The string component in the GNU C Library (aka glibc or libc6) through 2.28, when running on the x32 architecture, incorrectly attempts to use a 64-bit register for size_t in assembly codes, which can lead to a segmentation fault or possibl…

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No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

The string component in the GNU C Library (aka glibc or libc6) through 2.28, when running on the x32 architecture, incorrectly attempts to use a 64-bit register for size_t in assembly codes, which can lead to a segmentation fault or possibly unspecified other impact, as demonstrated by a crash in __memmove_avx_unaligned_erms in sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S during a memcpy.

Source published

18 Jan 2019 19:00:00 UTC

Source modified

14 Oct 2026 06:49:33 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

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