diff --git a/cfg/posix.cfg b/cfg/posix.cfg
index 92fb67b16..fac7a8744 100644
--- a/cfg/posix.cfg
+++ b/cfg/posix.cfg
@@ -3491,6 +3491,61 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
       <not-bool/>
     </arg>
   </function>
+  <!-- https://man7.org/linux/man-pages/man3/lsearch.3.html -->
+  <!-- void *lfind(const void *key, const void *base, size_t *nmemb, size_t size, int(*compar)(const void *, const void *)); -->
+  <function name="lfind">
+    <returnValue type="void *"/>
+    <noreturn>false</noreturn>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+      <not-null/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+      <not-null/>
+    </arg>
+    <arg nr="3" direction="in">
+      <not-uninit/>
+      <not-null/>
+      <minsize type="argvalue" arg="4"/>
+    </arg>
+    <arg nr="4" direction="in">
+      <not-uninit/>
+      <not-bool/>
+      <valid>:1</valid>
+    </arg>
+    <arg nr="5" direction="in">
+      <not-uninit/>
+      <not-null/>
+    </arg>
+  </function>
+  <!-- https://man7.org/linux/man-pages/man3/lsearch.3.html -->
+  <!-- void *lsearch(const void *key, void *base, size_t *nmemb, size_t size, int(*compar)(const void *, const void *)); -->
+  <function name="lsearch">
+    <returnValue type="void *"/>
+    <noreturn>false</noreturn>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+      <not-null/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-null/>
+    </arg>
+    <arg nr="3" direction="in">
+      <not-uninit/>
+      <not-null/>
+      <minsize type="argvalue" arg="4"/>
+    </arg>
+    <arg nr="4" direction="in">
+      <not-uninit/>
+      <not-bool/>
+      <valid>:1</valid>
+    </arg>
+    <arg nr="5" direction="in">
+      <not-uninit/>
+      <not-null/>
+    </arg>
+  </function>
   <!-- https://pubs.opengroup.org/onlinepubs/9699919799/functions/regcomp.html -->
   <!-- int regcomp(regex_t *restrict preg, const char *restrict pattern, int cflags); -->
   <function name="regcomp">