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GNU Wget through 1.25.0, fixed in commit c2640fe, contains a heap buffer overflow vulnerability in the convert_fname() function within src/url.c that allows remote attackers to trigger memory corruption through a server-supplied filename requiring character set conversion. When the output buffer is too small during iconv E2BIG reallocation, the reallocation logic miscalculates the remaining space, leading to a heap buffer overflow that can be exploited via a maliciously crafted server response.
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:62142 https://access.redhat.com/errata/RHSA-2026:62142
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:62143 https://access.redhat.com/errata/RHSA-2026:62143
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:62144 https://access.redhat.com/errata/RHSA-2026:62144