Read the docs
TI-2024-23659 Aliases CVE-2024-35791GHSA-wm4c-jgh8-m62g

KVM: SVM: Flush pages under kvm->lock to fix UAF in svm_register_enc_region()

Priority LOW 34CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 10 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Flush pages under kvm->lock to fix UAF in svm_register_enc_region() Do the cache flush of converted pages in svm_register_enc_region() before dropping kvm->lock to fix use-after-free issues where region and/or its array of pages could be freed by a different task, e.g. if userspace has __unregister_enc_region_locked() already queued up for the region. Note, the "obvious" alternative of using local variables doesn't fully resolve the bug, as region->pages is also dynamically allocated. I.e. the region structure itself would be fine, but region->pages could be freed. Flushing multiple pages under kvm->lock is unfortunate, but the entire flow is a rare slow path, and the manual flush is only needed on CPUs that lack coherency for encrypted memory.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00238 14th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.215, 4.20, 5.5 +5Red Hat: 3 advisoriesRed Hat: 10 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.10.15 to before 5.10.215; 4.19.176 to before 4.20; 5.4.98 to before 5.55.10.215, 4.20, 5.5Patch availableCNA
LinuxLinux5.11 and later5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8Patch availableCNA
  • Linux VendorLinux Affected 5.10.15 to before 5.10.215; 4.19.176 to before 4.20; 5.4.98 to before 5.5 Fixed in 5.10.215, 4.20, 5.5 Patch available CNA
  • Linux VendorLinux Affected 5.11 and later Fixed in 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8 Patch available CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.19.176 to before 4.20; 5.4.98 to before 5.5; 5.10.15 to before 5.10.215; 5.11.1 to before 5.15.154; 5.16 to before 6.1.84; 6.2 to before 6.6.24; 6.7 to before 6.7.12VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.11:-:*:*:*:*:*:*5.11VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.11:rc7:*:*:*:*:*:*5.11 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*6.8 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*6.8 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*6.8 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*6.8 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*6.8 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:*6.8 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc7:*:*:*:*:*:*6.8 rc7VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.176 to before 4.20; 5.4.98 to before 5.5; 5.10.15 to before 5.10.215; 5.11.1 to before 5.15.154; 5.16 to before 6.1.84; 6.2 to before 6.6.24; 6.7 to before 6.7.12 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.11:-:*:*:*:*:*:* Versions 5.11 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.11:rc7:*:*:*:*:*:* Versions 5.11 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* Versions 6.8 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* Versions 6.8 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* Versions 6.8 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* Versions 6.8 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:* Versions 6.8 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:* Versions 6.8 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc7:*:*:*:*:*:* Versions 6.8 rc7 Vulnerable ·Linux
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.215, 4.20, 5.5
  • Fix · CNA Linux (Linux) Fixed in 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8

Red Hat 3 advisories

  • RHSA-2024:6567 Released 2024-09-11 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.35.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.35.1.el9_4, kernel-64k-devel-5.14.0-427.35.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.35.1.el9_4, kernel-5.14.0-427.35.1.el9_4, kernel-64k-5.14.0-427.35.1.el9_4 +29
    • Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.35.1.el9_4, libperf-5.14.0-427.35.1.el9_4
    • Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.35.1.el9_4, kernel-rt-core-5.14.0-427.35.1.el9_4, kernel-rt-debug-5.14.0-427.35.1.el9_4 +11
    • Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.35.1.el9_4, kernel-rt-core-5.14.0-427.35.1.el9_4, kernel-rt-debug-5.14.0-427.35.1.el9_4 +9
  • RHSA-2024:4831 Released 2024-07-24 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.75.1.rt14.360.el9_2, kernel-rt-core-5.14.0-284.75.1.rt14.360.el9_2, kernel-rt-debug-5.14.0-284.75.1.rt14.360.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.75.1.rt14.360.el9_2, kernel-rt-core-5.14.0-284.75.1.rt14.360.el9_2, kernel-rt-debug-5.14.0-284.75.1.rt14.360.el9_2 +11
  • RHSA-2024:4823 Released 2024-07-24 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.75.1.el9_2
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.75.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.75.1.el9_2, kernel-64k-devel-5.14.0-284.75.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.75.1.el9_2, kernel-5.14.0-284.75.1.el9_2, kernel-64k-5.14.0-284.75.1.el9_2 +29

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 8AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2024:4823
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:6567
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:4823
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:6567
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2024:4823
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:6567
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2024:6567
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2024:6567
Red Hat Enterprise Linux Real Time EUS (v.9.2)Fixed RHSA-2024:4831
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2)Fixed RHSA-2024:4831
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux AppStream EUS (v.9.2)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-35791
  2. 2026-10-03 Alias added: GHSA-wm4c-jgh8-m62g

References

Patch 6

Advisory 1

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences