Red Hat Product Errata RHSA-2026:42075 - Security Advisory Issued: 2026-07-20 Updated: 2026-07-20 RHSA-2026:42075 - Security Advisory Overview Updated Packages Synopsis Important: pacemaker security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for pacemaker is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description The Pacemaker cluster resource manager is a collection of technologies working together to maintain data integrity and application availability in the event of failures. Security Fix(es): pacemaker: Pacemaker: Denial of Service via integer overflow in remote message decompression (CVE-2026-10649) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.4 x86_64 Red Hat Enterprise Linux Server - AUS 8.4 x86_64 Red Hat Enterprise Linux High Availability for x86_64 - Advanced Update Support 8.4 x86_64 Red Hat Enterprise Linux High Availability for x86_64 - Extended Life Cycle Long Life 8.4 x86_64 Fixes BZ - 2462817 - CVE-2026-10649 pacemaker: Pacemaker: Denial of Service via integer overflow in remote message decompression CVEs CVE-2026-10649 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.4 SRPM pacemaker-2.0.5-9.el8_4.12.src.rpm SHA-256: 60c087fd8a6408b478a69f6f418f64e73f7b43c0a31b021dd977c65444d47598 x86_64 pacemaker-cli-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 6144b34f0189f46670148a5b9f0444f14c902986286d3284e710500a2c3b63f4 pacemaker-cli-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 5b2310ac301449cda12834d68cd0b04655fb4e6113853bed87af4a217a3d283c pacemaker-cluster-libs-2.0.5-9.el8_4.12.i686.rpm SHA-256: 8c1989d2b939cd39958cb8eb7b04bbe14a12030273a50be781b8b30082a01f6a pacemaker-cluster-libs-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 0c81571ea08c8157a1967103a6e88cbe8c05f63b1d944a5b83dd331b2ebf8232 pacemaker-cluster-libs-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: e1d816fe0e2820032e1733fac8ef21a1fd836a1813fabc36d2d73080ea122178 pacemaker-cluster-libs-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 0e4ff58dda0bf4e5bc7a98205adcf8a23bdbe7da3f19035adb86e54d178ba2fb pacemaker-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 1351d3868c6fc6b0cb66d62c97576ad79dc2bb9dbb42ef79b9d14eb35704a053 pacemaker-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 98da2e056534d72a3c0138b67bb6b309d4e4b0dd8731954b966cacb8f7857e6e pacemaker-debugsource-2.0.5-9.el8_4.12.i686.rpm SHA-256: 302c11bf1bd77cf4c4d2535a275574c50218b585a5d75a3ff955b782ada620b5 pacemaker-debugsource-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 8598fee04d9b65300a47bd7beb5c33cf6ad94bbdf2c8dc7590669d691f3e7f13 pacemaker-libs-2.0.5-9.el8_4.12.i686.rpm SHA-256: 46eae7989aba19b2c714f8d1cdf65847d55a11b79c43055b9ae7f8b89544f30c pacemaker-libs-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 3c3e60389a5a1f2f6d74dfc857479de527594489568685a42e654720d37917ba pacemaker-libs-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 7e86843d1465ff0c388777b40d87bb510d3f618e5878b398724a6fa48560d968 pacemaker-libs-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: f7e1f7524ecef04e2e502451b9bef4d0a0273b19425f1964c43c943562c7333e pacemaker-remote-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 62189ef3ea6c618a4e0176696fd6b10d677e207aa2159672472a6d235dd4a120 pacemaker-remote-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 97bc353e7f4d064e8f5d1dc9b968b520ad84cd0306533247ab578cfc9cc1659c pacemaker-schemas-2.0.5-9.el8_4.12.noarch.rpm SHA-256: 888eef582a65d298000b2500130178bd3087174ad7b96e073d2206edd1df483c Red Hat Enterprise Linux Server - AUS 8.4 SRPM pacemaker-2.0.5-9.el8_4.12.src.rpm SHA-256: 60c087fd8a6408b478a69f6f418f64e73f7b43c0a31b021dd977c65444d47598 x86_64 pacemaker-cli-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 6144b34f0189f46670148a5b9f0444f14c902986286d3284e710500a2c3b63f4 pacemaker-cli-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 5b2310ac301449cda12834d68cd0b04655fb4e6113853bed87af4a217a3d283c pacemaker-cluster-libs-2.0.5-9.el8_4.12.i686.rpm SHA-256: 8c1989d2b939cd39958cb8eb7b04bbe14a12030273a50be781b8b30082a01f6a pacemaker-cluster-libs-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 0c81571ea08c8157a1967103a6e88cbe8c05f63b1d944a5b83dd331b2ebf8232 pacemaker-cluster-libs-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: e1d816fe0e2820032e1733fac8ef21a1fd836a1813fabc36d2d73080ea122178 pacemaker-cluster-libs-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 0e4ff58dda0bf4e5bc7a98205adcf8a23bdbe7da3f19035adb86e54d178ba2fb pacemaker-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 1351d3868c6fc6b0cb66d62c97576ad79dc2bb9dbb42ef79b9d14eb35704a053 pacemaker-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 98da2e056534d72a3c0138b67bb6b309d4e4b0dd8731954b966cacb8f7857e6e pacemaker-debugsource-2.0.5-9.el8_4.12.i686.rpm SHA-256: 302c11bf1bd77cf4c4d2535a275574c50218b585a5d75a3ff955b782ada620b5 pacemaker-debugsource-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 8598fee04d9b65300a47bd7beb5c33cf6ad94bbdf2c8dc7590669d691f3e7f13 pacemaker-libs-2.0.5-9.el8_4.12.i686.rpm SHA-256: 46eae7989aba19b2c714f8d1cdf65847d55a11b79c43055b9ae7f8b89544f30c pacemaker-libs-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 3c3e60389a5a1f2f6d74dfc857479de527594489568685a42e654720d37917ba pacemaker-libs-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 7e86843d1465ff0c388777b40d87bb510d3f618e5878b398724a6fa48560d968 pacemaker-libs-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: f7e1f7524ecef04e2e502451b9bef4d0a0273b19425f1964c43c943562c7333e pacemaker-remote-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 62189ef3ea6c618a4e0176696fd6b10d677e207aa2159672472a6d235dd4a120 pacemaker-remote-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 97bc353e7f4d064e8f5d1dc9b968b520ad84cd0306533247ab578cfc9cc1659c pacemaker-schemas-2.0.5-9.el8_4.12.noarch.rpm SHA-256: 888eef582a65d298000b2500130178bd3087174ad7b96e073d2206edd1df483c Red Hat Enterprise Linux High Availability for x86_64 - Advanced Update Support 8.4 SRPM x86_64 pacemaker-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 5ba1984078b0b507d5ad70f3ea9611eafcc16b9e4e34715ce3e05f1838772b8e pacemaker-cli-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 69259c261ed1c7080cc70ab161a8ad46c428c6c5768523a7d67654ab338ff043 pacemaker-cli-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 6144b34f0189f46670148a5b9f0444f14c902986286d3284e710500a2c3b63f4 pacemaker-cli-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 5b2310ac301449cda12834d68cd0b04655fb4e6113853bed87af4a217a3d283c pacemaker-cluster-libs-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: e1d816fe0e2820032e1733fac8ef21a1fd836a1813fabc36d2d73080ea122178 pacemaker-cluster-libs-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 0e4ff58dda0bf4e5bc7a98205adcf8a23bdbe7da3f19035adb86e54d178ba2fb pacemaker-cts-2.0.5-9.el8_4.12.noarch.rpm SHA-256: c3b411043489e12d4762fb1afced0823e04a3913130ec06bd07dee9321a2625c pacemaker-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 1351d3868c6fc6b0cb66d62c97576ad79dc2bb9dbb42ef79b9d14eb35704a053 pacemaker-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 98da2e056534d72a3c0138b67bb6b309d4e4b0dd8731954b966cacb8f7857e6e pacemaker-debugsource-2.0.5-9.el8_4.12.i686.rpm SHA-256: 302c11bf1bd77cf4c4d2535a275574c50218b585a5d75a3ff955b782ada620b5 pacemaker-debugsource-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 8598fee04d9b65300a47bd7beb5c33cf6ad94bbdf2c8dc7590669d691f3e7f13 pacemaker-doc-2.0.5-9.el8_4.12.noarch.rpm SHA-256: 04cab369d7b6d9bc2ec6451a76f89222e86780ecae3785bfe06c39294fd88a4f pacemaker-libs-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 7e86843d1465ff0c388777b40d87bb510d3f618e5878b398724a6fa48560d968 pacemaker-libs-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: f7e1f7524ecef04e2e502451b9bef4d0a0273b19425f1964c43c943562c7333e pacemaker-libs-devel-2.0.5-9.el8_4.12.i686.rpm SHA-256: a9c68d4b82e570bfdaf55273b4d00fe4b243364f25aeb1558feadeea3be263b6 pacemaker-libs-devel-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 0551caa72bfcb70e1abd1eced510763a8fd6a43c0f19815d6d3f62832803b4ee pacemaker-nagios-plugins-metadata-2.0.5-9.el8_4.12.noarch.rpm SHA-256: ae89c4ca32aa17ca52ac47145658e8abe654df8f533b4571e9c72af6adf0af1b pacemaker-remote-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 3f3e91a938f9b5fddf26dd538ad4a5b2da65804e0c8c17b75a026e093c407ee9 pacemaker-remote-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 62189ef3ea6c618a4e0176696fd6b10d677e207aa2159672472a6d235dd4a120 pacemaker-remote-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 97bc353e7f4d064e8f5d1dc9b968b520ad84cd0306533247ab578cfc9cc1659c Red Hat Enterprise Linux High Availability for x86_64 - Extended Life Cycle Long Life 8.4 SRPM x86_64 pacemaker-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 5ba1984078b0b507d5ad70f3ea9611eafcc16b9e4e34715ce3e05f1838772b8e pacemaker-cli-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 69259c261ed1c7080cc70ab161a8ad46c428c6c5768523a7d67654ab338ff043 pacemaker-cli-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: 6144b34f0189f46670148a5b9f0444f14c902986286d3284e710500a2c3b63f4 pacemaker-cli-debuginfo-2.0.5-9.el8_4.12.x86_64.rpm SHA-256: 5b2310ac301449cda12834d68cd0b04655fb4e6113853bed87af4a217a3d283c pacemaker-cluster-libs-debuginfo-2.0.5-9.el8_4.12.i686.rpm SHA-256: e1d816fe0e2820032e1733fac8ef21a1fd836a1813fabc36d2