QuickLinks -- Click here to rapidly navigate through this document

Exhibit 10.1.2

THIRD AMENDMENT TO
AMENDED AND RESTATED SENIOR SECURED REVOLVING CREDIT AGREEMENT

        This THIRD AMENDMENT TO AMENDED AND RESTATED SENIOR SECURED REVOLVING
CREDIT AGREEMENT (this "Amendment") is dated as of May 1, 2018, to be effective
as of the Amendment Effective Date (defined below) and is entered into by and
between HALCÓN RESOURCES CORPORATION, as "Borrower", each of the undersigned
Guarantors (together with the Borrower, the "Obligors"), each of the undersigned
Lenders party to the Credit Agreement, and JPMORGAN CHASE BANK, N.A., as
Administrative Agent.

RECITALS

        Reference is made to the Amended and Restated Senior Secured Revolving
Credit Agreement dated as of September 7, 2017, among the Borrower, a
corporation duly formed and existing under the laws of the State of Delaware,
each of the Lenders and other parties from time to time party thereto and
JPMorgan Chase Bank, N.A., as Administrative Agent for the Lenders, as amended
by the First Amendment dated as of November 1, 2017 and the Second Amendment
dated as of February 2, 2018 (such agreement, as the same may be further
amended, supplemented, restated or otherwise modified from time to time, the
"Credit Agreement"). Unless otherwise stated in this Amendment, any reference to
a "Section" shall be deemed a reference to the applicable Section of the Credit
Agreement and capitalized terms used but not defined herein shall have the
meanings given to such terms in the Credit Agreement.

        WHEREAS, the Borrower has requested and the Administrative Agent and the
Lenders party hereto have agreed to enter into this Amendment, and modify
certain provisions of the Credit Agreement, all as set forth herein.

        NOW, THEREFORE, to induce the Administrative Agent and the Required
Lenders to enter into this Amendment and in consideration of the premises and
the mutual covenants herein contained, for good and valuable consideration the
receipt and sufficiency of which are hereby acknowledged, the parties hereto
agree as follows:

ARTICLE I
AMENDMENTS TO CREDIT AGREEMENT

        Section 1.01    Amendment to Section 1.02.    The following defined term
is hereby amended as follows:

        "Agreement" means this Senior Secured Revolving Credit Agreement,
including the Schedules and Exhibits hereto, as amended by that certain First
Amendment dated as of November 1, 2017, that certain Second Amendment dated as
of February 2, 2018 and that certain Third Amendment dated as of May 1, 2018, as
the same may be further amended, supplemented or modified from time to time.

ARTICLE II
REALLOCATION

        The Lenders have agreed among themselves, in consultation with the
Borrower, to reallocate their respective Maximum Credit Amounts. The
Administrative Agent and the Borrower hereby consent to such reallocation and
assignments of the Maximum Credit Amounts and the assignment by Bank of America,
N.A. (the "Exiting Lender") of all of their Maximum Credit Amount. On the
Amendment Effective Date and after giving effect to such reallocations and
assignments, the Maximum Credit Amount of each Lender shall be as set forth on
Annex I of this Amendment which Annex I supersedes

1

--------------------------------------------------------------------------------

and replaces the Annex I to the Credit Agreement. With respect to such
reallocation and assignments, each Lender shall be deemed to have acquired the
Maximum Credit Amount allocated to it, if any, from each of the other Lenders
and pursuant to the terms of the Assignment and Assumption Agreement attached as
Exhibit F to the Credit Agreement as if each such Lender had executed an
Assignment and Assumption Agreement with respect to such allocation. In
connection with the assignments in this Amendment and for purposes of such
assignments only, the Lenders, the Administrative Agent and the Borrower waive
the processing and recordation fee under Section 12.04(b)(ii)(C).

ARTICLE III
CONDITIONS PRECEDENT

        This Amendment shall become effective on the date (the "Amendment
Effective Date") when each of the following conditions are satisfied (or waived
in accordance with Section 12.02):

        Section 3.01    Amendment.    The Administrative Agent shall have
received a counterpart of this Amendment signed by the Borrower and the Required
Lenders.

        Section 3.02    Fees.    The Administrative Agent and the Lenders shall
have received all fees and other amounts due and payable on or prior to the
Amendment Effective Date, including, to the extent invoiced, reimbursement or
payment in full of all out of pocket expenses required to be reimbursed or paid
by the Borrower under the Credit Agreement.

        Section 3.03    No Default; No Material Adverse Effect.    At the time
of and immediately after giving effect to this Amendment, (a) no Default or
Event of Default shall have occurred and be continuing and (b) no event or
events shall have occurred which individually or in the aggregate could
reasonably be expected to have a Material Adverse Effect.

        Section 3.04    Exiting Lender.    The Exiting Lender shall have
received the agreed consideration for the assignment of all of its Loans, rights
and obligations, including its Commitment, under the Credit Agreement.

        The Administrative Agent is hereby authorized and directed to declare
this Amendment to be effective when it has received documents confirming or
certifying, to the satisfaction of the Administrative Agent, compliance with the
conditions set forth in this Article III or the waiver of such conditions as
permitted in Section 12.02. Such declaration shall be final, conclusive and
binding upon all parties to the Credit Agreement for all purposes.

ARTICLE IV
MISCELLANEOUS

        Section 4.01    Confirmation.    The provisions of the Credit Agreement
shall remain in full force and effect following the effectiveness of this
Amendment.

        Section 4.02    Ratification and Affirmation; Representations and
Warranties.    Each Obligor hereby (a) acknowledges the terms of this Amendment;
(b) ratifies and affirms its obligations under, and acknowledges, renews and
extends its continued liability under, each Loan Document to which it is a party
and agrees that each Loan Document to which it is a party remains in full force
and effect, except as expressly amended hereby, and (c) represents and warrants
to the Lenders that on and as of the date hereof, and immediately after giving
effect to the terms of this Amendment: (i) all of the representations and
warranties contained in each Loan Document to which it is a party are true and
correct in all material respects (except those which have a materiality
qualifier, which shall be true and correct as so qualified), except to the
extent any such representations and warranties are expressly limited to an
earlier date, in which case, such representations and warranties shall continue
to be true and correct as of such specified earlier date; (ii) no Default or
Event of Default has occurred and is

2

--------------------------------------------------------------------------------

continuing and (iii) no event or events have occurred which individually or in
the aggregate could reasonably be expected to have a Material Adverse Effect.

        Section 4.03    Loan Document.    This Amendment is a Loan Document.

        Section 4.04    Counterparts.    This Amendment may be executed by one
or more of the parties hereto in any number of separate counterparts, and all of
such counterparts taken together shall be deemed to constitute one and the same
instrument. Delivery of this Amendment by facsimile or electronic transmission
in portable document format (.pdf) shall be effective as delivery of a manually
executed counterpart hereof.

        Section 4.05    NO ORAL AGREEMENT.    THIS AMENDMENT, THE CREDIT
AGREEMENT AND THE OTHER LOAN DOCUMENTS EXECUTED IN CONNECTION HEREWITH AND
THEREWITH REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR UNWRITTEN ORAL AGREEMENTS
OF THE PARTIES. THERE ARE NO ORAL AGREEMENTS BETWEEN THE PARTIES.

        Section 4.06    GOVERNING LAW.    THIS AMENDMENT SHALL BE GOVERNED BY,
AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

        Section 4.07    Severability.    Any provision of this Amendment which
is prohibited or unenforceable in any jurisdiction shall, as to such
jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions hereof, and any
such prohibition or unenforceability in any jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction.

        Section 4.08    Successors and Assigns.    This Amendment shall be
binding upon and inure to the benefit of the parties hereto and their respective
successors and assigns.

3

--------------------------------------------------------------------------------

[Counterpart signature pages follow.]

4

--------------------------------------------------------------------------------

        IN WITNESS WHEREOF, each of the undersigned has caused its duly
authorized officer to execute and deliver this Amendment as of the date first
written above.

BORROWER:

  HALCÓN RESOURCES CORPORATION

 

By:

 

/s/ MARK J. MIZE

--------------------------------------------------------------------------------

      Name:   Mark J. Mize

      Title:   Executive Vice President, Chief Financial Officer and Treasurer

   

Signature Page to Third Amendment to Amended and Restated Senior Secured
Revolving Credit Agreement Halcón Resources Corporation

--------------------------------------------------------------------------------

GUARANTORS:

  HALCÓN HOLDINGS, INC.
HALCÓN RESOURCES OPERATING, INC.
HALCÓN ENERGY PROPERTIES, INC.
HALCÓN OPERATING CO., INC.
HALCÓN FIELD SERVICES, LLC
HALCÓN PERMIAN, LLC

 

By:

 

/s/ MARK J. MIZE

--------------------------------------------------------------------------------

      Name:   Mark J. Mize

      Title:   Executive Vice President, Chief Financial Officer and Treasurer

   

Signature Page to Third Amendment to Amended and Restated Senior Secured
Revolving Credit Agreement Halcón Resources Corporation

--------------------------------------------------------------------------------

  JPMORGAN CHASE BANK, N.A.,
as Administrative Agent and a Lender

 

By:

 

/s/ SON HOANG

--------------------------------------------------------------------------------

      Name:   Son Hoang

      Title:   Authorized officer

   

Signature Page to Third Amendment to Amended and Restated Senior Secured
Revolving Credit Agreement Halcón Resources Corporation

--------------------------------------------------------------------------------

  BMO HARRIS BANK N.A.
as a Lender

 

By:

 

/s/ JAMES V. DUCOTE

--------------------------------------------------------------------------------

      Name:   James V. Ducote

      Title:   Managing Director

   

Signature Page to Third Amendment to Amended and Restated Senior Secured
Revolving Credit Agreement Halcón Resources Corporation

--------------------------------------------------------------------------------

  WELLS FARGO BANK, NATIONAL ASSOCIATION
as a Lender

 

By:

 

/s/ BETSY JOCHER

--------------------------------------------------------------------------------

      Name:   Betsy Jocher

      Title:   Director

   

Signature Page to Third Amendment to Amended and Restated Senior Secured
Revolving Credit Agreement Halcón Resources Corporation

--------------------------------------------------------------------------------

  BANK OF AMERICA, N.A.,
as Exiting Lender

 

By:

 

/s/ MICHAEL CLAYBORNE

--------------------------------------------------------------------------------

      Name:   Michael Clayborne

      Title:   Director

   

Signature Page to Third Amendment to Amended and Restated Senior Secured
Revolving Credit Agreement Halcón Resources Corporation

--------------------------------------------------------------------------------

  NATIXIS, NEW YORK BRANCH,
as a Lender

 

By:

 

/s/ CARLOS QUINTEROS

--------------------------------------------------------------------------------

      Name:   Carlos Quinteros

      Title:   Managing Director

 

By:

 

/s/ VIKRAM NATH

--------------------------------------------------------------------------------

      Name:   Vikram Nath

      Title:   Director

   

Signature Page to Third Amendment to Amended and Restated Senior Secured
Revolving Credit Agreement Halcón Resources Corporation

--------------------------------------------------------------------------------

  ROYAL BANK OF CANADA,
as a Lender

 

By:

 

/s/ KRISTAN SPIVEY

--------------------------------------------------------------------------------

      Name:   Kristan Spivey

      Title:   Authorized Signatory

   

Signature Page to Third Amendment to Amended and Restated Senior Secured
Revolving Credit Agreement Halcón Resources Corporation

--------------------------------------------------------------------------------

  GOLDMAN SACHS LENDING PARTNERS LLC,
as a Lender

 

By:

 

/s/ REBECCA KRATZ

--------------------------------------------------------------------------------

      Name:   Rebecca Kratz

      Title:   Authorized Signatory

   

Signature Page to Third Amendment to Amended and Restated Senior Secured
Revolving Credit Agreement Halcón Resources Corporation

--------------------------------------------------------------------------------

ANNEX I
LIST OF MAXIMUM CREDIT AMOUNTS

Name of Lender
  Applicable Percentage   Maximum Credit Amount  

JPMorgan Chase Bank, N.A. 

    23.81 % $ 238,095,238.11  

BMO Harris Bank N.A. 

    23.81 % $ 238,095,238.11  

Wells Fargo Bank, National Association

    17.86 % $ 178,571,428.57  

Natixis, New York Branch

    11.90 % $ 119,047,619.07  

Royal Bank of Canada

    11.90 % $ 119,047,619.00  

Goldman Sachs Lending Partners LLC

    10.71 % $ 107,142,857.14  

TOTAL

    100.00 % $ 1,000,000,000.00  

ANNEX I

--------------------------------------------------------------------------------

QuickLinks

Exhibit 10.1.2

THIRD AMENDMENT TO AMENDED AND RESTATED SENIOR SECURED REVOLVING CREDIT
AGREEMENT
RECITALS
ARTICLE I AMENDMENTS TO CREDIT AGREEMENT
ARTICLE II REALLOCATION
ARTICLE III CONDITIONS PRECEDENT
ARTICLE IV MISCELLANEOUS
ANNEX I LIST OF MAXIMUM CREDIT AMOUNTS