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Both PHP 5.6.40 and 7.1.26 has been released to address security issues. PHP 5.6.40 is the last scheduled release of the PHP 5.6 branch.



PHP 5.6.40
GD:
Fixed bug #77269 (efree() on uninitialized Heap data in imagescale leads to use-after-free).
Fixed bug #77270 (imagecolormatch Out Of Bounds Write on Heap).

Mbstring:
Fixed bug #77370 (Buffer overflow on mb regex functions - fetch_token).
Fixed bug #77371 (heap buffer overflow in mb regex functions - compile_string_node).
Fixed bug #77381 (heap buffer overflow in multibyte match_at).
Fixed bug #77382 (heap buffer overflow due to incorrect length in expand_case_fold_string).
Fixed bug #77385 (buffer overflow in fetch_token).
Fixed bug #77394 (Buffer overflow in multibyte case folding - unicode).
Fixed bug #77418 (Heap overflow in utf32be_mbc_to_code).

Phar:
Fixed bug #77247 (heap buffer overflow in phar_detect_phar_fname_ext).

Xmlrpc:
Fixed bug #77242 (heap out of bounds read in xmlrpc_decode()).
Fixed bug #77380 (Global out of bounds read in xmlrpc base64 code).
PHP 7.1.26
Core:
Fixed bug #77369 (memcpy with negative length via crafted DNS response).

GD:
Fixed bug #77269 (efree() on uninitialized Heap data in imagescale leads to use-after-free).
Fixed bug #77270 (imagecolormatch Out Of Bounds Write on Heap).

IMAP:
Fixed bug #77020 (null pointer dereference in imap_mail).

Mbstring:
Fixed bug #77370 (Buffer overflow on mb regex functions - fetch_token).
Fixed bug #77371 (heap buffer overflow in mb regex functions - compile_string_node).
Fixed bug #77381 (heap buffer overflow in multibyte match_at).
Fixed bug #77382 (heap buffer overflow due to incorrect length in expand_case_fold_string).
Fixed bug #77385 (buffer overflow in fetch_token).
Fixed bug #77394 (Buffer overflow in multibyte case folding - unicode).
Fixed bug #77418 (Heap overflow in utf32be_mbc_to_code).

Phar:
Fixed bug #77247 (heap buffer overflow in phar_detect_phar_fname_ext).

Xmlrpc:
Fixed bug #77242 (heap out of bounds read in xmlrpc_decode()).
Fixed bug #77380 (Global out of bounds read in xmlrpc base64 code).
  PHP 5.6.40 and 7.1.26 released