- Issued:
- 2026-10-27
- Updated:
- 2026-10-27
RHSA-2026:90933 - Security Advisory
Synopsis
Important: kernel security update
Type/Severity
Security Advisory: Important
Red Hat Lightspeed patch analysis
Identify and remediate systems affected by this advisory.
Topic
An update for kernel is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION.
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 kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
- kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999)
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
The system must be rebooted for this update to take effect.
Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.
Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.
Affected Products
- Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
- Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
- Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x
Fixes
- BZ - 2553429 - CVE-2026-99999 kernel: ipv4: validate checksum_start before completing checksum
CVEs
Note:
More recent versions of these packages may be available.
Click a package name for more details.
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6
| SRPM | |
|---|---|
| kernel-2.6.32-754.66.1.el6.src.rpm | SHA-256: 107dd2f671fa0b79e89fb88a7c0e37f018aa174beaf24f1d48ddb10e4c775ae7 |
| x86_64 | |
| kernel-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: ec6b4c5b9735adfb2538b365520d4a7e7998df751fc2d41c28e0cd90cb538acf |
| kernel-abi-whitelists-2.6.32-754.66.1.el6.noarch.rpm | SHA-256: 99865883248e0285871839011f0c1afc1f2319ad80f3bcb38a85cf6a18b9c9cc |
| kernel-debug-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: db654fd7faf1bda867ebff23380d72cda1526577cf5396fe0f0c02c63daa210e |
| kernel-debug-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 1e72dae63dea8901b3f34ef2f5ddccff0d82e3b1b729b7211e57401218aa48c3 |
| kernel-debug-debuginfo-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: 26fb87467305f058cc0a7d6192dab108b9f8678fda57feba34d7a5cc4b1ef1c7 |
| kernel-debug-debuginfo-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: 26fb87467305f058cc0a7d6192dab108b9f8678fda57feba34d7a5cc4b1ef1c7 |
| kernel-debug-devel-2.6.32-754.66.1.el6.i686.rpm | SHA-256: b35342692aa44c004a89eda934dffbbf4c28c7578e10758a2fbe1a887f86d22d |
| kernel-debug-devel-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: 8b005eb983fb9ae53b2ae9a9cead5550bae31cd2d603c8f994c3296f741a44ca |
| kernel-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 8772e3d385b546437f2b67c063a34d8b9432473a78c293f1228c7be7658112aa |
| kernel-debuginfo-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: 6b62032328517ed5e8956a63468f036dd3ef36260ef536d0c4e53d008892b960 |
| kernel-debuginfo-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: 6b62032328517ed5e8956a63468f036dd3ef36260ef536d0c4e53d008892b960 |
| kernel-debuginfo-common-i686-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 493252af9e1629f190933ec799bb432fec7be50c1c77fd9c4d84bc30860ba9bf |
| kernel-debuginfo-common-x86_64-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: cef17cd476cbdaa7108482d5daeb903d974b0560cd1c8fd2a667cbefb3005c12 |
| kernel-debuginfo-common-x86_64-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: cef17cd476cbdaa7108482d5daeb903d974b0560cd1c8fd2a667cbefb3005c12 |
| kernel-devel-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: 1447de4c82108f8e0ffca8fb1026fd04790547654489a9bc506e1e9285eac402 |
| kernel-doc-2.6.32-754.66.1.el6.noarch.rpm | SHA-256: d5e087ba414217831bfd59492b4642c3d9fe31b206181fe9fc229e154adc39ba |
| kernel-firmware-2.6.32-754.66.1.el6.noarch.rpm | SHA-256: 422a4dfa84980bb66db8d32155b4ed4475ec2c508f14a302d3e98ec131d182ac |
| kernel-headers-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: 3124de74a07834830e0136a49aa35e4519ef8ac49512ae037f9b4c5ad2769219 |
| perf-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: 4296c729e4da36b5e03c0749694c1baba2efb779bf39cf99c7bb63a5120f2802 |
| perf-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 941613b8e2bc6aa3cc5301b1ef583d320a3c8031bf9ee7eb9daf9b995b7c8957 |
| perf-debuginfo-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: 652d37a77330ab078d27c769ccf44e693a28682eb3c669924671980b0d73e05b |
| perf-debuginfo-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: 652d37a77330ab078d27c769ccf44e693a28682eb3c669924671980b0d73e05b |
| python-perf-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: ff4aa25afbce3365271cd1ec9609029e59d25baf7b2794755f700c583f42e595 |
| python-perf-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: e9ee682b3e04b7c0d3d8911c66b059c15e39743c712118aad8ee6e175744af37 |
| python-perf-debuginfo-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: d078ff7ee611924fa34659b4a39533c729625170f8e64bdb72bc0ed3ae5a9799 |
| python-perf-debuginfo-2.6.32-754.66.1.el6.x86_64.rpm | SHA-256: d078ff7ee611924fa34659b4a39533c729625170f8e64bdb72bc0ed3ae5a9799 |
| i386 | |
| kernel-2.6.32-754.66.1.el6.i686.rpm | SHA-256: c2c9d4665f00e2baa55c964d193d3d61c311323dcb161a21b5fd9951a46806c6 |
| kernel-abi-whitelists-2.6.32-754.66.1.el6.noarch.rpm | SHA-256: 99865883248e0285871839011f0c1afc1f2319ad80f3bcb38a85cf6a18b9c9cc |
| kernel-debug-2.6.32-754.66.1.el6.i686.rpm | SHA-256: b4951aace080dfe69484124730dab5f23271536de60cb4505130147b0080caba |
| kernel-debug-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 1e72dae63dea8901b3f34ef2f5ddccff0d82e3b1b729b7211e57401218aa48c3 |
| kernel-debug-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 1e72dae63dea8901b3f34ef2f5ddccff0d82e3b1b729b7211e57401218aa48c3 |
| kernel-debug-devel-2.6.32-754.66.1.el6.i686.rpm | SHA-256: b35342692aa44c004a89eda934dffbbf4c28c7578e10758a2fbe1a887f86d22d |
| kernel-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 8772e3d385b546437f2b67c063a34d8b9432473a78c293f1228c7be7658112aa |
| kernel-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 8772e3d385b546437f2b67c063a34d8b9432473a78c293f1228c7be7658112aa |
| kernel-debuginfo-common-i686-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 493252af9e1629f190933ec799bb432fec7be50c1c77fd9c4d84bc30860ba9bf |
| kernel-debuginfo-common-i686-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 493252af9e1629f190933ec799bb432fec7be50c1c77fd9c4d84bc30860ba9bf |
| kernel-devel-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 40013ac403b99e78ea2d5e01419dbb996a3824d7eaf0c4468295313b8ebead06 |
| kernel-doc-2.6.32-754.66.1.el6.noarch.rpm | SHA-256: d5e087ba414217831bfd59492b4642c3d9fe31b206181fe9fc229e154adc39ba |
| kernel-firmware-2.6.32-754.66.1.el6.noarch.rpm | SHA-256: 422a4dfa84980bb66db8d32155b4ed4475ec2c508f14a302d3e98ec131d182ac |
| kernel-headers-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 04f27cb2c169396a5c5a3f78832f00bc693a4c427efca257a304cc8268b6789c |
| perf-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 8afc4d3b2f073e285dece9dd59c583d248c74f9ae641879037644a78a9800547 |
| perf-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 941613b8e2bc6aa3cc5301b1ef583d320a3c8031bf9ee7eb9daf9b995b7c8957 |
| perf-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: 941613b8e2bc6aa3cc5301b1ef583d320a3c8031bf9ee7eb9daf9b995b7c8957 |
| python-perf-2.6.32-754.66.1.el6.i686.rpm | SHA-256: db73270f14f41532c8ffb0ce619025480d5f0eebebaf526b9f18db4d43353724 |
| python-perf-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: e9ee682b3e04b7c0d3d8911c66b059c15e39743c712118aad8ee6e175744af37 |
| python-perf-debuginfo-2.6.32-754.66.1.el6.i686.rpm | SHA-256: e9ee682b3e04b7c0d3d8911c66b059c15e39743c712118aad8ee6e175744af37 |
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6
| SRPM | |
|---|---|
| kernel-2.6.32-754.66.1.el6.src.rpm | SHA-256: 107dd2f671fa0b79e89fb88a7c0e37f018aa174beaf24f1d48ddb10e4c775ae7 |
| s390x | |
| kernel-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 026ec7b8c591a9fae781de03ad497913ec0fca7b6c28d7ce33697629248ec3eb |
| kernel-abi-whitelists-2.6.32-754.66.1.el6.noarch.rpm | SHA-256: 99865883248e0285871839011f0c1afc1f2319ad80f3bcb38a85cf6a18b9c9cc |
| kernel-debug-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 2e5cf4a4f63e6fda0d59bf2f7559f8e83ce0cfc840e4772da66361ddaaf1024a |
| kernel-debug-debuginfo-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: b69cce47f182f1b07d19dd478c64dcd187370d6e6b24360e7914a2cc5da2a10f |
| kernel-debug-debuginfo-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: b69cce47f182f1b07d19dd478c64dcd187370d6e6b24360e7914a2cc5da2a10f |
| kernel-debug-devel-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: e35f24cea1cc42e4d4b558a22c7eef2e24b9f8ecc109a6dd5f2c8ab67b5fe695 |
| kernel-debuginfo-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 7760b78304b0c93258048f99226aa012e2dc35a1f3974a83d8e1b963a843cf09 |
| kernel-debuginfo-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 7760b78304b0c93258048f99226aa012e2dc35a1f3974a83d8e1b963a843cf09 |
| kernel-debuginfo-common-s390x-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: a226c3932da7a00fccd7bf4f83310041157c038af27dd60835f284793b1fb48f |
| kernel-debuginfo-common-s390x-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: a226c3932da7a00fccd7bf4f83310041157c038af27dd60835f284793b1fb48f |
| kernel-devel-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 475446ed11e3b733a60e7693a77897a8ae314f1f097df91c50f95b88a838b6bb |
| kernel-doc-2.6.32-754.66.1.el6.noarch.rpm | SHA-256: d5e087ba414217831bfd59492b4642c3d9fe31b206181fe9fc229e154adc39ba |
| kernel-firmware-2.6.32-754.66.1.el6.noarch.rpm | SHA-256: 422a4dfa84980bb66db8d32155b4ed4475ec2c508f14a302d3e98ec131d182ac |
| kernel-headers-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 79e519adceadf5b6d4e18a0c7464857ca576c0a92e4811cf230afc59a1e590a6 |
| kernel-kdump-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 7864d1603f4b63024c4f5e3334620c85310cb29f6c83e9d6d31d9f9d778f4235 |
| kernel-kdump-debuginfo-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: fc833acff5beea86a5f6f5cba904a9b3d60c29747bf955e9763ec71d24072231 |
| kernel-kdump-debuginfo-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: fc833acff5beea86a5f6f5cba904a9b3d60c29747bf955e9763ec71d24072231 |
| kernel-kdump-devel-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: f5a3ec5f40cd969fb30c6abc533409a20c83c295d20fda5ea7cb559879a32649 |
| perf-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: e58b4935b91a904c71e2c68d825a708f14347563992e0b7960826f8d2c2bdb30 |
| perf-debuginfo-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 1c50c210f875999553f6423c6031376001a64237b687dd46c05d2b0939473d52 |
| perf-debuginfo-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 1c50c210f875999553f6423c6031376001a64237b687dd46c05d2b0939473d52 |
| python-perf-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 3442fd2967ac7c6f3d68079418644822f96ebee338ece4796852bf84cfa5e3e7 |
| python-perf-debuginfo-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 231f7453fbd9f383a8a1f391032eb562d7e539d5763fd2a9bfb8cc03772c44a0 |
| python-perf-debuginfo-2.6.32-754.66.1.el6.s390x.rpm | SHA-256: 231f7453fbd9f383a8a1f391032eb562d7e539d5763fd2a9bfb8cc03772c44a0 |
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