CWE-190
AllowedInteger Overflow or Wraparound
Abstraction: Base · Status: Stable
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
3893 vulnerabilities reference this CWE, most recent first.
GHSA-6V7W-96VQ-2XM3
Vulnerability from github – Published: 2022-05-16 00:00 – Updated: 2022-05-25 00:00FISCO-BCOS release-3.0.0-rc2 was discovered to contain an issue where a malicious node can trigger an integer overflow and cause a Denial of Service (DoS) via an unusually large viewchange message packet.
{
"affected": [],
"aliases": [
"CVE-2022-28936"
],
"database_specific": {
"cwe_ids": [
"CWE-190"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-05-15T16:15:00Z",
"severity": "HIGH"
},
"details": "FISCO-BCOS release-3.0.0-rc2 was discovered to contain an issue where a malicious node can trigger an integer overflow and cause a Denial of Service (DoS) via an unusually large viewchange message packet.",
"id": "GHSA-6v7w-96vq-2xm3",
"modified": "2022-05-25T00:00:27Z",
"published": "2022-05-16T00:00:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-28936"
},
{
"type": "WEB",
"url": "https://github.com/FISCO-BCOS/FISCO-BCOS/issues/2307"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-6V84-C4C3-P44C
Vulnerability from github – Published: 2024-11-28 00:39 – Updated: 2024-11-30 00:32In ihevcd_allocate_dynamic_bufs of ihevcd_api.c there is a possible resource exhaustion due to integer overflow. This could lead to remote denial of service with no additional execution privileges needed. User interaction is needed for exploitation.
{
"affected": [],
"aliases": [
"CVE-2018-9352"
],
"database_specific": {
"cwe_ids": [
"CWE-190"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-27T23:15:04Z",
"severity": "MODERATE"
},
"details": "In ihevcd_allocate_dynamic_bufs of ihevcd_api.c there is a possible resource exhaustion due to integer overflow. This could lead to remote denial of service with no additional execution privileges needed. User interaction is needed for exploitation.",
"id": "GHSA-6v84-c4c3-p44c",
"modified": "2024-11-30T00:32:14Z",
"published": "2024-11-28T00:39:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-9352"
},
{
"type": "WEB",
"url": "https://source.android.com/docs/security/bulletin/pixel/2018-06-01"
}
],
"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-6V9G-HGM2-F66Q
Vulnerability from github – Published: 2022-05-14 03:07 – Updated: 2022-05-14 03:07An integer overflow vulnerability exists in the function transfer_tokens_after_ICO of GlobeCoin (GLB), an Ethereum token smart contract. An attacker could use it to set any user's balance.
{
"affected": [],
"aliases": [
"CVE-2018-14004"
],
"database_specific": {
"cwe_ids": [
"CWE-190"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-07-12T15:29:00Z",
"severity": "HIGH"
},
"details": "An integer overflow vulnerability exists in the function transfer_tokens_after_ICO of GlobeCoin (GLB), an Ethereum token smart contract. An attacker could use it to set any user\u0027s balance.",
"id": "GHSA-6v9g-hgm2-f66q",
"modified": "2022-05-14T03:07:23Z",
"published": "2022-05-14T03:07:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-14004"
},
{
"type": "WEB",
"url": "https://github.com/VenusADLab/EtherTokens/blob/master/SHARKTECH/SHARKTECH.md"
},
{
"type": "WEB",
"url": "https://github.com/VenusADLab/EtherTokens/tree/master/GlobeCoin(GLB)"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6VHJ-8F7G-V7F7
Vulnerability from github – Published: 2026-03-30 09:31 – Updated: 2026-03-30 09:31An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service (DoS). The issue occurs because chunk size values are parsed using strtol() without properly validating overflow conditions (e.g., errno == ERANGE). A crafted chunk size such as 0x7fffffffffffffff (LONG_MAX) bypasses the existing validation check (chunklen < 0), leading to a signed integer overflow during arithmetic operations (chunklen + 2). This results in incorrect size calculations, causing the proxy to attempt reading an extremely large amount of request-body data and holding worker connections open indefinitely. An attacker can exploit this behavior to exhaust all available worker slots, preventing new connections from being accepted and causing complete service unavailability. Upstream addressed this issue in commit bb7edc4; however, the latest stable release (1.11.3) remains affected at the time of publication.
{
"affected": [],
"aliases": [
"CVE-2026-3945"
],
"database_specific": {
"cwe_ids": [
"CWE-190"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-30T08:16:17Z",
"severity": "HIGH"
},
"details": "An integer overflow vulnerability in the HTTP chunked transfer encoding parser in tinyproxy up to and including version 1.11.3 allows an unauthenticated remote attacker to cause a denial of service (DoS). The issue occurs because chunk size values are parsed using strtol() without properly validating overflow conditions (e.g., errno == ERANGE). A crafted chunk size such as 0x7fffffffffffffff (LONG_MAX) bypasses the existing validation check (chunklen \u003c 0), leading to a signed integer overflow during arithmetic operations (chunklen + 2). This results in incorrect size calculations, causing the proxy to attempt reading an extremely large amount of request-body data and holding worker connections open indefinitely. An attacker can exploit this behavior to exhaust all available worker slots, preventing new connections from being accepted and causing complete service unavailability. Upstream addressed this issue in commit bb7edc4; however, the latest stable release (1.11.3) remains affected at the time of publication.",
"id": "GHSA-6vhj-8f7g-v7f7",
"modified": "2026-03-30T09:31:29Z",
"published": "2026-03-30T09:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3945"
},
{
"type": "WEB",
"url": "https://github.com/tinyproxy/tinyproxy/issues/602"
},
{
"type": "WEB",
"url": "https://github.com/tinyproxy/tinyproxy/pull/603"
},
{
"type": "WEB",
"url": "https://github.com/tinyproxy/tinyproxy/commit/969852c"
},
{
"type": "WEB",
"url": "https://github.com/tinyproxy/tinyproxy/commit/bb7edc4"
},
{
"type": "WEB",
"url": "https://github.com/tinyproxy/tinyproxy/releases"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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-6VRJ-W635-63JG
Vulnerability from github – Published: 2022-05-13 01:02 – Updated: 2025-12-04 00:30An integer overflow in xmlmemory.c in libxml2 before 2.9.5, as used in Google Chrome prior to 62.0.3202.62 and other products, allowed a remote attacker to potentially exploit heap corruption via a crafted XML file.
{
"affected": [],
"aliases": [
"CVE-2017-5130"
],
"database_specific": {
"cwe_ids": [
"CWE-190",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-02-07T23:29:00Z",
"severity": "HIGH"
},
"details": "An integer overflow in xmlmemory.c in libxml2 before 2.9.5, as used in Google Chrome prior to 62.0.3202.62 and other products, allowed a remote attacker to potentially exploit heap corruption via a crafted XML file.",
"id": "GHSA-6vrj-w635-63jg",
"modified": "2025-12-04T00:30:57Z",
"published": "2022-05-13T01:02:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-5130"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2017:2997"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2017/10/stable-channel-update-for-desktop.html"
},
{
"type": "WEB",
"url": "https://crbug.com/722079"
},
{
"type": "WEB",
"url": "https://git.gnome.org/browse/libxml2/commit/?id=897dffbae322b46b83f99a607d527058a72c51ed"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2017/11/msg00034.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/04/msg00004.html"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201710-24"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20190719-0001"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuapr2020.html"
},
{
"type": "WEB",
"url": "http://bugzilla.gnome.org/show_bug.cgi?id=783026"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/101482"
}
],
"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-6VW3-QJC8-X8J8
Vulnerability from github – Published: 2023-03-10 12:30 – Updated: 2023-03-14 18:30The kernel subsystem function check_permission_for_set_tokenid within OpenHarmony-v3.1.5 and prior versions has an UAF vulnerability which local attackers can exploit this vulnerability to escalate the privilege to root.
{
"affected": [],
"aliases": [
"CVE-2023-22436"
],
"database_specific": {
"cwe_ids": [
"CWE-190",
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-03-10T11:15:00Z",
"severity": "HIGH"
},
"details": "The kernel subsystem function check_permission_for_set_tokenid within OpenHarmony-v3.1.5 and prior versions has an UAF vulnerability which local attackers can exploit this vulnerability to escalate the privilege to root.",
"id": "GHSA-6vw3-qjc8-x8j8",
"modified": "2023-03-14T18:30:21Z",
"published": "2023-03-10T12:30:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-22436"
},
{
"type": "WEB",
"url": "https://gitee.com/openharmony/security/blob/master/en/security-disclosure/2023/2023-02.md"
}
],
"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-6W45-GWRJ-V625
Vulnerability from github – Published: 2022-05-13 01:07 – Updated: 2022-05-13 01:07Multiple integer overflows in the XML_GetBuffer function in Expat through 2.1.0, as used in Google Chrome before 44.0.2403.89 and other products, allow remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via crafted XML data, a related issue to CVE-2015-2716.
{
"affected": [],
"aliases": [
"CVE-2015-1283"
],
"database_specific": {
"cwe_ids": [
"CWE-190"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2015-07-23T00:59:00Z",
"severity": "MODERATE"
},
"details": "Multiple integer overflows in the XML_GetBuffer function in Expat through 2.1.0, as used in Google Chrome before 44.0.2403.89 and other products, allow remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via crafted XML data, a related issue to CVE-2015-2716.",
"id": "GHSA-6w45-gwrj-v625",
"modified": "2022-05-13T01:07:39Z",
"published": "2022-05-13T01:07:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2015-1283"
},
{
"type": "WEB",
"url": "https://code.google.com/p/chromium/issues/detail?id=492052"
},
{
"type": "WEB",
"url": "https://codereview.chromium.org/1224303003"
},
{
"type": "WEB",
"url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10365"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201603-09"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201701-21"
},
{
"type": "WEB",
"url": "https://source.android.com/security/bulletin/2016-11-01.html"
},
{
"type": "WEB",
"url": "https://www.tenable.com/security/tns-2016-20"
},
{
"type": "WEB",
"url": "http://googlechromereleases.blogspot.com/2015/07/stable-channel-update_21.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00038.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00064.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00006.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00007.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00010.html"
},
{
"type": "WEB",
"url": "http://rhn.redhat.com/errata/RHSA-2015-1499.html"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2015/dsa-3315"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2015/dsa-3318"
},
{
"type": "WEB",
"url": "http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/75973"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1033031"
},
{
"type": "WEB",
"url": "http://www.ubuntu.com/usn/USN-2726-1"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-6W4M-2XHG-2658
Vulnerability from github – Published: 2023-04-26 17:39 – Updated: 2023-04-26 17:39Impact
The Keccak sponge function interface accepts partial inputs to be absorbed and partial outputs to be squeezed. A buffer can overflow when partial data with some specific sizes are queued, where at least one of them has a length of 2^32 - 200 bytes or more.
Patches
Yes, see commit fdc6fef0.
Workarounds
The problem can be avoided by limiting the size of the partial input data (or partial output digest) below 2^32 - 200 bytes. Multiple calls to the queue system can be chained at a higher level to retain the original functionality. Alternatively, one can process the entire input (or produce the entire output) at once, avoiding the queuing functions altogether.
References
See issue #105 for more details.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "pysha3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "1.0.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "RubyGems",
"name": "sha3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-37454"
],
"database_specific": {
"cwe_ids": [
"CWE-190"
],
"github_reviewed": true,
"github_reviewed_at": "2023-04-26T17:39:58Z",
"nvd_published_at": "2022-10-21T06:15:00Z",
"severity": "CRITICAL"
},
"details": "### Impact\n\nThe Keccak sponge function interface accepts partial inputs to be absorbed and partial outputs to be squeezed. A buffer can overflow when partial data with some specific sizes are queued, where at least one of them has a length of 2^32 - 200 bytes or more.\n\n### Patches\n\nYes, see commit [fdc6fef0](https://github.com/XKCP/XKCP/commit/fdc6fef075f4e81d6b1bc38364248975e08e340a).\n\n### Workarounds\n\nThe problem can be avoided by limiting the size of the partial input data (or partial output digest) below 2^32 - 200 bytes. Multiple calls to the queue system can be chained at a higher level to retain the original functionality. Alternatively, one can process the entire input (or produce the entire output) at once, avoiding the queuing functions altogether.\n\n### References\n\nSee [issue #105](https://github.com/XKCP/XKCP/issues/105) for more details.\n",
"id": "GHSA-6w4m-2xhg-2658",
"modified": "2023-04-26T17:39:58Z",
"published": "2023-04-26T17:39:58Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/XKCP/XKCP/security/advisories/GHSA-6w4m-2xhg-2658"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-37454"
},
{
"type": "WEB",
"url": "https://github.com/XKCP/XKCP/issues/105"
},
{
"type": "WEB",
"url": "https://github.com/johanns/sha3/issues/17"
},
{
"type": "WEB",
"url": "https://github.com/tiran/pysha3/issues/29"
},
{
"type": "WEB",
"url": "https://github.com/XKCP/XKCP/commit/fdc6fef075f4e81d6b1bc38364248975e08e340a"
},
{
"type": "WEB",
"url": "https://github.com/johanns/sha3/commit/5f2e8118a62831911703c8753ff2435c3b5d7312"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2022/dsa-5269"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2022/dsa-5267"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202305-02"
},
{
"type": "WEB",
"url": "https://news.ycombinator.com/item?id=35050307"
},
{
"type": "WEB",
"url": "https://news.ycombinator.com/item?id=33281106"
},
{
"type": "WEB",
"url": "https://mouha.be/sha-3-buffer-overflow"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CMIEXLMTW5GO36HTFFWIPB3OHZXCT3G4"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3ALQ6BDDPX5HU5YBQOBMDVAA2TSGDKIJ"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMIEXLMTW5GO36HTFFWIPB3OHZXCT3G4"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3ALQ6BDDPX5HU5YBQOBMDVAA2TSGDKIJ"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00000.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00041.html"
},
{
"type": "WEB",
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sha3/CVE-2022-37454.yml"
},
{
"type": "WEB",
"url": "https://eprint.iacr.org/2023/331"
},
{
"type": "WEB",
"url": "https://csrc.nist.gov/projects/hash-functions/sha-3-project"
}
],
"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"
}
],
"summary": "Buffer overflow in sponge queue functions"
}
GHSA-6W7H-M57R-3WM5
Vulnerability from github – Published: 2022-05-14 03:03 – Updated: 2022-05-14 03:03The mintToken function of a smart contract implementation for GSI, an Ethereum token, has an integer overflow that allows the owner of the contract to set the balance of an arbitrary user to any value.
{
"affected": [],
"aliases": [
"CVE-2018-13540"
],
"database_specific": {
"cwe_ids": [
"CWE-190"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-07-09T06:29:00Z",
"severity": "HIGH"
},
"details": "The mintToken function of a smart contract implementation for GSI, an Ethereum token, has an integer overflow that allows the owner of the contract to set the balance of an arbitrary user to any value.",
"id": "GHSA-6w7h-m57r-3wm5",
"modified": "2022-05-14T03:03:37Z",
"published": "2022-05-14T03:03:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-13540"
},
{
"type": "WEB",
"url": "https://github.com/BlockChainsSecurity/EtherTokens/blob/master/GEMCHAIN/mint%20integer%20overflow.md"
},
{
"type": "WEB",
"url": "https://github.com/BlockChainsSecurity/EtherTokens/tree/master/GSI"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6W86-WGWQ-RGQ8
Vulnerability from github – Published: 2026-03-04 20:16 – Updated: 2026-03-04 20:16Summary
An unsanitized qpack index can lead to an integer overflow, panicing in debug mode, accessing the wrong or no dynamic table entry in release mode.
What does this mean for Firefox? Firefox runs Neqo in release mode. A malicious remote can cause its own QUIC connection to fail to use qpack, i.e. compression, or enter an inconsistent state. The remote can not crash Firefox, nor affect other QUIC connections.
Details
See fuzz report in https://github.com/mozilla/neqo/issues/3406.
PoC
See test in pull request.
Impact
All Firefox users. Though vulnerability likely scoped to same connection, i.e. low impact.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "neqo-qpack"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.22.2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-190"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-04T20:16:26Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "### Summary\n\nAn unsanitized qpack index can lead to an integer overflow, panicing in debug mode, accessing the wrong or no dynamic table entry in release mode.\n\nWhat does this mean for Firefox? Firefox runs Neqo in release mode. A malicious remote can cause its own QUIC connection to fail to use qpack, i.e. compression, or enter an inconsistent state. The remote can not crash Firefox, nor affect other QUIC connections. \n\n### Details\n\nSee fuzz report in https://github.com/mozilla/neqo/issues/3406.\n\n### PoC\nSee test in pull request.\n\n### Impact\nAll Firefox users. Though vulnerability likely scoped to same connection, i.e. low impact.",
"id": "GHSA-6w86-wgwq-rgq8",
"modified": "2026-03-04T20:16:26Z",
"published": "2026-03-04T20:16:26Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/mozilla/neqo/security/advisories/GHSA-6w86-wgwq-rgq8"
},
{
"type": "WEB",
"url": "https://github.com/mozilla/neqo/issues/3406"
},
{
"type": "PACKAGE",
"url": "https://github.com/mozilla/neqo"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "neqo-qpack has iInteger overflow in qpack dynamic table indexing"
}
Mitigation
Ensure that all protocols are strictly defined, such that all out-of-bounds behavior can be identified simply, and require strict conformance to the protocol.
Mitigation MIT-3
Strategy: Language Selection
- Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- If possible, choose a language or compiler that performs automatic bounds checking.
Mitigation MIT-4
Strategy: Libraries or Frameworks
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
- Use libraries or frameworks that make it easier to handle numbers without unexpected consequences.
- Examples include safe integer handling packages such as SafeInt (C++) or IntegerLib (C or C++). [REF-106]
Mitigation MIT-8
Strategy: Input Validation
- Perform input validation on any numeric input by ensuring that it is within the expected range. Enforce that the input meets both the minimum and maximum requirements for the expected range.
- Use unsigned integers where possible. This makes it easier to perform validation for integer overflows. When signed integers are required, ensure that the range check includes minimum values as well as maximum values.
Mitigation MIT-36
- Understand the programming language's underlying representation and how it interacts with numeric calculation (CWE-681). Pay close attention to byte size discrepancies, precision, signed/unsigned distinctions, truncation, conversion and casting between types, "not-a-number" calculations, and how the language handles numbers that are too large or too small for its underlying representation. [REF-7]
- Also be careful to account for 32-bit, 64-bit, and other potential differences that may affect the numeric representation.
Mitigation MIT-15
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Mitigation MIT-26
Strategy: Compilation or Build Hardening
Examine compiler warnings closely and eliminate problems with potential security implications, such as signed / unsigned mismatch in memory operations, or use of uninitialized variables. Even if the weakness is rarely exploitable, a single failure may lead to the compromise of the entire system.
CAPEC-92: Forced Integer Overflow
This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.