--- id: CVE-2024-0646 title: >- 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 summary: >- 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 … severity: high cvss: 7 cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-787 - CWE-787 vendor: linux product: linux_kernel affected: - 'linux_kernel >= 4.20, < 5.4.267' - 'linux_kernel >= 5.5, < 5.10.208' - 'linux_kernel >= 5.11, < 5.15.147' - 'linux_kernel >= 5.16, < 6.1.69' - 'linux_kernel >= 6.2, < 6.6.7' - linux_kernel = 6.7 - enterprise_linux = 8.0 - enterprise_linux = 9.0 patched: - linux_kernel 6.6.7 published: '2024-01-17' updated: '2026-08-06' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-0646' references: - url: 'https://access.redhat.com/errata/RHSA-2024:0723' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:0724' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:0725' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:0850' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:0851' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:0876' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:0881' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:0897' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1248' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1250' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1251' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1253' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1268' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1269' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1278' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1306' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1367' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1368' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1377' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1382' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:1404' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:2094' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2024-0646' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2253908' label: secalert@redhat.com - url: >- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c5a595000e267 label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2024:0723' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:0724' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:0725' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:0850' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:0851' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:0876' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:0881' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:0897' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1248' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1250' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1251' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1253' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1268' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1269' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1278' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1306' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1367' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1368' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1377' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1382' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:1404' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2024:2094' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/security/cve/CVE-2024-0646' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2253908' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c5a595000e267 label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html' label: af854a3a-2127-422b-91ae-364da2661108 tags: - nvd epss: 0.00308 epssPercentile: 0.23834 ingestedAt: '2026-08-06T23:06:28.962Z' --- ## Overview 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 - `linux_kernel >= 4.20, < 5.4.267` - `linux_kernel >= 5.5, < 5.10.208` - `linux_kernel >= 5.11, < 5.15.147` - `linux_kernel >= 5.16, < 6.1.69` - `linux_kernel >= 6.2, < 6.6.7` - `linux_kernel = 6.7` - `enterprise_linux = 8.0` - `enterprise_linux = 9.0` ## Remediation Upgrade past the affected range: - `linux_kernel 6.6.7`