In the status field in entries in audit logs, numeric codes other than 0 for success can appear. Below is the list of possible codes, their keyword equivalents, and descriptions of the codes. All of this information is taken from the standard Linux errno-base.h and errno.h files.

EPERM             1     /* Operation not permitted */
ENOENT            2     /* No such file or directory */
ESRCH             3     /* No such process */
EINTR             4     /* Interrupted system call */
EIO               5     /* I/O error */
ENXIO             6     /* No such device or address */
E2BIG             7     /* Argument list too long */
ENOEXEC           8     /* Exec format error */
EBADF             9     /* Bad file number */
ECHILD            10    /* No child processes */
EAGAIN            11    /* Try again */
ENOMEM            12    /* Out of memory */
EACCES            13    /* Permission denied */
EFAULT            14    /* Bad address */
ENOTBLK           15    /* Block device required */
EBUSY             16    /* Device or resource busy */
EEXIST            17    /* File exists */
EXDEV             18    /* Cross-device link */
ENODEV            19    /* No such device */
ENOTDIR           20    /* Not a directory */
EISDIR            21    /* Is a directory */
EINVAL            22    /* Invalid argument */
ENFILE            23    /* File table overflow */
EMFILE            24    /* Too many open files */
ENOTTY            25    /* Not a typewriter */
ETXTBSY           26    /* Text file busy */
EFBIG             27    /* File too large */
ENOSPC            28    /* No space left on device */
ESPIPE            29    /* Illegal seek */
EROFS             30    /* Read-only file system */
EMLINK            31    /* Too many links */
EPIPE             32    /* Broken pipe */
EDOM              33    /* Math argument out of domain of func */
ERANGE            34    /* Math result not representable */
EDEADLK           35    /* Resource deadlock would occur */
ENAMETOOLONG      36    /* File name too long */
ENOLCK            37    /* No record locks available */
ENOSYS            38    /* Function not implemented */
ENOTEMPTY         39    /* Directory not empty */
ELOOP             40    /* Too many symbolic links encountered */
EWOULDBLOCK       41    /* Operation would block */
ENOMSG            42    /* No message of desired type */
EIDRM             43    /* Identifier removed */
ECHRNG            44    /* Channel number out of range */
EL2NSYNC          45    /* Level 2 not synchronized */
EL3HLT            46    /* Level 3 halted */
EL3RST            47    /* Level 3 reset */
ELNRNG            48    /* Link number out of range */
EUNATCH           49    /* Protocol driver not attached */
ENOCSI            50    /* No CSI structure available */
EL2HLT            51    /* Level 2 halted */
EBADE             52    /* Invalid exchange */
EBADR             53    /* Invalid request descriptor */
EXFULL            54    /* Exchange full */
ENOANO            55    /* No anode */
EBADRQC           56    /* Invalid request code */
EBADSLT           57    /* Invalid slot */
EDEADLOCK         58    /* File locking deadlock error */
EBFONT            59    /* Bad font file format */
ENOSTR            60    /* Device not a stream */
ENODATA           61    /* No data available */
ETIME             62    /* Timer expired */
ENOSR             63    /* Out of streams resources */
ENONET            64    /* Machine is not on the network */
ENOPKG            65    /* Package not installed */
EREMOTE           66    /* Object is remote */
ENOLINK           67    /* Link has been severed */
EADV              68    /* Advertise error */
ESRMNT            69    /* Srmount error */
ECOMM             70    /* Communication error on send */
EPROTO            71    /* Protocol error */
EMULTIHOP         72    /* Multihop attempted */
EDOTDOT           73    /* RFS specific error */
EBADMSG           74    /* Not a data message */
EOVERFLOW         75    /* Value too large for defined data type */
ENOTUNIQ          76    /* Name not unique on network */
EBADFD            77    /* File descriptor in bad state */
EREMCHG           78    /* Remote address changed */
ELIBACC           79    /* Can not access a needed shared library */
ELIBBAD           80    /* Accessing a corrupted shared library */
ELIBSCN           81    /* .lib section in a.out corrupted */
ELIBMAX           82    /* Attempting to link in too many shared libraries */
ELIBEXEC          83    /* Cannot exec a shared library directly */
EILSEQ            84    /* Illegal byte sequence */
ERESTART          85    /* Interrupted system call should be restarted */
ESTRPIPE          86    /* Streams pipe error */
EUSERS            87    /* Too many users */
ENOTSOCK          88    /* Socket operation on non-socket */
EDESTADDRREQ      89    /* Destination address required */
EMSGSIZE          90    /* Message too long */
EPROTOTYPE        91    /* Protocol wrong type for socket */
ENOPROTOOPT       92    /* Protocol not available */
EPROTONOSUPPORT   93    /* Protocol not supported */
ESOCKTNOSUPPORT   94    /* Socket type not supported */
EOPNOTSUPP        95    /* Operation not supported on transport endpoint */
EPFNOSUPPORT      96    /* Protocol family not supported */
EAFNOSUPPORT      97    /* Address family not supported by protocol */
EADDRINUSE        98    /* Address already in use */
EADDRNOTAVAIL     99    /* Cannot assign requested address */
ENETDOWN          100   /* Network is down */
ENETUNREACH       101   /* Network is unreachable */
ENETRESET         102   /* Network dropped connection because of reset */
ECONNABORTED      103   /* Software caused connection abort */
ECONNRESET        104   /* Connection reset by peer */
ENOBUFS           105   /* No buffer space available */
EISCONN           106   /* Transport endpoint is already connected */
ENOTCONN          107   /* Transport endpoint is not connected */
ESHUTDOWN         108   /* Cannot send after transport endpoint shutdown */
ETOOMANYREFS      109   /* Too many references: cannot splice */
ETIMEDOUT         110   /* Connection timed out */
ECONNREFUSED      111   /* Connection refused */
EHOSTDOWN         112   /* Host is down */
EHOSTUNREACH      113   /* No route to host */
EALREADY          114   /* Operation already in progress */
EINPROGRESS       115   /* Operation now in progress */
ESTALE            116   /* Stale NFS file handle */
EUCLEAN           117   /* Structure needs cleaning */
ENOTNAM           118   /* Not a XENIX named type file */
ENAVAIL           119   /* No XENIX semaphores available */
EISNAM            120   /* Is a named type file */
EREMOTEIO         121   /* Remote I/O error */
EDQUOT            122   /* Quota exceeded */
ENOMEDIUM         123   /* No medium found */
EMEDIUMTYPE       124   /* Wrong medium type */
ECANCELED         125   /* Operation Canceled */
ENOKEY            126   /* Required key not available */
EKEYEXPIRED       127   /* Key has expired */
EKEYREVOKED       128   /* Key has been revoked */
EKEYREJECTED      129   /* Key was rejected by service */