xx/mb_groups\nreads during unmount. However, this introduced a use-after-free because\nupdate_super_work calls ext4_notify_error_sysfs() -\u003e sysfs_notify() which\naccesses the kobject\u0027s kernfs_node after it has been freed by kobject_del()\nin ext4_unregister_sysfs():\n\n update_super_work ext4_put_super\n ----------------- --------------\n ext4_unregister_sysfs(sb)\n kobject_del(\u0026sbi-\u003es_kobj)\n __kobject_del()\n sysfs_remove_dir()\n kobj-\u003esd = NULL\n sysfs_put(sd)\n kernfs_put() // RCU free\n ext4_notify_error_sysfs(sbi)\n sysfs_notify(\u0026sbi-\u003es_kobj)\n kn = kobj-\u003esd // stale pointer\n kernfs_get(kn) // UAF on freed kernfs_node\n ext4_journal_destroy()\n flush_work(\u0026sbi-\u003es_sb_upd_work)\n\nInstead of reordering the teardown sequence, fix this by making\next4_notify_error_sysfs() detect that sysfs has already been torn down\nby checking s_kobj.state_in_sysfs, and skipping the sysfs_notify() call\nin that case. A dedicated mutex (s_error_notify_mutex) serializes\next4_notify_error_sysfs() against kobject_del() in ext4_unregister_sysfs()\nto prevent TOCTOU races where the kobject could be deleted between the\nstate_in_sysfs check and the sysfs_notify() call.",
"id": "GHSA-wwvq-j7g5-3qrf",
"modified": "2026-07-14T15:31:51Z",
"published": "2026-04-22T15:31:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31446"
},
{
"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/034053378dd81837fd6c7a43b37ee2e58d4f0b4e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/08b10e6f37fc533a759e9833af0692242e8b3f93"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9449f99ba04f5dd1c8423ad8a90b3651d7240d1d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c4d829737329f2290dd41e290b7d75effdb2a7ff"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c8fe17a1b308c3d8c703ebfb049b325f844342c3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c97e282f7bfd0c3554c63d289964a5ca6a1d2ffe"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d15e4b0a418537aafa56b2cb80d44add83e83697"
}
],
"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-WWXC-Q6V4-R672
Vulnerability from github – Published: 2025-09-18 15:30 – Updated: 2025-12-12 18:30In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early
Not calling hci_(dis)connect_cfm before deleting conn referred to by a socket generally results to use-after-free.
When cleaning up SCO connections when the parent ACL is deleted too early, use hci_conn_failed to do the connection cleanup properly.
We also need to clean up ISO connections in a similar situation when connecting has started but LE Create CIS is not yet sent, so do it too here.
{
"affected": [],
"aliases": [
"CVE-2023-53374"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-18T14:15:40Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early\n\nNot calling hci_(dis)connect_cfm before deleting conn referred to by a\nsocket generally results to use-after-free.\n\nWhen cleaning up SCO connections when the parent ACL is deleted too\nearly, use hci_conn_failed to do the connection cleanup properly.\n\nWe also need to clean up ISO connections in a similar situation when\nconnecting has started but LE Create CIS is not yet sent, so do it too\nhere.",
"id": "GHSA-wwxc-q6v4-r672",
"modified": "2025-12-12T18:30:28Z",
"published": "2025-09-18T15:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53374"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3344d318337d9dca928fd448e966557ec5063f85"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/397d58007532644b35fad746da48c41161f32a57"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e94b898463a62b72a2a8b75dea8936bf4db78e00"
}
],
"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"
}
]
}
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.