CVE-2026-44518

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-44518
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44518.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44518
Aliases
  • GHSA-wf7v-fhxj-73m2
Downstream
Related
Published
2026-05-29T18:07:07Z
Modified
2026-09-10T18:26:53Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
liboqs: XMSS Buffer Overread Bug
Details

liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, an out-of-bounds read has been identified in the XMSS and XMSS^MT stateful signature verification code. When the verification function is called with a signature buffer shorter than the expected signature size for the given parameter set, the implementation does not validate the caller-supplied length and proceeds to read past the end of the buffer. The out-of-bounds bytes are consumed only as input to an internal hash computation and are not returned to the caller, so no oracle exists to leak their contents to an attacker. The primary observable effect is a possible crash (denial of service) of the verifying process if the read crosses into an unmapped memory page. This vulnerability is fixed in 0.16.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125",
        "CWE-20"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44518.json"
}
References

Affected packages

Git / github.com/open-quantum-safe/liboqs

Affected ranges

Type
GIT
Repo
https://github.com/open-quantum-safe/liboqs
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ef70dea7c85e5637f37828d75e5b9bb29dbfe513
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:openquantumsafe:liboqs:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.15.0"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.10.0
0.12.0
0.12.0-rc1
0.14.0
0.15.0
0.15.0-rc1
0.15.0-rc2
0.2.0
0.3.0
0.4.0
0.5.0
0.6.0
0.6.0-rc1
0.6.0-rc2
0.6.0-rc3
0.7.0
0.7.0-rc3
0.7.0-rc4
0.7.1
0.7.1-rc1
0.7.2
0.7.2-rc1
0.7.2-rc2
0.8.0
0.8.0-rc1
0.9.0
0.9.0-rc1
Other
ietf116
master-0.*
master-0.1.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44518.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "566251205338277947681585760693685422",
            "length": 5168
        },
        "id": "CVE-2026-44518-09179cad",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/open-quantum-safe/liboqs/commit/ef70dea7c85e5637f37828d75e5b9bb29dbfe513",
        "target": {
            "file": "tests/test_sig_stfl.c",
            "function": "sig_stfl_test_correctness"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "235080752770317485701889317655849250815",
                "143741461092383164682191006664970173231",
                "182554116872732261265893285911662470013",
                "191498729814548171026498447020539371433",
                "24360437707770469737056713569295199941",
                "12434549499744012410825638099653649464",
                "158182406996090713347076966137739381852",
                "176261712642832739149365220334261611670",
                "60263795667813263029335713197267413289",
                "103071584023724019516318349659111999308",
                "337170073207097503963662452625019664307",
                "79996671262896037847307050172445445921",
                "326972899196035460980690299209410883292",
                "185237935319050287770968683882817420693",
                "339157981175753782014920143821558129294",
                "7646309558479156826252469753602162567",
                "155032176382875810763763519839095984266",
                "281055849771010397669826493082569014394",
                "159130940307342196955521656134041282151",
                "59929876720859251375263305644136646845",
                "89938587715169599657191008460260915236",
                "337779449953467028747361513175386208853",
                "313298288570331153213614305797694390026",
                "323093200035495147376983061893005088546",
                "182947231047010150550963316018122928629",
                "266072211263895538407812267598992387748",
                "85123445060802560913911187434985217599",
                "320829343809279591505026387713406681263",
                "7673463244230914542493714616777694886",
                "178728536710860266857665789192362264050",
                "93005818013140288167728196124491741038",
                "297219649833787948908578714653141291527",
                "295714177625238435778875989409454775638",
                "209402698310771585787219609327052145671",
                "104517244185778297977378597485054888261",
                "31191588969559551851527236353735126603",
                "97543235313892459834660838345498578039",
                "1092053120456926191119695321766332219",
                "109518680900093146230499521018937537699",
                "161210905006852767012882736948691597697",
                "25939915939969484547867200709875093400",
                "330725426177793556280283739440309410799",
                "170531562035892253675175873208803157123",
                "37992871825252454678037911381766177868",
                "289908060236865097670150575057628262751",
                "9149574840448000263606957361064065698",
                "237984338602777983727993952655916630625",
                "293957387499007649975216372527403640826",
                "4628311319581600020495802787504513270",
                "47475435430355360034106138786347336778",
                "218484768988328583825087327967237701221",
                "48405186066861197131242041869418336092",
                "184494964184581364748768468116639458806",
                "197654884494765484684346514566705896982",
                "166213696685546353679322570392401794649",
                "315077450015625634779290512392070648592",
                "21142199892727968888624376186823532204",
                "259156598775562925082028736553455731251",
                "240693184580676412445360447957959374191",
                "294186790019710382215094864891613372867",
                "257445450271227447571019994366312992186",
                "251256376294908152627302397032207792966",
                "62256765526589992699678286990449034585",
                "91021296422855342428691866153744795797",
                "106046368286798763518810348378417095784",
                "130467155133115705083247378923382735775",
                "138471923812291528520343307443640884859",
                "171326672713970385102466088790416617603",
                "208067795854573007346904776704443631352",
                "149424565878405892010165947627890207188",
                "1951372805779320315085130882568386384",
                "1844222053796842503878395065953227723",
                "266005114936810161691439860690362120241",
                "286288206684132068173897236134305330233",
                "109084290557123391861374497092044624271",
                "18390302082657130998974558305221994672",
                "192305914957886919899147328000088855016",
                "333469015974499565438704805713880325001",
                "37093829665342178803455774354611673646",
                "186004654253327772741073405933332762684",
                "122247015637445907263692995329022903774",
                "23137886608080891134750350807352056782",
                "116493685045392232222398883866888893101",
                "198828714276310182361311965140505692049",
                "199847534936672181249272518330611496350",
                "125033348977441939738959611892704842011",
                "226779719236563817143866518552312251931"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-44518-25015db6",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/open-quantum-safe/liboqs/commit/ef70dea7c85e5637f37828d75e5b9bb29dbfe513",
        "target": {
            "file": "tests/test_sig_stfl.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "260633090544819168417923477288378681805",
            "length": 170
        },
        "id": "CVE-2026-44518-36d80dfc",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/open-quantum-safe/liboqs/commit/ef70dea7c85e5637f37828d75e5b9bb29dbfe513",
        "target": {
            "file": "src/sig_stfl/xmss/sig_stfl_xmss_xmssmt.c",
            "function": "_verify"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "330332053578633846516478729808174293768",
            "length": 5164
        },
        "id": "CVE-2026-44518-7eed49c6",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/open-quantum-safe/liboqs/commit/ef70dea7c85e5637f37828d75e5b9bb29dbfe513",
        "target": {
            "file": "tests/test_sig_stfl.c",
            "function": "main"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "152271552861479247343917667357988932418",
                "320326659670111271596423338333990876559",
                "238317383983068816104489159476223052274",
                "291953990545798716176801059562611207286"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-44518-adeba380",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/open-quantum-safe/liboqs/commit/ef70dea7c85e5637f37828d75e5b9bb29dbfe513",
        "target": {
            "file": "src/sig_stfl/xmss/sig_stfl_xmss_xmssmt.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "47659602462878031209475474607091502119",
            "length": 189
        },
        "id": "CVE-2026-44518-c7f958ec",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/open-quantum-safe/liboqs/commit/ef70dea7c85e5637f37828d75e5b9bb29dbfe513",
        "target": {
            "file": "tests/test_sig_stfl.c",
            "function": "test_correctness_wrapper"
        }
    }
]
vanir_signatures_modified 
"2026-08-12T16:24:29Z"