title: Kernel: ktls overwrites readonly memory pages when using function splice with a ktls socket as destination
description: An out-of-bounds memory write flaw was found in the Linux kernel’s Transport Layer Security functionality in how a user calls a function splice with a ktls socket as the destination. This flaw allows a local user to crash or potentially escalate their privileges on the system.
affected:
{
product: kernel
vendor: n/a
versions:
version: 6.7-rc5, status: unaffected
}
{
product: kernel
vendor: n/a
defaultStatus: affected
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: affected
versions:
version: 0:4.18.0-513.18.1.rt7.320.el8_9, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:enterprise_linux:8::realtime, cpe:/a:redhat:enterprise_linux:8::nfv]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8
collectionURL: https://access.redhat.com/downloads/content/package-browser/
defaultStatus: unaffected
packageName: kpatch-patch
cpe: cpe:/o:redhat:enterprise_linux:8::baseos
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-513.18.1.el8_9, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:enterprise_linux:8::crb, cpe:/o:redhat:enterprise_linux:8::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.2 Advanced Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-193.128.1.el8_2, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:rhel_aus:8.2::baseos, cpe:/o:redhat:rhel_tus:8.2::baseos, cpe:/o:redhat:rhel_e4s:8.2::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.2 Telecommunications Update Service
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: affected
versions:
version: 0:4.18.0-193.128.1.rt13.179.el8_2, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:rhel_tus:8.2::nfv, cpe:/a:redhat:rhel_tus:8.2::realtime]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.2 Telecommunications Update Service
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-193.128.1.el8_2, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:rhel_aus:8.2::baseos, cpe:/o:redhat:rhel_tus:8.2::baseos, cpe:/o:redhat:rhel_e4s:8.2::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-193.128.1.el8_2, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:rhel_aus:8.2::baseos, cpe:/o:redhat:rhel_tus:8.2::baseos, cpe:/o:redhat:rhel_e4s:8.2::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
collectionURL: https://access.redhat.com/downloads/content/package-browser/
defaultStatus: unaffected
packageName: kpatch-patch
cpe: cpe:/o:redhat:rhel_e4s:8.2::baseos
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-305.125.1.el8_4, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:rhel_e4s:8.4::baseos, cpe:/o:redhat:rhel_aus:8.4::baseos, cpe:/o:redhat:rhel_tus:8.4::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Telecommunications Update Service
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: affected
versions:
version: 0:4.18.0-305.125.1.rt7.201.el8_4, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:rhel_tus:8.4::realtime, cpe:/a:redhat:rhel_tus:8.4::nfv]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Telecommunications Update Service
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-305.125.1.el8_4, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:rhel_e4s:8.4::baseos, cpe:/o:redhat:rhel_aus:8.4::baseos, cpe:/o:redhat:rhel_tus:8.4::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-305.125.1.el8_4, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:rhel_e4s:8.4::baseos, cpe:/o:redhat:rhel_aus:8.4::baseos, cpe:/o:redhat:rhel_tus:8.4::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
collectionURL: https://access.redhat.com/downloads/content/package-browser/
defaultStatus: unaffected
packageName: kpatch-patch
cpe: cpe:/o:redhat:rhel_e4s:8.4::baseos
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-372.91.1.el8_6, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:enterprise_linux:8::hypervisor, cpe:/o:redhat:rhel_eus:8.6::baseos, cpe:/a:redhat:rhel_eus:8.6::crb]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
defaultStatus: unaffected
packageName: kpatch-patch
cpe: cpe:/o:redhat:rhel_eus:8.6::baseos
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.8 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
defaultStatus: unaffected
packageName: kpatch-patch
cpe: cpe:/o:redhat:rhel_eus:8.8::baseos
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.8 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-477.51.1.el8_8, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:rhel_eus:8.8::crb, cpe:/o:redhat:rhel_eus:8.8::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:5.14.0-362.24.1.el9_3, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:enterprise_linux:9::crb, cpe:/a:redhat:enterprise_linux:9::nfv, cpe:/a:redhat:enterprise_linux:9::realtime, cpe:/o:redhat:enterprise_linux:9::baseos, cpe:/a:redhat:enterprise_linux:9::appstream]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:5.14.0-362.24.1.el9_3, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:enterprise_linux:9::crb, cpe:/a:redhat:enterprise_linux:9::nfv, cpe:/a:redhat:enterprise_linux:9::realtime, cpe:/o:redhat:enterprise_linux:9::baseos, cpe:/a:redhat:enterprise_linux:9::appstream]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9
collectionURL: https://access.redhat.com/downloads/content/package-browser/
defaultStatus: unaffected
packageName: kpatch-patch
cpe: cpe:/o:redhat:enterprise_linux:9::baseos
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9.0 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:5.14.0-70.93.2.el9_0, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:rhel_eus:9.0::appstream, cpe:/o:redhat:rhel_eus:9.0::baseos, cpe:/a:redhat:rhel_eus:9.0::crb]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9.0 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: affected
versions:
version: 0:5.14.0-70.93.1.rt21.165.el9_0, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:rhel_eus:9.0::nfv, cpe:/a:redhat:rhel_eus:9.0::realtime]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9.0 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
defaultStatus: unaffected
packageName: kpatch-patch
cpe: cpe:/o:redhat:rhel_eus:9.0::baseos
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9.2 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:5.14.0-284.52.1.el9_2, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:rhel_eus:9.2::appstream, cpe:/a:redhat:rhel_eus:9.2::crb, cpe:/o:redhat:rhel_eus:9.2::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9.2 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: affected
versions:
version: 0:5.14.0-284.52.1.rt14.337.el9_2, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:rhel_eus:9.2::nfv, cpe:/a:redhat:rhel_eus:9.2::realtime]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9.2 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
defaultStatus: unaffected
packageName: kpatch-patch
cpe: cpe:/o:redhat:rhel_eus:9.2::baseos
}
{
vendor: Red Hat
product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-372.91.1.el8_6, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:enterprise_linux:8::hypervisor, cpe:/o:redhat:rhel_eus:8.6::baseos, cpe:/a:redhat:rhel_eus:8.6::crb]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 6
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: unaffected
cpes: cpe:/o:redhat:enterprise_linux:6
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 7
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: unaffected
cpes: cpe:/o:redhat:enterprise_linux:7
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 7
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: unaffected
cpes: cpe:/o:redhat:enterprise_linux:7
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: affected
cpes: cpe:/o:redhat:enterprise_linux:9
}
{
product: Fedora
vendor: Fedora
collectionURL: https://packages.fedoraproject.org/
packageName: kernel
defaultStatus: affected
}
metrics:
other: [
content: {'value': 'Important', 'namespace': 'https://access.redhat.com/security/updates/classification/'}
type: Red Hat severity rating
]
workarounds: To mitigate this issue, prevent module tls from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.