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TI-2023-01540 Aliases CVE-2023-1637GHSA-3hpj-266f-m43f

A flaw that boot CPU could be vulnerable for the speculative execution behavior kind of…

Priority MEDIUM 58CWE-226Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 17 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

A flaw that boot CPU could be vulnerable for the speculative execution behavior kind of attacks in the Linux kernel X86 CPU Power management options functionality was found in the way user resuming CPU from suspend-to-RAM. A local user could use this flaw to potentially get unauthorized access to some memory of the CPU similar to the speculative execution behavior kind of attacks.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0022 12th percentileScored 2026-11-07
Fix Partial Red Hat: 7 advisoriesRed Hat: 17 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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
—KernelLinux kernel 5.18-rc2—No fix listedCNA
  • Kernel Vendor— Affected Linux kernel 5.18-rc2 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:5.18:rc2:*:*:*:*:*:*5.18 rc2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:5.18:rc2:*:*:*:*:*:* Versions 5.18 rc2 Vulnerable ·Linux

Remediation

Red Hat 7 advisories

  • RHSA-2023:5794 Released 2023-10-17 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV TUS (v.8.4) kernel-rt-4.18.0-305.108.1.rt7.183.el8_4, kernel-rt-core-4.18.0-305.108.1.rt7.183.el8_4, kernel-rt-debug-4.18.0-305.108.1.rt7.183.el8_4 +9
    • Red Hat Enterprise Linux RT TUS (v.8.4) kernel-rt-4.18.0-305.108.1.rt7.183.el8_4, kernel-rt-core-4.18.0-305.108.1.rt7.183.el8_4, kernel-rt-debug-4.18.0-305.108.1.rt7.183.el8_4 +7
  • RHSA-2023:5628 Released 2023-10-10 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.108.1.el8_4, kernel-4.18.0-305.108.1.el8_4, kernel-abi-stablelists-4.18.0-305.108.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.4) bpftool-4.18.0-305.108.1.el8_4, kernel-4.18.0-305.108.1.el8_4, kernel-abi-stablelists-4.18.0-305.108.1.el8_4 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.4) bpftool-4.18.0-305.108.1.el8_4, kernel-4.18.0-305.108.1.el8_4, kernel-abi-stablelists-4.18.0-305.108.1.el8_4 +14
  • RHSA-2023:5244 Released 2023-09-19 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-477.27.1.el8_8, kernel-4.18.0-477.27.1.el8_8, kernel-abi-stablelists-4.18.0-477.27.1.el8_8 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-477.27.1.el8_8
Show 4 more Red Hat advisories
  • RHSA-2023:5255 Released 2023-09-19 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-477.27.1.rt7.290.el8_8, kernel-rt-core-4.18.0-477.27.1.rt7.290.el8_8, kernel-rt-debug-4.18.0-477.27.1.rt7.290.el8_8 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-477.27.1.rt7.290.el8_8, kernel-rt-core-4.18.0-477.27.1.rt7.290.el8_8, kernel-rt-debug-4.18.0-477.27.1.rt7.290.el8_8 +7
  • RHSA-2023:5069 Released 2023-09-12 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-284.30.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.30.1.el9_2, kernel-64k-devel-5.14.0-284.30.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.0.0-284.30.1.el9_2, kernel-5.14.0-284.30.1.el9_2, kernel-64k-5.14.0-284.30.1.el9_2 +29
    • Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-284.30.1.el9_2
  • RHSA-2023:5091 Released 2023-09-12 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-284.30.1.rt14.315.el9_2, kernel-rt-core-5.14.0-284.30.1.rt14.315.el9_2, kernel-rt-debug-5.14.0-284.30.1.rt14.315.el9_2 +11
    • Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-284.30.1.rt14.315.el9_2, kernel-rt-core-5.14.0-284.30.1.rt14.315.el9_2, kernel-rt-debug-5.14.0-284.30.1.rt14.315.el9_2 +9
  • RHSA-2023:4789 Released 2023-08-29 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-tools-libs-devel-4.18.0-372.70.1.el8_6
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) bpftool-4.18.0-372.70.1.el8_6, kernel-4.18.0-372.70.1.el8_6, kernel-abi-stablelists-4.18.0-372.70.1.el8_6 +19
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 kernel-devel-4.18.0-372.70.1.el8_6, perf-4.18.0-372.70.1.el8_6

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat CodeReady Linux Builder EUS (v.8.6)Fixed RHSA-2023:4789
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:5069
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2023:5244
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2023:5069
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2023:5628
Red Hat Enterprise Linux BaseOS E4S (v.8.4)Fixed RHSA-2023:5628
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2023:4789
Red Hat Enterprise Linux BaseOS TUS (v.8.4)Fixed RHSA-2023:5628
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2023:5244
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2023:5069
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2023:5255
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2023:5091
Red Hat Enterprise Linux NFV TUS (v.8.4)Fixed RHSA-2023:5794
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2023:5255
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2023:5091
Red Hat Enterprise Linux RT TUS (v.8.4)Fixed RHSA-2023:5794
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2023:4789
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux AppStream (v. 9)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-1637
  2. 2026-10-03 Alias added: GHSA-3hpj-266f-m43f

References

Patch 1

Other 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