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OpenAdvisories
High 1 exploited CVE RHSA-2025:17733 1 CVE

Red Hat Security Advisory: kernel security update

Published Oct 11, 2025 · Updated Aug 26, 2026

Ecosystem: Red Hat

Fixed packages 19

ReleasePackageFixed in
Red Hat · RHEL 6 ELS rhel_els:6 kernel 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-abi-whitelists 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-debug 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-debug-debuginfo 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-debug-devel 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-debuginfo 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-debuginfo-common-i686 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-debuginfo-common-s390x 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-debuginfo-common-x86_64 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-devel 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-doc 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-firmware 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-kdump 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-kdump-debuginfo 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 kernel-kdump-devel 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 perf 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 perf-debuginfo 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 python-perf 0:2.6.32-754.58.1.el6
Red Hat · RHEL 6 ELS rhel_els:6 python-perf-debuginfo 0:2.6.32-754.58.1.el6

Vulnerabilities 1

  • High 8.3
    CVE-2021-22555 Exploited Public exploit EPSS 79%

    Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE

    A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space

    linux-raspi2 linux-hwe linux-azure linux-riscv Linux Debian Ubuntu
    KEV Oct 6, 2025

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=1980101
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_17733.json
  • report
    https://access.redhat.com/security/cve/CVE-2021-22555
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2021-22555
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2021-22555
  • article
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d
  • article
    https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528
  • article
    https://www.cisa.gov/known-exploited-vulnerabilities-catalog