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CVE-2021-3973: patch 8.2.3611: crash when using CTRL-W f without finding a file name · vim/vim@615ddd5

vim is vulnerable to Heap-based Buffer Overflow

CVE
#buffer_overflow

@@ -1735,6 +1735,9 @@ find_file_in_path_option(

proc->pr_WindowPtr = (APTR)-1L;

# endif

if (len == 0)

return NULL;

if (first == TRUE)

{

// copy file name into NameBuff, expanding environment variables

@@ -2118,7 +2121,12 @@ find_file_name_in_path(

int c;

# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)

char_u *tofree = NULL;

# endif

if (len == 0)

return NULL;

# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)

if ((options & FNAME_INCL) && *curbuf->b_p_inex != NUL)

{

tofree = eval_includeexpr(ptr, len);

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