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Fencer Vulns
high 8.8

CVE-2024-25744 json

In the Linux kernel before 6.6.7, an untrusted VMM can trigger int80 syscall handling at any given point.

published 2024-02-12 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-23052

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

In the Linux kernel before 6.6.7, an untrusted VMM can trigger int80 syscall handling at any given point. This is related to arch/x86/coco/tdx/tdx.c and arch/x86/mm/mem_encrypt_amd.c.

Patch / fix

  • linux linux_kernel 6.6.7
  • linux Debian 12 6.1.69-1
  • linux Debian 14, Debian 13 6.6.8-1

debian advisories DEBIAN-CVE-2024-25744

  • linux Ubuntu 22.04 LTS 5.15.0-125.135
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1072.78
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1071.79
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1069.75
  • linux-ibm Ubuntu 22.04 LTS 5.15.0-1065.68
  • linux-kvm Ubuntu 22.04 LTS 5.15.0-1069.74
  • linux-azure Ubuntu 22.04 LTS 5.15.0-1075.84
  • linux-gkeop Ubuntu 22.04 LTS 5.15.0-1055.62

ubuntu advisories UBUNTU-CVE-2024-25744

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-kvm RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-core RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-modules RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-debug-kvm RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-debug-core RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-debug-modules RHEL 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel-rt-modules-extra RHEL 8 4.18.0-553.5.1.rt7.346.el8_10

red hat advisories RHSA-2024:3627RHSA-2024:3618RHSA-2024:2394RHSA-2024:2845RHSA-2024:2846RHSA-2024:2621

  • kernel-rt SLE Micro 5.5, Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.38.1
  • kernel-syms-rt Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.38.1
  • kernel-rt_debug Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.38.1
  • kernel-source-rt SLE Micro 5.5, Real Time Module 15 SP5, openSUSE Leap 15.5 5.14.21-150500.13.38.1
  • dtb-aarch64 openSUSE Leap 15.5 5.14.21-150500.55.52.1
  • kernel-64kb SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.52.1
  • kernel-syms SLE Module for Development Tools 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.52.1
  • kernel-obs-qa openSUSE Leap 15.5 5.14.21-150500.55.52.1

suse advisories SUSE-SU-2024:0910-1SUSE-SU-2024:0858-1SUSE-SU-2024:0855-1

  • kernel AlmaLinux 8 4.18.0-553.5.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.5.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.5.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.5.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.5.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.5.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.5.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.5.1.el8_10

almalinux advisories ALSA-2024:3618ALSA-2024:3627ALSA-2024:2394

  • kernel-rt Rocky Linux 8 4.18.0-553.5.1.rt7.346.el8_10
  • kernel Rocky Linux 8 4.18.0-553.5.1.el8_10

rocky linux advisories RLSA-2024:3627RLSA-2024:3618

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-25744 updated cvss 5.6

kernel: untrusted VMM can trigger int80 syscall handling

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: workaround, no fix planned “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.”
  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: workaround, no fix available “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.”
  • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-debuginfo-common-x86_64 4.18.0-477.55.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.55.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.55.1.el8_8
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2621
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.66.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.66.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.66.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.66.1.el9_2
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2845
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-427.13.1.el9_4, perf 5.14.0-427.13.1.el9_4, rtla 5.14.0-427.13.1.el9_4, kernel-devel-matched 5.14.0-427.13.1.el9_4, kernel-64k-devel-matched 5.14.0-427.13.1.el9_4, kernel-debug-devel-matched 5.14.0-427.13.1.el9_4, +6 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2394
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.66.1.el9_2, rtla 5.14.0-284.66.1.el9_2, kernel-devel-matched 5.14.0-284.66.1.el9_2, kernel-64k-devel-matched 5.14.0-284.66.1.el9_2, kernel-debug-devel-matched 5.14.0-284.66.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.66.1.el9_2, +5 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2845
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.5.1.el8_10, kernel 4.18.0-553.5.1.el8_10, bpftool 4.18.0-553.5.1.el8_10, kernel-core 4.18.0-553.5.1.el8_10, kernel-tools 4.18.0-553.5.1.el8_10, python3-perf 4.18.0-553.5.1.el8_10, +15 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:3618
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.3.0-427.13.1.el9_4, kernel 5.14.0-427.13.1.el9_4, kernel-64k 5.14.0-427.13.1.el9_4, kernel-core 5.14.0-427.13.1.el9_4, kernel-tools 5.14.0-427.13.1.el9_4, python3-perf 5.14.0-427.13.1.el9_4, +28 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2394
show 10 more
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) perf 4.18.0-477.55.1.el8_8, kernel 4.18.0-477.55.1.el8_8, bpftool 4.18.0-477.55.1.el8_8, kernel-core 4.18.0-477.55.1.el8_8, kernel-tools 4.18.0-477.55.1.el8_8, python3-perf 4.18.0-477.55.1.el8_8, +15 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2621
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.66.1.el9_2, kernel 5.14.0-284.66.1.el9_2, kernel-64k 5.14.0-284.66.1.el9_2, kernel-core 5.14.0-284.66.1.el9_2, kernel-tools 5.14.0-284.66.1.el9_2, python3-perf 5.14.0-284.66.1.el9_2, +28 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2845
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.5.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.5.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.5.1.el8_10
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:3618
  • Red Hat Enterprise Linux CRB (v. 9) libperf 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.13.1.el9_4
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2394
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-kvm 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-core 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-modules 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-kvm 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-core 4.18.0-553.5.1.rt7.346.el8_10, +4 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:3627
  • Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-kvm 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, +6 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2394
  • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-core 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-modules 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-debug-core 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-modules-core 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-debug-modules 5.14.0-284.66.1.rt14.351.el9_2, +4 more Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-kvm 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-core 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-modules 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-debug-kvm 5.14.0-284.66.1.rt14.351.el9_2, kernel-rt-debug-core 5.14.0-284.66.1.rt14.351.el9_2, +6 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2846
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-core 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-modules 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-core 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-modules 4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-modules-extra 4.18.0-553.5.1.rt7.346.el8_10, +2 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:3627
  • Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, kernel-rt-modules-core 5.14.0-427.13.1.el9_4, kernel-rt-debug-modules 5.14.0-427.13.1.el9_4, +4 more
    fixed: vendor fix “This vulnerability can be mitigated by disabling 32-bit emulation by default for TDX and SEV. The user can override it with the ia32_emulation=y command line option.” RHSA-2024:2394
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-doc 5.14.0-284.66.1.el9_2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Classification

Weakness
  • CWE-693 Protection Mechanism Failure
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.