CVE-2026-4046

The CVE-2026-4046 issue affects the iconv() function in glibc up to version 2.43, where input conversion from IBM1390/IBM1399 can trigger an assertion failure and cause remote crashes. Affected component: GNU C Library (glibc). Underlying cause: assertion failure during character-set conversion. ...

CVE-2026-5450

CVE-2026-5450 affects the GNU C Library (glibc) where using the scanf family with a %mc format specifier and an explicit width greater than 1024 can trigger a one-byte heap buffer overflow in glibc versions 2.7 through 2.43. Exploitation details are not provided in the sources. Red Hat notes that...

CVE-2026-5928

CVE-2026-5928 affects glibc’s ungetwc on FILE streams with wide characters where overlaps between single-byte and multi-byte encodings occur, in version 2.43 or earlier. A bug in the wide character pushback (_IO_wdefault_pbackfail) causes ungetwc() to operate on the regular input buffer (fp->_...

CVE-2026-4437

CVE-2026-4437 concerns glibc’s DNS response parsing. According to the initial document, calling gethostbyaddr/gethostbyaddr_r with a configured nsswitch.conf DNS backend in GNU C Library versions 2.34–2.43 can yield a crafted DNS response that violates the DNS specification, causing the applicati...

CVE-2026-4438

The CVE-2026-4438 issue affects the GNU C Library (glibc) gethostbyaddr/gethostbyaddr_r when NSSwitch DNS backend is configured; versions 2.34–2.43 may return invalid DNS hostnames. Impact per sources is a DNS-spec violation; no exploitation details are provided in the documents. A patched versio...