[PATCH] libpng: Update to version 1.6.58

[Adolf Belka <adolf.belka@ipfire.org>]

- Update from version 1.6.56 to 1.6.58
- Update of rootfile
- CVE fix applied in 1.6.57
- Changelog
    1.6.58
  Fixed a regression introduced in version 1.6.56 that caused `png_get_PLTE`
    to return stale palette data after applying gamma and background transforms
    in-place.
    (Reported by ralfjunker <ralfjunker@users.noreply.github.com>.)
    1.6.57
  Fixed CVE-2026-34757 (medium severity):
    Use-after-free in `png_set_PLTE`, `png_set_tRNS` and `png_set_hIST`
    leading to corrupted chunk data and potential heap information disclosure.
    Also hardened the append-style setters (`png_set_text`, `png_set_sPLT`,
    `png_set_unknown_chunks`) against a theoretical variant of the same
    aliasing pattern.
    (Reported by Iv4n <Iv4n550@users.noreply.github.com>.)
  Fixed integer overflow in rowbytes computation in read transforms.
    (Contributed by Mohammad Seet.)

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
---
 config/rootfiles/common/libpng | 2 +-
 lfs/libpng                     | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/config/rootfiles/common/libpng b/config/rootfiles/common/libpng
index c19c261c5..ef7d888f3 100644
--- a/config/rootfiles/common/libpng
+++ b/config/rootfiles/common/libpng
@@ -16,7 +16,7 @@ usr/lib/libpng.so
 #usr/lib/libpng16.la
 usr/lib/libpng16.so
 usr/lib/libpng16.so.16
-usr/lib/libpng16.so.16.56.0
+usr/lib/libpng16.so.16.58.0
 #usr/lib/pkgconfig/libpng.pc
 #usr/lib/pkgconfig/libpng16.pc
 #usr/share/man/man3/libpng.3
diff --git a/lfs/libpng b/lfs/libpng
index d65a5d86e..6aa7fbee9 100644
--- a/lfs/libpng
+++ b/lfs/libpng
@@ -24,7 +24,7 @@
 
 include Config
 
-VER        = 1.6.56
+VER        = 1.6.58
 
 THISAPP    = libpng-$(VER)
 DL_FILE    = $(THISAPP).tar.xz
@@ -40,7 +40,7 @@ objects = $(DL_FILE)
 
 $(DL_FILE) = $(DL_FROM)/$(DL_FILE)
 
-$(DL_FILE)_BLAKE2 = f653a3177e0910fc156a792d5522fc2a0c04ce0bb43eabb68e06922303dcf6062d8f9b570440bfe1a94ac1b901ef6e9c32b6882d0f4a406e5a9090ea3396f89a
+$(DL_FILE)_BLAKE2 = 51042e8f2b56d469b516db9cbde6d4b6813a62d1b7117898ba32a9a5ac5cd73832c627d7377745e5d5154aade6ec6928fc6b9cd9b96885f64b7ca7df19ca40ec
 
 install : $(TARGET)
 
-- 
2.54.0