CVE-2026-5450

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Source
https://cve.org/CVERecord?id=CVE-2026-5450
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-5450.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-5450
Downstream
Related
Published
2026-04-20T20:55:41.170Z
Modified
2026-06-30T16:59:19.396453191Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
scanf %mc off-by-one heap buffer overflow
Details

Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "2.7"
                },
                {
                    "fixed": "*"
                }
            ]
        }
    ],
    "cna_assigner": "glibc",
    "cwe_ids": [
        "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5450.json"
}
References

Affected packages

Git / sourceware.org/git/glibc.git

Affected ranges

Type
GIT
Repo
https://sourceware.org/git/glibc.git
Events
Introduced
ed13ccf1f789aecf1bbdabd4f9f7ff5af085278e
Last affected
f762ccf84f122d1354f103a151cba8bde797d521
Database specific 
{
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "2.7"
        },
        {
            "last_affected": "2.43"
        }
    ],
    "cpe": "cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*"
}

Affected versions

Other
changelog-ends-here
cvs/fedora-glibc-20071212T1051
cvs/fedora-glibc-20071212T1953
cvs/fedora-glibc-20071227T0908
cvs/fedora-glibc-20080103T1958
cvs/fedora-glibc-20080111T0737
cvs/fedora-glibc-20080131T0821
cvs/fedora-glibc-20080201T1017
cvs/fedora-glibc-20080216T1726
cvs/fedora-glibc-20080305T0857
cvs/fedora-glibc-20080310T1651
cvs/fedora-glibc-20080314T1732
cvs/fedora-glibc-20080314T2159
cvs/fedora-glibc-20080326T1041
cvs/fedora-glibc-20080328T1347
cvs/fedora-glibc-20080408T0706
cvs/fedora-glibc-20080410T1907
cvs/fedora-glibc-20080411T1934
cvs/fedora-glibc-20080412T0741
cvs/fedora-glibc-20080515T0735
cvs/fedora-glibc-20080516T2152
cvs/fedora-glibc-20080518T1017
cvs/fedora-glibc-20080520T1924
cvs/fedora-glibc-20080524T2218
cvs/fedora-glibc-20080612T1619
cvs/fedora-glibc-20080613T1601
cvs/fedora-glibc-20080703T1203
cvs/fedora-glibc-20080716T0944
cvs/fedora-glibc-20080728T2320
cvs/fedora-glibc-20080802T0809
cvs/fedora-glibc-20080828T1623
cvs/fedora-glibc-20081019T1815
cvs/fedora-glibc-20081028T1533
cvs/fedora-glibc-20081031T2102
cvs/fedora-glibc-20081112T2008
cvs/fedora-glibc-20081113T2206
cvs/fedora-glibc-20090102T0809
cvs/fedora-glibc-20090102T2040
cvs/fedora-glibc-20090102T2110
cvs/fedora-glibc-20090108T0952
cvs/fedora-glibc-20090108T1017
cvs/fedora-glibc-20090204T2135
cvs/fedora-glibc-20090218T1534
cvs/fedora-glibc-20090309T1421
cvs/fedora-glibc-20090310T1925
cvs/fedora-glibc-20090320T1944
cvs/fedora-glibc-20090401T0935
cvs/fedora-glibc-20090407T0545
cvs/fedora-glibc-20090407T0657
cvs/fedora-glibc-20090408T1602
cvs/fedora-glibc-20090409T1422
cvs/fedora-glibc-20090414T2104
cvs/fedora-glibc-20090415T1619
cvs/fedora-glibc-20090416T0610
cvs/fedora-glibc-20090416T1610
cvs/fedora-glibc-20090424T0747
cvs/fedora-glibc-20090424T1908
cvs/fedora-glibc-20090427T1419
cvs/fedora-glibc-20090509T1828
cvs/fedora-glibc-20090509T2200
cvs/fedora-glibc-20090510T1842
cvs/glibc-2_10
cvs/glibc-2_10-base
cvs/glibc-2_7
cvs/glibc-2_7-base
cvs/glibc-2_8
cvs/glibc-2_8-base
cvs/glibc-2_9
cvs/glibc-2_9-base
glibc-2.*
glibc-2.10
glibc-2.11
glibc-2.12
glibc-2.13
glibc-2.14
glibc-2.14.9000
glibc-2.15
glibc-2.16
glibc-2.16-ports-merge
glibc-2.16-tps
glibc-2.16.0
glibc-2.16.90
glibc-2.17
glibc-2.17.90
glibc-2.18
glibc-2.18.90
glibc-2.19
glibc-2.19.90
glibc-2.20
glibc-2.20.90
glibc-2.21
glibc-2.21.90
glibc-2.22
glibc-2.22.90
glibc-2.23
glibc-2.23.90
glibc-2.24
glibc-2.24.90
glibc-2.25
glibc-2.25.90
glibc-2.26
glibc-2.26.9000
glibc-2.27
glibc-2.27.9000
glibc-2.28
glibc-2.28.9000
glibc-2.29
glibc-2.29.9000
glibc-2.30
glibc-2.30.9000
glibc-2.31
glibc-2.31.9000
glibc-2.32
glibc-2.32.9000
glibc-2.33
glibc-2.33.9000
glibc-2.34
glibc-2.34.9000
glibc-2.35
glibc-2.35.9000
glibc-2.36
glibc-2.36.9000
glibc-2.37
glibc-2.37.9000
glibc-2.38
glibc-2.38.9000
glibc-2.39
glibc-2.39.9000
glibc-2.40
glibc-2.40.9000
glibc-2.41
glibc-2.41.9000
glibc-2.42
glibc-2.42.9000
glibc-2.43
glibc-2.7
glibc-2.8
glibc-2.9

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-5450.json"