DEBIAN-CVE-2026-115819

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Source
https://security-tracker.debian.org/tracker/CVE-2026-115819
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-115819.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-115819
Upstream
Published
2026-11-11T16:17:24Z
Modified
2026-11-12T05:00:08Z
Severity
  • 4.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
Summary
[none]
Details

Calling the wide scanf family of functions (swscanf, fwscanf, wscanf, vswscanf, vfwscanf and vwscanf) with a %s or %[ conversion without the 'l' length modifier in the GNU C Library version 2.2 to version 2.44 writes an extra null byte one past the end of the destination array when the converted multibyte string and its terminating null byte exactly fill that array. These conversions store each wide input character into the caller's char array as a multibyte sequence. The conversion ends with the sequence that returns to the initial shift state, which also stores the terminating null byte, and the functions then append a second null byte. A destination sized for the converted string and one terminator, as the C standard requires the caller to provide, is therefore written one byte past its end. The out-of-bounds byte is always a null byte, which may corrupt adjacent data or crash the process. An attacker who supplies the input can trigger the overflow with a string whose converted length exactly fills the destination. The narrow scanf functions, the %ls and %l[ conversions into a wchar_t array, and the 'a' and 'm' allocation modifiers are not affected, and storing a wide scanf conversion into a narrow char array is uncommon. This issue affects all architectures and ABIs supported by the GNU C Library.

References

Affected packages

Debian:12 / glibc

Package

Name
glibc
Purl
pkg:deb/debian/glibc?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.36-9
2.36-9+deb12u1
2.36-9+deb12u2
2.36-9+deb12u3
2.36-9+deb12u4
2.36-9+deb12u5
2.36-9+deb12u6
2.36-9+deb12u7
2.36-9+deb12u8
2.36-9+deb12u9
2.36-9+deb12u10
2.36-9+deb12u11
2.36-9+deb12u12
2.36-9+deb12u13
2.36-9+deb12u14
2.36-9+loong64
2.36-10~0
2.37-1
2.37-2
2.37-3
2.37-4
2.37-5
2.37-6
2.37-7
2.37-8
2.37-9
2.37-10
2.37-11
2.37-12
2.37-13
2.37-14
2.37-15~deb13u1
2.37-15
2.37-15.1
2.37-15.1+sh4
2.37-16
2.37-17
2.37-18
2.37-19
2.38-1
2.38-2
2.38-3
2.38-4
2.38-5
2.38-6
2.38-7~0+hurd.1
2.38-7
2.38-8
2.38-9
2.38-10
2.38-11
2.38-12
2.38-12.1
2.38-13
2.38-14
2.38-15~0
2.38-15~1
2.39-1
2.39-2
2.39-3
2.39-3.1
2.39-4
2.39-5
2.39-6
2.39-6+hurd.1
2.39-6+sh4
2.39-7~0
2.39-7
2.39-7+sh4
2.39-8~0
2.40-1
2.40-2
2.40-2+sh4
2.40-3
2.40-3+sh4
2.40-4
2.40-5~hurd.1
2.40-5
2.40-6~1
2.40-6
2.40-7
2.41-1
2.41-2
2.41-3
2.41-4~0
2.41-4
2.41-5~0
2.41-5
2.41-6
2.41-7
2.41-8~0
2.41-8~1
2.41-8
2.41-9~0
2.41-9~1
2.41-9
2.41-10
2.41-11
2.41-12
2.41-13~hurd.0
2.41-13~hurd.1
2.42-1
2.42-2
2.42-3
2.42-4
2.42-5
2.42-6
2.42-7
2.42-8~hurd.1
2.42-8~hurd.2
2.42-8
2.42-9
2.42-10
2.42-11
2.42-12~hurd.1
2.42-12
2.42-13
2.42-14~hurd.1
2.42-14
2.42-15~hurd.1
2.42-15
2.42-16
2.42-17
2.43-1
2.43-2
2.43-3
2.43-3+m68k
2.43-4
2.43-4+m68k
2.43-5
2.43-6
2.43-7~hurd.1
2.43-7
2.44-1
2.44-2
2.44-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-115819.json"

Debian:13 / glibc

Package

Name
glibc
Purl
pkg:deb/debian/glibc?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.41-12
2.41-12+deb13u1
2.41-12+deb13u2
2.41-12+deb13u3
2.41-12+deb13u4
2.41-13~hurd.0
2.41-13~hurd.1
2.42-1
2.42-2
2.42-3
2.42-4
2.42-5
2.42-6
2.42-7
2.42-8~hurd.1
2.42-8~hurd.2
2.42-8
2.42-9
2.42-10
2.42-11
2.42-12~hurd.1
2.42-12
2.42-13
2.42-14~hurd.1
2.42-14
2.42-15~hurd.1
2.42-15
2.42-16
2.42-17
2.43-1
2.43-2
2.43-3
2.43-3+m68k
2.43-4
2.43-4+m68k
2.43-5
2.43-6
2.43-7~hurd.1
2.43-7
2.44-1
2.44-2
2.44-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-115819.json"

Debian:14 / glibc

Package

Name
glibc
Purl
pkg:deb/debian/glibc?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.41-12
2.41-13~hurd.0
2.41-13~hurd.1
2.42-1
2.42-2
2.42-3
2.42-4
2.42-5
2.42-6
2.42-7
2.42-8~hurd.1
2.42-8~hurd.2
2.42-8
2.42-9
2.42-10
2.42-11
2.42-12~hurd.1
2.42-12
2.42-13
2.42-14~hurd.1
2.42-14
2.42-15~hurd.1
2.42-15
2.42-16
2.42-17
2.43-1
2.43-2
2.43-3
2.43-3+m68k
2.43-4
2.43-4+m68k
2.43-5
2.43-6
2.43-7~hurd.1
2.43-7
2.44-1
2.44-2
2.44-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-115819.json"