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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
9832 vulnerabilities reference this CWE, most recent first.
GHSA-5CQC-M9RW-57R9
Vulnerability from github – Published: 2024-05-03 15:30 – Updated: 2024-06-03 18:53In the Linux kernel, the following vulnerability has been resolved:
erofs: fix pcluster use-after-free on UP platforms
During stress testing with CONFIG_SMP disabled, KASAN reports as below:
================================================================== BUG: KASAN: use-after-free in __mutex_lock+0xe5/0xc30 Read of size 8 at addr ffff8881094223f8 by task stress/7789
CPU: 0 PID: 7789 Comm: stress Not tainted 6.0.0-rc1-00002-g0d53d2e882f9 #3 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 Call Trace: .. __mutex_lock+0xe5/0xc30 .. z_erofs_do_read_page+0x8ce/0x1560 .. z_erofs_readahead+0x31c/0x580 .. Freed by task 7787 kasan_save_stack+0x1e/0x40 kasan_set_track+0x20/0x30 kasan_set_free_info+0x20/0x40 __kasan_slab_free+0x10c/0x190 kmem_cache_free+0xed/0x380 rcu_core+0x3d5/0xc90 __do_softirq+0x12d/0x389
Last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x97/0xb0 call_rcu+0x3d/0x3f0 erofs_shrink_workstation+0x11f/0x210 erofs_shrink_scan+0xdc/0x170 shrink_slab.constprop.0+0x296/0x530 drop_slab+0x1c/0x70 drop_caches_sysctl_handler+0x70/0x80 proc_sys_call_handler+0x20a/0x2f0 vfs_write+0x555/0x6c0 ksys_write+0xbe/0x160 do_syscall_64+0x3b/0x90
The root cause is that erofs_workgroup_unfreeze() doesn't reset to orig_val thus it causes a race that the pcluster reuses unexpectedly before freeing.
Since UP platforms are quite rare now, such path becomes unnecessary. Let's drop such specific-designed path directly instead.
{
"affected": [],
"aliases": [
"CVE-2022-48674"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-03T15:15:07Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix pcluster use-after-free on UP platforms\n\nDuring stress testing with CONFIG_SMP disabled, KASAN reports as below:\n\n==================================================================\nBUG: KASAN: use-after-free in __mutex_lock+0xe5/0xc30\nRead of size 8 at addr ffff8881094223f8 by task stress/7789\n\nCPU: 0 PID: 7789 Comm: stress Not tainted 6.0.0-rc1-00002-g0d53d2e882f9 #3\nHardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\nCall Trace:\n \u003cTASK\u003e\n..\n __mutex_lock+0xe5/0xc30\n..\n z_erofs_do_read_page+0x8ce/0x1560\n..\n z_erofs_readahead+0x31c/0x580\n..\nFreed by task 7787\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x20/0x30\n kasan_set_free_info+0x20/0x40\n __kasan_slab_free+0x10c/0x190\n kmem_cache_free+0xed/0x380\n rcu_core+0x3d5/0xc90\n __do_softirq+0x12d/0x389\n\nLast potentially related work creation:\n kasan_save_stack+0x1e/0x40\n __kasan_record_aux_stack+0x97/0xb0\n call_rcu+0x3d/0x3f0\n erofs_shrink_workstation+0x11f/0x210\n erofs_shrink_scan+0xdc/0x170\n shrink_slab.constprop.0+0x296/0x530\n drop_slab+0x1c/0x70\n drop_caches_sysctl_handler+0x70/0x80\n proc_sys_call_handler+0x20a/0x2f0\n vfs_write+0x555/0x6c0\n ksys_write+0xbe/0x160\n do_syscall_64+0x3b/0x90\n\nThe root cause is that erofs_workgroup_unfreeze() doesn\u0027t reset to\norig_val thus it causes a race that the pcluster reuses unexpectedly\nbefore freeing.\n\nSince UP platforms are quite rare now, such path becomes unnecessary.\nLet\u0027s drop such specific-designed path directly instead.",
"id": "GHSA-5cqc-m9rw-57r9",
"modified": "2024-06-03T18:53:45Z",
"published": "2024-05-03T15:30:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48674"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2f44013e39984c127c6efedf70e6b5f4e9dcf315"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8ddd001cef5e82d19192e6861068463ecca5f556"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/94c34faaafe7b55adc2d8d881db195b646959b9e"
}
],
"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-5CRP-H3G2-HWWW
Vulnerability from github – Published: 2026-05-12 18:30 – Updated: 2026-05-12 18:30Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-33840"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-12T18:17:06Z",
"severity": "HIGH"
},
"details": "Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-5crp-h3g2-hwww",
"modified": "2026-05-12T18:30:42Z",
"published": "2026-05-12T18:30:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33840"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33840"
}
],
"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-5CV5-X27Q-H8HQ
Vulnerability from github – Published: 2022-05-14 02:33 – Updated: 2025-10-22 03:30Use-after-free vulnerability in the CDisplayPointer class in mshtml.dll in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted JavaScript code that uses the onpropertychange event handler, as exploited in the wild in September and October 2013, aka "Internet Explorer Memory Corruption Vulnerability."
{
"affected": [],
"aliases": [
"CVE-2013-3897"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2013-10-09T14:54:00Z",
"severity": "HIGH"
},
"details": "Use-after-free vulnerability in the CDisplayPointer class in mshtml.dll in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted JavaScript code that uses the onpropertychange event handler, as exploited in the wild in September and October 2013, aka \"Internet Explorer Memory Corruption Vulnerability.\"",
"id": "GHSA-5cv5-x27q-h8hq",
"modified": "2025-10-22T03:30:35Z",
"published": "2022-05-14T02:33:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2013-3897"
},
{
"type": "WEB",
"url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-080"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18989"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-3897"
},
{
"type": "WEB",
"url": "http://blogs.technet.com/b/srd/archive/2013/10/08/ms13-080-addresses-two-vulnerabilities-under-limited-targeted-attacks.aspx"
},
{
"type": "WEB",
"url": "http://www.us-cert.gov/ncas/alerts/TA13-288A"
}
],
"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-5CVM-3562-3M3M
Vulnerability from github – Published: 2025-06-30 03:30 – Updated: 2026-01-22 18:30Use After Free vulnerability in Samsung Open Source rLottie allows Remote Code Inclusion.This issue affects rLottie: V0.2.
{
"affected": [],
"aliases": [
"CVE-2025-0634"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-30T02:15:20Z",
"severity": "MODERATE"
},
"details": "Use After Free vulnerability in Samsung Open Source rLottie allows Remote Code Inclusion.This issue affects rLottie: V0.2.",
"id": "GHSA-5cvm-3562-3m3m",
"modified": "2026-01-22T18:30:28Z",
"published": "2025-06-30T03:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-0634"
},
{
"type": "WEB",
"url": "https://github.com/Samsung/rlottie/pull/571"
},
{
"type": "WEB",
"url": "https://github.com/Samsung/rlottie/commit/507ea027e47d3e1dc7ddbd9994621215eae7ebb9"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/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"
}
]
}
GHSA-5CW4-RFP6-XJFX
Vulnerability from github – Published: 2026-05-08 15:31 – Updated: 2026-05-21 18:33In the Linux kernel, the following vulnerability has been resolved:
ALSA: pcm: fix use-after-free on linked stream runtime in snd_pcm_drain()
In the drain loop, the local variable 'runtime' is reassigned to a linked stream's runtime (runtime = s->runtime at line 2157). After releasing the stream lock at line 2169, the code accesses runtime->no_period_wakeup, runtime->rate, and runtime->buffer_size (lines 2170-2178) — all referencing the linked stream's runtime without any lock or refcount protecting its lifetime.
A concurrent close() on the linked stream's fd triggers snd_pcm_release_substream() → snd_pcm_drop() → pcm_release_private() → snd_pcm_unlink() → snd_pcm_detach_substream() → kfree(runtime). No synchronization prevents kfree(runtime) from completing while the drain path dereferences the stale pointer.
Fix by caching the needed runtime fields (no_period_wakeup, rate, buffer_size) into local variables while still holding the stream lock, and using the cached values after the lock is released.
{
"affected": [],
"aliases": [
"CVE-2026-43437"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-08T15:16:56Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: fix use-after-free on linked stream runtime in snd_pcm_drain()\n\nIn the drain loop, the local variable \u0027runtime\u0027 is reassigned to a\nlinked stream\u0027s runtime (runtime = s-\u003eruntime at line 2157). After\nreleasing the stream lock at line 2169, the code accesses\nruntime-\u003eno_period_wakeup, runtime-\u003erate, and runtime-\u003ebuffer_size\n(lines 2170-2178) \u2014 all referencing the linked stream\u0027s runtime without\nany lock or refcount protecting its lifetime.\n\nA concurrent close() on the linked stream\u0027s fd triggers\nsnd_pcm_release_substream() \u2192 snd_pcm_drop() \u2192 pcm_release_private()\n\u2192 snd_pcm_unlink() \u2192 snd_pcm_detach_substream() \u2192 kfree(runtime).\nNo synchronization prevents kfree(runtime) from completing while the\ndrain path dereferences the stale pointer.\n\nFix by caching the needed runtime fields (no_period_wakeup, rate,\nbuffer_size) into local variables while still holding the stream lock,\nand using the cached values after the lock is released.",
"id": "GHSA-5cw4-rfp6-xjfx",
"modified": "2026-05-21T18:33:06Z",
"published": "2026-05-08T15:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43437"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4a758e9a1f5ed722f83c4dd35f867fe811553bcb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/629cf09464cf98670996ea5c191dc9743e6f3f00"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9baee36e8c5443411c4629afabafaff8a46a23fd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ae8f8d30d334bad5b1b3cdb1eb8a0b771f55e432"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c2f64e05a0587a83ec42dbd6b7a7ded79b2ff694"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fc71f888994569f87d5bee20b1ac6c9c1e3a7a79"
}
],
"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-5CWC-V53C-RJ65
Vulnerability from github – Published: 2022-05-24 19:20 – Updated: 2022-05-24 19:20Adobe Media Encoder version 15.4 (and earlier) are affected by a memory corruption vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve 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 M4A file.
{
"affected": [],
"aliases": [
"CVE-2021-42721"
],
"database_specific": {
"cwe_ids": [
"CWE-119",
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-11-16T21:15:00Z",
"severity": "HIGH"
},
"details": "Adobe Media Encoder version 15.4 (and earlier) are affected by a memory corruption vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve 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 M4A file.",
"id": "GHSA-5cwc-v53c-rj65",
"modified": "2022-05-24T19:20:46Z",
"published": "2022-05-24T19:20:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-42721"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/bridge/apsb21-94.html"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/media-encoder/apsb21-70.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-5CWW-GPQH-GGQJ
Vulnerability from github – Published: 2023-05-16 21:30 – Updated: 2025-05-05 18:32Use after free in Navigation in Google Chrome prior to 113.0.5672.126 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)
{
"affected": [],
"aliases": [
"CVE-2023-2721"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-05-16T19:15:09Z",
"severity": "HIGH"
},
"details": "Use after free in Navigation in Google Chrome prior to 113.0.5672.126 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)",
"id": "GHSA-5cww-gpqh-ggqj",
"modified": "2025-05-05T18:32:38Z",
"published": "2023-05-16T21:30:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-2721"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2023/05/stable-channel-update-for-desktop_16.html"
},
{
"type": "WEB",
"url": "https://crbug.com/1444360"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/73XUIHJ6UT75VFPDPLJOXJON7MVIKVZI"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FXFL4TDAH72PRCPD5UPZMJMKIMVOPLTI"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202309-17"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202311-11"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2023/dsa-5404"
}
],
"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-5F2M-5GJF-8MQG
Vulnerability from github – Published: 2025-04-01 18:30 – Updated: 2025-04-11 15:32In the Linux kernel, the following vulnerability has been resolved:
HID: hid-steam: Fix use-after-free when detaching device
When a hid-steam device is removed it must clean up the client_hdev used for intercepting hidraw access. This can lead to scheduling deferred work to reattach the input device. Though the cleanup cancels the deferred work, this was done before the client_hdev itself is cleaned up, so it gets rescheduled. This patch fixes the ordering to make sure the deferred work is properly canceled.
{
"affected": [],
"aliases": [
"CVE-2025-21923"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-01T16:15:23Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: hid-steam: Fix use-after-free when detaching device\n\nWhen a hid-steam device is removed it must clean up the client_hdev used for\nintercepting hidraw access. This can lead to scheduling deferred work to\nreattach the input device. Though the cleanup cancels the deferred work, this\nwas done before the client_hdev itself is cleaned up, so it gets rescheduled.\nThis patch fixes the ordering to make sure the deferred work is properly\ncanceled.",
"id": "GHSA-5f2m-5gjf-8mqg",
"modified": "2025-04-11T15:32:27Z",
"published": "2025-04-01T18:30:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21923"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/026714ec7546de741826324a6a1914c91024d06c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a899adf7063c6745aaff1ec869f3c7f6329ed0a1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e53fc232a65f7488ab75d03a5b95f06aaada7262"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ea3f18d2f02629653b7bfe42607737ccd1343e54"
}
],
"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-5F34-XWXQ-MM2X
Vulnerability from github – Published: 2025-02-27 18:31 – Updated: 2025-02-27 18:31In the Linux kernel, the following vulnerability has been resolved:
ep93xx: clock: Fix UAF in ep93xx_clk_register_gate()
arch/arm/mach-ep93xx/clock.c:154:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc] arch/arm/mach-ep93xx/clock.c:151:2: note: Taking true branch if (IS_ERR(clk)) ^ arch/arm/mach-ep93xx/clock.c:152:3: note: Memory is released kfree(psc); ^~~~~~~~~~ arch/arm/mach-ep93xx/clock.c:154:2: note: Use of memory after it is freed return &psc->hw; ^ ~~~~~~~~
{
"affected": [],
"aliases": [
"CVE-2022-49047"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:00:41Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nep93xx: clock: Fix UAF in ep93xx_clk_register_gate()\n\narch/arm/mach-ep93xx/clock.c:154:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]\narch/arm/mach-ep93xx/clock.c:151:2: note: Taking true branch\nif (IS_ERR(clk))\n^\narch/arm/mach-ep93xx/clock.c:152:3: note: Memory is released\nkfree(psc);\n^~~~~~~~~~\narch/arm/mach-ep93xx/clock.c:154:2: note: Use of memory after it is freed\nreturn \u0026psc-\u003ehw;\n^ ~~~~~~~~",
"id": "GHSA-5f34-xwxq-mm2x",
"modified": "2025-02-27T18:31:07Z",
"published": "2025-02-27T18:31:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49047"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0f12166872da46c6b57ba2f1314bbf310b3bf017"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3b68b08885217abd9c57ff9b3bb3eb173eee02a9"
}
],
"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-5F52-V49R-796W
Vulnerability from github – Published: 2023-09-18 18:30 – Updated: 2026-05-12 12:31A flaw was found in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the nssgethostbyname2_r and _nssgetcanonname_r hooks without implementing the _nss*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags.
{
"affected": [],
"aliases": [
"CVE-2023-4806"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-09-18T17:15:55Z",
"severity": "MODERATE"
},
"details": "A flaw was found in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the _nss_*_gethostbyname2_r and _nss_*_getcanonname_r hooks without implementing the _nss_*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags.",
"id": "GHSA-5f52-v49r-796w",
"modified": "2026-05-12T12:31:29Z",
"published": "2023-09-18T18:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4806"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHBA-2024:2413"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:5453"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:5455"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:7409"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2023-4806"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2237782"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-831302.html"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFG4P76UHHZEWQ26FWBXG76N2QLKKPZA"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAQWHTSVOCOZ5K6KPIWKRT3JX4RTZUR"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202310-03"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20240125-0008"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2023/10/03/4"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2023/10/03/5"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2023/10/03/6"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2023/10/03/8"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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.