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Kernel Security Update — AlmaLinux 8 (ALSA-2026:50978)

This is a security release for AlmaLinux 8. Update the product on every affected server to the patched release — there is no workaround, and unpatched servers remain exposed until updated.

High 7 CVSS
AlmaLinux 8

Fix Commands

EL8+ (AlmaLinux/CloudLinux/Rocky)

sudo dnf update

What this means under a SharedLicense license

Kernel flaws of this class (top severity in the notice's own data: CVSS 7, CWE-1189) are local-attacker material — crashes or privilege-adjacent outcomes — so shared-hosting servers should treat this as routine-priority patching.

aarch64 kernel-tools-4.18.0-553.153.1.el8_10.aarch64.rpm 085edb8f6ecb0c37b63064e1c078b4080c44f22c7203d83fb56e3ea258b3b0a3 aarch64 kernel-debug-core-4.18.0-553.153.1.el8_10.aarch64.rpm 329cc575e1025fb0475a05cde8523b32da8b3299ba77762cee8ad4087de15a82 aarch64 kernel-core-4.18.0-553.153.1.el8_10.aarch64.rpm 52e8283073dee395dd48b0260054a1615a71e310f6a7879ff0a85721ed0f8b9e aarch64 kernel-4.18.0-553.153.1.el8_10.aarch64.rpm 57b53384c44496663a7c5bc40ae43e4d91fa9285b20f2ca625c5d6bea7ef090e aarch64 kernel-debug-modules-4.18.0-553.153.1.el8_10.aarch64.rpm 62d28320da64b3a7c974bb69988f1ad738aed5627605a5f35d24b04eb9d76e01 aarch64 python3-perf-4.18.0-553.153.1.el8_10.aarch64.rpm 651bc117db2d5c6f1bdf271f3b9066ae008af8817ea1ecb9feaaf94fdcb86861 aarch64 kernel-headers-4.18.0-553.153.1.el8_10.aarch64.rpm 765c488b3ecc4d0d940af6da7f4c821ec1dbf32aca21fd956624aa9d467d3871 aarch64 kernel-debug-4.18.0-553.153.1.el8_10.aarch64.rpm 787d62fd3e8b7b619f92e88adae3acad6501d119802009aad5bc56600b0e9612 aarch64 perf-4.18.0-553.153.1.el8_10.aarch64.rpm 7ea6a082b2523721f6bee9288f92174e8a037d524e55638fbb949ddaa1852556 aarch64 bpftool-4.18.0-553.153.1.el8_10.aarch64.rpm 81dbdc60aa7561e988882dceeee1d16ac00628e3359ccb9325a66092da869a5e aarch64 kernel-modules-extra-4.18.0-553.153.1.el8_10.aarch64.rpm 86616a12720f4e31d6fc70a780d765a9fe65e0a9acb1e2c062c695e0a628d2a1 aarch64 kernel-cross-headers-4.18.0-553.153.1.el8_10.aarch64.rpm 8d772355bc54bd334257dc370a90c4732e9a486fb68953aadade5615e97019db aarch64 kernel-tools-libs-4.18.0-553.153.1.el8_10.aarch64.rpm a7e136b4c15fc2d67822a087ae8ed025912a6b713f6bb89cd04d905611e0e9b8 aarch64 kernel-debug-devel-4.18.0-553.153.1.el8_10.aarch64.rpm abf4bb6c7d911f6cb6b1af0725a36abc3feec8686a1d1a3a0f8a6d5a2fa92072 aarch64 kernel-debug-modules-extra-4.18.0-553.153.1.el8_10.aarch64.rpm b6ecc92cdc98395716a5bd9b06a0cb14b3beb5a0e7f27554e6c35cfb1ecb09ec aarch64 kernel-tools-libs-devel-4.18.0-553.153.1.el8_10.aarch64.rpm dc3c6daaeb7165cba41d5ca1b658c0b604021e5104fcf83be18d075855c745bb aarch64 kernel-devel-4.18.0-553.153.1.el8_10.aarch64.rpm f2ad12f7a50ad15c71a979768b7b98d54e7eb44f1c0e23c0b4893648e78f71b7 aarch64 kernel-modules-4.18.0-553.153.1.el8_10.aarch64.rpm f3af3027edd2b590a82cc94e9ff9c6ec15cf4c519184c52fdbdc08d0d00c810d noarch kernel-doc-4.18.0-553.153.1.el8_10.noarch.rpm 87d72e73e84074737fe8bc3391bd2516ea8944467740e4a5fa3eb82f4f00877e noarch kernel-abi-stablelists-4.18.0-553.153.1.el8_10.noarch.rpm f0876a37fcef63bbc3fab21ae03d198c3b848a1b708f2c77e5835286318f535d ppc64le kernel-cross-headers-4.18.0-553.153.1.el8_10.ppc64le.rpm 21f3d283b5a1c6f565c6f0c8533f6fd3a1b06f5703f5b5bb656f40c74f6d4c01 ppc64le kernel-devel-4.18.0-553.153.1.el8_10.ppc64le.rpm 2298dc4358e4f88be92fa3ca15a1ea571ed02378dd6a59e5e51ce29931dacbf1 ppc64le bpftool-4.18.0-553.153.1.el8_10.ppc64le.rpm 265afbadf6ab2b0ec5f7687404ca0a9f1219a6728acd1f5db7a9714e5a0e7005 ppc64le kernel-debug-core-4.18.0-553.153.1.el8_10.ppc64le.rpm 293f1781281b6581aea7d8015f827cdfc6b3e113034ec029f272547f778c955c ppc64le kernel-modules-4.18.0-553.153.1.el8_10.ppc64le.rpm 5e46bb936b142789fbbf16839a4c040a8cea0b97680fdf5130bf9b24c429d109 ppc64le perf-4.18.0-553.153.1.el8_10.ppc64le.rpm 78013cc1725aaa220efae70ece593f3a42c581ddc777d63331c678a511908073 ppc64le kernel-core-4.18.0-553.153.1.el8_10.ppc64le.rpm 7c80969326d850b918514b43365669ab658af3e633270f6a5be472b6761478bb ppc64le kernel-tools-libs-4.18.0-553.153.1.el8_10.ppc64le.rpm 866e8101eee0b0c81ffd9188e6aca464580acaa2adbce99d004672e434572690 ppc64le kernel-4.18.0-553.153.1.el8_10.ppc64le.rpm 9ac8c4113ffc25228939941f5b4bae97c46b2bc818ad3b99de8437ab6c653ad4 ppc64le kernel-modules-extra-4.18.0-553.153.1.el8_10.ppc64le.rpm a20ad8844b08b2f3baa1162e89efd5fa29973b836d61edf7f1f98634aa784dec ppc64le kernel-debug-modules-extra-4.18.0-553.153.1.el8_10.ppc64le.rpm a7e0f5c0e615a073c2e49cba965f01677ddfc2840ee05beede6d659058b972ad ppc64le kernel-tools-4.18.0-553.153.1.el8_10.ppc64le.rpm c3e654d6fcaa60d547d9924084f8109b11021768e8562cb802178696197f7eda ppc64le kernel-debug-modules-4.18.0-553.153.1.el8_10.ppc64le.rpm d09f8dc5563ccd8e23248ec3d0cf41390883074e3f5ecd384cb87525911916ae ppc64le kernel-tools-libs-devel-4.18.0-553.153.1.el8_10.ppc64le.rpm e770449204c83869ef6d87df8801ea9d652d1a5a9262b3baa4c435bcb61ab5f5 ppc64le python3-perf-4.18.0-553.153.1.el8_10.ppc64le.rpm f060dff4d7972081adaae65ee59da6ae0c0474596f531b3b6c600ef73c1fcba4 ppc64le kernel-debug-devel-4.18.0-553.153.1.el8_10.ppc64le.rpm f3c71f31ab06cec0d90a4b1a73deaa1491eb5afd4a405d43e8e9eca1cefc7c83 ppc64le kernel-headers-4.18.0-553.153.1.el8_10.ppc64le.rpm f3fdcfd4c6164cb5c8c7325ec8c48f04d46a76ca3c6a1f017d71b697d10cd2b4 ppc64le kernel-debug-4.18.0-553.153.1.el8_10.ppc64le.rpm f70fbdb9dfb9c30fbfddce86377c5c6363de5b4c70acf002dee0c1973acdc7f9 s390x kernel-devel-4.18.0-553.153.1.el8_10.s390x.rpm 0443c87f2cc7afe83fe8660dc2f6ca17bdd35f1dc3b4e0ca0e9eeceb14e581dd s390x python3-perf-4.18.0-553.153.1.el8_10.s390x.rpm 1e670fce90dc6718189d9e1043b20999ac0b4d4456c4936f9c2d75b23de3f473 s390x kernel-debug-4.18.0-553.153.1.el8_10.s390x.rpm 1f92ee683dcc1b6d9611d6b0d8cd5ec3fa766758fbbf7c9fcec37347ae8084d1 s390x kernel-modules-extra-4.18.0-553.153.1.el8_10.s390x.rpm 4334cfe5082b9c458d5a6a2577285f4863b4a9ef04057de06654e12146745882 s390x kernel-debug-core-4.18.0-553.153.1.el8_10.s390x.rpm 4df48eb379f31ca307cdc7f4fd793bb74b51412589d421b547207411cc0f992b s390x kernel-cross-headers-4.18.0-553.153.1.el8_10.s390x.rpm 5a5c67801ff01647aca4ca57dd2b582bd2e23513d31cec324cb95bea217cdd6d s390x kernel-tools-4.18.0-553.153.1.el8_10.s390x.rpm 5bede821e4a667cb6db39b49d8f1636ed0d6b28e56c0e9d9c4c6071746b68a5e s390x kernel-4.18.0-553.153.1.el8_10.s390x.rpm 5c688ca7041f2f12eb8fc4f0682568e54fc3c406028d4ded49005262d2866d99 s390x kernel-zfcpdump-modules-extra-4.18.0-553.153.1.el8_10.s390x.rpm 6a6bf50cc372b7f837fa3b675e50ed70ddb2fe52b5b56e4f97569558ccd1bce0 s390x kernel-debug-modules-extra-4.18.0-553.153.1.el8_10.s390x.rpm 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Frequently Asked Questions

What does ALSA-2026:50978 fix?
1 kernel CVEs for AlmaLinux 8, including xen: AMD Zen 2 Processors: Privilege escalation via improper CPU cache isolation (CVE-2025-54518).
Is a reboot required?
Yes — kernel fixes only take effect after the server boots into the updated kernel.
How do I apply it?
Run dnf update (kernel packages) and schedule the reboot.

References

Security Advisories

Related Advisories

Qt5-Qtdeclarative Security Update — AlmaLinux 8 (ALSA-2026:96075)

2026-11-10

Webkit2gtk3 Security Update — AlmaLinux 8 (ALSA-2026:96080)

2026-11-09

Util-Linux Security Update — AlmaLinux 8 (ALSA-2026:96212)

2026-11-09

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