CWE-125
AllowedOut-of-bounds Read
Abstraction: Base · Status: Draft
The product reads data past the end, or before the beginning, of the intended buffer.
11347 vulnerabilities reference this CWE, most recent first.
GHSA-VW7W-MRF6-7VRV
Vulnerability from github – Published: 2025-07-07 18:32 – Updated: 2025-07-08 18:31LuaJIT through 2.1 has an out-of-bounds read in the stack-overflow handler in lj_state.c
{
"affected": [],
"aliases": [
"CVE-2024-25178"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-07T17:15:27Z",
"severity": "CRITICAL"
},
"details": "LuaJIT through 2.1 has an out-of-bounds read in the stack-overflow handler in lj_state.c",
"id": "GHSA-vw7w-mrf6-7vrv",
"modified": "2025-07-08T18:31:22Z",
"published": "2025-07-07T18:32:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-25178"
},
{
"type": "WEB",
"url": "https://github.com/LuaJIT/LuaJIT/issues/1152"
},
{
"type": "WEB",
"url": "https://github.com/LuaJIT/LuaJIT/commit/defe61a56751a0db5f00ff3ab7b8f45436ba74c8"
},
{
"type": "WEB",
"url": "https://gist.github.com/pwnhacker0x18/423b4292f301ab274b42d5ed6e0b87d8"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-VW84-58XJ-2QH6
Vulnerability from github – Published: 2022-05-14 00:52 – Updated: 2022-05-14 00:52Adobe Acrobat and Reader versions 2018.011.20063 and earlier, 2017.011.30102 and earlier, and 2015.006.30452 and earlier have an out-of-bounds read vulnerability. Successful exploitation could lead to information disclosure.
{
"affected": [],
"aliases": [
"CVE-2018-12843"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-10-12T18:29:00Z",
"severity": "MODERATE"
},
"details": "Adobe Acrobat and Reader versions 2018.011.20063 and earlier, 2017.011.30102 and earlier, and 2015.006.30452 and earlier have an out-of-bounds read vulnerability. Successful exploitation could lead to information disclosure.",
"id": "GHSA-vw84-58xj-2qh6",
"modified": "2022-05-14T00:52:37Z",
"published": "2022-05-14T00:52:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-12843"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb18-30.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/105439"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1041809"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-VW88-WC28-C2H6
Vulnerability from github – Published: 2025-01-28 00:32 – Updated: 2026-04-02 21:32A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Ventura 13.7.3, macOS Sonoma 14.7.3. An app may be able to access removable volumes without user consent.
{
"affected": [],
"aliases": [
"CVE-2025-24093"
],
"database_specific": {
"cwe_ids": [
"CWE-125",
"CWE-276"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-27T22:15:15Z",
"severity": "CRITICAL"
},
"details": "A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Ventura 13.7.3, macOS Sonoma 14.7.3. An app may be able to access removable volumes without user consent.",
"id": "GHSA-vw88-wc28-c2h6",
"modified": "2026-04-02T21:32:06Z",
"published": "2025-01-28T00:32:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-24093"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122069"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122070"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/122373"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2025/Apr/8"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2025/Jan/16"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2025/Jan/17"
}
],
"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"
}
]
}
GHSA-VW8C-7VR6-CQVP
Vulnerability from github – Published: 2022-05-13 01:23 – Updated: 2022-05-13 01:23The IsCSSWordSpacingSpace function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via unspecified vectors.
{
"affected": [],
"aliases": [
"CVE-2012-3995"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2012-10-10T17:55:00Z",
"severity": "HIGH"
},
"details": "The IsCSSWordSpacingSpace function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via unspecified vectors.",
"id": "GHSA-vw8c-7vr6-cqvp",
"modified": "2022-05-13T01:23:43Z",
"published": "2022-05-13T01:23:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2012-3995"
},
{
"type": "WEB",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=765621"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/79156"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16808"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.html"
},
{
"type": "WEB",
"url": "http://rhn.redhat.com/errata/RHSA-2012-1351.html"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/50856"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/50892"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/50904"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/50935"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/50936"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/50984"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/55318"
},
{
"type": "WEB",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2012:163"
},
{
"type": "WEB",
"url": "http://www.mozilla.org/security/announce/2012/mfsa2012-85.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/56136"
},
{
"type": "WEB",
"url": "http://www.ubuntu.com/usn/USN-1611-1"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-VW8W-F3P8-WPPG
Vulnerability from github – Published: 2022-05-24 19:13 – Updated: 2022-05-24 19:13An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 14.5 and iPadOS 14.5, macOS Big Sur 11.3. A malicious application may be able to execute arbitrary code with kernel privileges.
{
"affected": [],
"aliases": [
"CVE-2021-1867"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-09-08T15:15:00Z",
"severity": "HIGH"
},
"details": "An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 14.5 and iPadOS 14.5, macOS Big Sur 11.3. A malicious application may be able to execute arbitrary code with kernel privileges.",
"id": "GHSA-vw8w-f3p8-wppg",
"modified": "2022-05-24T19:13:32Z",
"published": "2022-05-24T19:13:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-1867"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT212317"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT212325"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-VWC7-RHXW-HPPQ
Vulnerability from github – Published: 2022-05-24 17:44 – Updated: 2025-01-14 21:31Out-of-bounds Read vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to execute arbitrary code via crafted web requests.
{
"affected": [],
"aliases": [
"CVE-2021-27647"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-03-12T07:15:00Z",
"severity": "CRITICAL"
},
"details": "Out-of-bounds Read vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to execute arbitrary code via crafted web requests.",
"id": "GHSA-vwc7-rhxw-hppq",
"modified": "2025-01-14T21:31:41Z",
"published": "2022-05-24T17:44:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-27647"
},
{
"type": "WEB",
"url": "https://www.synology.com/security/advisory/Synology_SA_20_26"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-339"
}
],
"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"
}
]
}
GHSA-VWCJ-FFX4-G5RX
Vulnerability from github – Published: 2022-05-24 19:09 – Updated: 2022-05-24 19:09A buffer overflow vulnerability in the __Parse_indx component of VideoLAN VLC Media Player 3.0.11 allows attackers to cause an out-of-bounds read via a crafted .avi file.
{
"affected": [],
"aliases": [
"CVE-2021-25801"
],
"database_specific": {
"cwe_ids": [
"CWE-120",
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-07-26T17:15:00Z",
"severity": "HIGH"
},
"details": "A buffer overflow vulnerability in the __Parse_indx component of VideoLAN VLC Media Player 3.0.11 allows attackers to cause an out-of-bounds read via a crafted .avi file.",
"id": "GHSA-vwcj-ffx4-g5rx",
"modified": "2022-05-24T19:09:12Z",
"published": "2022-05-24T19:09:12Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-25801"
},
{
"type": "WEB",
"url": "https://code.videolan.org/videolan/vlc-3.0/-/commit/f5f8cc3ab8825f178de3f6714bfbff8b3f293fd2"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-VWF8-RQ93-5M8V
Vulnerability from github – Published: 2025-09-05 18:31 – Updated: 2026-05-12 15:31In the Linux kernel, the following vulnerability has been resolved:
hfs: fix slab-out-of-bounds in hfs_bnode_read()
This patch introduces is_bnode_offset_valid() method that checks the requested offset value. Also, it introduces check_and_correct_requested_length() method that checks and correct the requested length (if it is necessary). These methods are used in hfs_bnode_read(), hfs_bnode_write(), hfs_bnode_clear(), hfs_bnode_copy(), and hfs_bnode_move() with the goal to prevent the access out of allocated memory and triggering the crash.
{
"affected": [],
"aliases": [
"CVE-2025-38715"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-04T16:15:40Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfs: fix slab-out-of-bounds in hfs_bnode_read()\n\nThis patch introduces is_bnode_offset_valid() method that checks\nthe requested offset value. Also, it introduces\ncheck_and_correct_requested_length() method that checks and\ncorrect the requested length (if it is necessary). These methods\nare used in hfs_bnode_read(), hfs_bnode_write(), hfs_bnode_clear(),\nhfs_bnode_copy(), and hfs_bnode_move() with the goal to prevent\nthe access out of allocated memory and triggering the crash.",
"id": "GHSA-vwf8-rq93-5m8v",
"modified": "2026-05-12T15:31:01Z",
"published": "2025-09-05T18:31:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38715"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/384a66b89f9540a9a8cb0f48807697dfabaece4c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/67ecc81f6492275c9c54280532f558483c99c90e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a1a60e79502279f996e55052f50cc14919020475"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a431930c9bac518bf99d6b1da526a7f37ddee8d8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e7d2dc2421e821e4045775e6dc226378328de6f6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/eec522fd0d28106b14a59ab2d658605febe4a3bb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/efc095b35b23297e419c2ab4fc1ed1a8f0781a29"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fc7f732984ec91f30be3e574e0644066d07f2b78"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fe2891a9c43ab87d1a210d61e6438ca6936e2f62"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-VWFV-P644-HMP6
Vulnerability from github – Published: 2022-01-14 00:01 – Updated: 2022-01-15 00:02This vulnerability allows remote attackers to disclose sensitive information on affected installations of Bentley View 10.15.0.75. 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 proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-14843.
{
"affected": [],
"aliases": [
"CVE-2021-34890"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-01-13T22:15:00Z",
"severity": "MODERATE"
},
"details": "This vulnerability allows remote attackers to disclose sensitive information on affected installations of Bentley View 10.15.0.75. 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 proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-14843.",
"id": "GHSA-vwfv-p644-hmp6",
"modified": "2022-01-15T00:02:31Z",
"published": "2022-01-14T00:01:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-34890"
},
{
"type": "WEB",
"url": "https://www.bentley.com/en/common-vulnerability-exposure/BE-2021-0005"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-1479"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-VWGJ-V875-V924
Vulnerability from github – Published: 2025-10-04 18:31 – Updated: 2026-01-22 21:33In the Linux kernel, the following vulnerability has been resolved:
binfmt_misc: fix shift-out-of-bounds in check_special_flags
UBSAN reported a shift-out-of-bounds warning:
left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8d/0xcf lib/dump_stack.c:106 ubsan_epilogue+0xa/0x44 lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds+0x1e7/0x208 lib/ubsan.c:322 check_special_flags fs/binfmt_misc.c:241 [inline] create_entry fs/binfmt_misc.c:456 [inline] bm_register_write+0x9d3/0xa20 fs/binfmt_misc.c:654 vfs_write+0x11e/0x580 fs/read_write.c:582 ksys_write+0xcf/0x120 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x34/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4194e1
Since the type of Node's flags is unsigned long, we should define these macros with same type too.
{
"affected": [],
"aliases": [
"CVE-2022-50497"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-04T16:15:46Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinfmt_misc: fix shift-out-of-bounds in check_special_flags\n\nUBSAN reported a shift-out-of-bounds warning:\n\n left shift of 1 by 31 places cannot be represented in type \u0027int\u0027\n Call Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x8d/0xcf lib/dump_stack.c:106\n ubsan_epilogue+0xa/0x44 lib/ubsan.c:151\n __ubsan_handle_shift_out_of_bounds+0x1e7/0x208 lib/ubsan.c:322\n check_special_flags fs/binfmt_misc.c:241 [inline]\n create_entry fs/binfmt_misc.c:456 [inline]\n bm_register_write+0x9d3/0xa20 fs/binfmt_misc.c:654\n vfs_write+0x11e/0x580 fs/read_write.c:582\n ksys_write+0xcf/0x120 fs/read_write.c:637\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x34/0x80 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n RIP: 0033:0x4194e1\n\nSince the type of Node\u0027s flags is unsigned long, we should define these\nmacros with same type too.",
"id": "GHSA-vwgj-v875-v924",
"modified": "2026-01-22T21:33:43Z",
"published": "2025-10-04T18:31:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50497"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0f1a48994b3e516d5c7fd5d12204fdba7a604771"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/419b808504c26b3e3342365f34ccd0843e09a7f8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6a46bf558803dd2b959ca7435a5c143efe837217"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/88cea1676a09f7c45a1438153a126610c33b1590"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/97382a2639b1cd9631f6069061e9d7062cd2b098"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a651bb5ff997b9f02662bcdef3d8b4e6f0d79656"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a91123d4bda463469f68f0427adabf8108001f94"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dcbc51d31d0afbd45e830e3cf565a7b3ca7bf0d8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ea6145370be8016755c43aca799815fc4b8c88b1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-5
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
- To reduce the likelihood of introducing an out-of-bounds read, ensure that you validate and ensure correct calculations for any length argument, buffer size calculation, or offset. Be especially careful of relying on a sentinel (i.e. special character such as NUL) in untrusted inputs.
Mitigation
Strategy: Language Selection
Use a language that provides appropriate memory abstractions.
CAPEC-540: Overread Buffers
An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.