CVE-2026-34757

Katalog CVE

CVSS 4.4 · Medium EPSS 0,16%

Kerentanan Use After Free pada libpng, debian linux. Skor CVSS 3.1 4.4 (Medium) menurut NVD.

Deskripsi (NVD)

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.0.9 to before 1.6.57, passing a pointer obtained from png_get_PLTE, png_get_tRNS, or png_get_hIST back into the corresponding setter on the same png_struct/png_info pair causes the setter to read from freed memory and copy its contents into the replacement buffer. The setter frees the internal buffer before copying from the caller-supplied pointer, which now dangles. The freed region may contain stale data (producing silently corrupted chunk metadata) or data from subsequent heap allocations (leaking unrelated heap contents into the chunk struct). This vulnerability is fixed in 1.6.57.

Rincian

Terbit di NVD

9 April 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

4.4 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-416: Use After Free

EPSS (30 hari)

0,16% peluang dieksploitasi; lebih tinggi dari 5,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/pnggroup/libpng/security/advisories/GHSA-6fr7-g8h7-v645 mitigasi · patch · advisory vendor
• https://github.com/pnggroup/libpng/commit/398cbe3df03f4e11bb031e07f416dfdde3684e8a patch
• https://github.com/pnggroup/libpng/commit/55d20aaa322c9274491cda82c5cd4f99b48c6bcc patch
• https://github.com/pnggroup/libpng/issues/836 exploit · issue tracking · mitigasi
• https://github.com/pnggroup/libpng/issues/837 exploit · issue tracking · mitigasi
• https://lists.debian.org/debian-lts-announce/2026/05/msg00017.html mailing list · advisory pihak ketiga