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TI-2021-15463 Aliases CVE-2021-37576GHSA-w5r9-h86g-qp9x

arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform…

Priority LOW 35CWE-787Published · 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: 29 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e.

Why it matters now

EPSS 0.00575 47th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 14 advisoriesRed Hat: 29 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*3.10 to before 4.4.277; 4.5 to before 4.9.277; 4.10 to before 4.14.241; 4.15 to before 4.19.199; 4.20 to before 5.4.136; 5.5 to before 5.10.54; 5.11 to before 5.13.6VulnerableLinux
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.10 to before 4.4.277; 4.5 to before 4.9.277; 4.10 to before 4.14.241; 4.15 to before 4.19.199; 4.20 to before 5.4.136; 5.5 to before 5.10.54; 5.11 to before 5.13.6 Vulnerable ·Linux
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject

Remediation

Red Hat 14 advisories

  • RHSA-2021:4000 Released 2021-10-26 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server E4S (v. 7.7) kpatch-patch-3_10_0-1062_40_1-1-6.el7, kpatch-patch-3_10_0-1062_43_1-1-6.el7, kpatch-patch-3_10_0-1062_45_1-1-6.el7 +5
  • RHSA-2021:3987 Released 2021-10-26 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 7.7) bpftool-3.10.0-1062.59.1.el7, kernel-3.10.0-1062.59.1.el7, kernel-abi-whitelists-3.10.0-1062.59.1.el7 +8
    • Red Hat Enterprise Linux Server E4S (v. 7.7) bpftool-3.10.0-1062.59.1.el7, kernel-3.10.0-1062.59.1.el7, kernel-abi-whitelists-3.10.0-1062.59.1.el7 +9
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.59.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.7) kernel-debug-devel-3.10.0-1062.59.1.el7, kernel-tools-libs-devel-3.10.0-1062.59.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.59.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.7) bpftool-3.10.0-1062.59.1.el7, kernel-3.10.0-1062.59.1.el7, kernel-abi-whitelists-3.10.0-1062.59.1.el7 +8
  • RHSA-2021:3801 Released 2021-10-12 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1160.45.1.el7, kernel-3.10.0-1160.45.1.el7, kernel-abi-whitelists-3.10.0-1160.45.1.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.45.1.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.45.1.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1160.45.1.el7, kernel-3.10.0-1160.45.1.el7, kernel-abi-whitelists-3.10.0-1160.45.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1160.45.1.el7, kernel-tools-libs-devel-3.10.0-1160.45.1.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1160.45.1.el7, kernel-3.10.0-1160.45.1.el7, kernel-abi-whitelists-3.10.0-1160.45.1.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.45.1.el7
Show 11 more Red Hat advisories
  • RHSA-2021:3812 Released 2021-10-12 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.6) bpftool-3.10.0-957.84.1.el7, kernel-3.10.0-957.84.1.el7, kernel-abi-whitelists-3.10.0-957.84.1.el7 +8
    • Red Hat Enterprise Linux Server E4S (v. 7.6) kernel-3.10.0-957.84.1.el7, kernel-abi-whitelists-3.10.0-957.84.1.el7, kernel-bootwrapper-3.10.0-957.84.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.84.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.6) kernel-debug-devel-3.10.0-957.84.1.el7, kernel-tools-libs-devel-3.10.0-957.84.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.84.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.6) bpftool-3.10.0-957.84.1.el7, kernel-3.10.0-957.84.1.el7, kernel-abi-whitelists-3.10.0-957.84.1.el7 +8
  • RHSA-2021:3814 Released 2021-10-12 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server E4S (v. 7.6) kpatch-patch-3_10_0-957_61_1-1-6.el7, kpatch-patch-3_10_0-957_61_2-1-6.el7, kpatch-patch-3_10_0-957_62_1-1-6.el7 +7
  • RHSA-2021:3768 Released 2021-10-12 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server (v. 7) kpatch-patch-3_10_0-1160_11_1-1-9.el7, kpatch-patch-3_10_0-1160_15_2-1-9.el7, kpatch-patch-3_10_0-1160_21_1-1-7.el7 +9
  • RHSA-2021:3766 Released 2021-10-12 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.3) kernel-3.10.0-514.93.1.el7, kernel-abi-whitelists-3.10.0-514.93.1.el7, kernel-debug-3.10.0-514.93.1.el7 +7
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) kernel-tools-libs-devel-3.10.0-514.93.1.el7
  • RHSA-2021:3725 Released 2021-10-05 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) kernel-3.10.0-693.94.1.el7, kernel-abi-whitelists-3.10.0-693.94.1.el7, kernel-debug-3.10.0-693.94.1.el7 +7
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.94.1.el7
  • RHSA-2021:3447 Released 2021-09-07 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-305.17.1.el8_4
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-305.17.1.el8_4, kernel-4.18.0-305.17.1.el8_4, kernel-abi-stablelists-4.18.0-305.17.1.el8_4 +19
  • RHSA-2021:3446 Released 2021-09-07 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v. 8.2) kernel-tools-libs-devel-4.18.0-193.65.2.el8_2
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) bpftool-4.18.0-193.65.2.el8_2, kernel-4.18.0-193.65.2.el8_2, kernel-abi-whitelists-4.18.0-193.65.2.el8_2 +19
  • RHSA-2021:3444 Released 2021-09-07 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-tools-libs-devel-4.18.0-147.54.2.el8_1
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) bpftool-4.18.0-147.54.2.el8_1, kernel-4.18.0-147.54.2.el8_1, kernel-abi-whitelists-4.18.0-147.54.2.el8_1 +19
  • RHSA-2021:3443 Released 2021-09-07 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) kpatch-patch-4_18_0-193_19_1-1-12.el8_2, kpatch-patch-4_18_0-193_28_1-1-10.el8_2, kpatch-patch-4_18_0-193_29_1-1-10.el8_2 +9
  • RHSA-2021:3442 Released 2021-09-07 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kpatch-patch-4_18_0-147_27_1-1-13.el8_1, kpatch-patch-4_18_0-147_32_1-1-11.el8_1, kpatch-patch-4_18_0-147_34_1-1-11.el8_1 +7
  • RHSA-2021:3436 Released 2021-09-07 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-305-1-5.el8, kpatch-patch-4_18_0-305_10_2-1-2.el8_4, kpatch-patch-4_18_0-305_12_1-1-1.el8_4 +2

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2021:3447
Red Hat CodeReady Linux Builder EUS (v. 8.1)Fixed RHSA-2021:3444
Red Hat CodeReady Linux Builder EUS (v. 8.2)Fixed RHSA-2021:3446
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2021:3436, RHSA-2021:3447
Red Hat Enterprise Linux BaseOS EUS (v. 8.1)Fixed RHSA-2021:3442, RHSA-2021:3444
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2021:3443, RHSA-2021:3446
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2021:3801
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:3801
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2021:3801
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:3768, RHSA-2021:3801
Red Hat Enterprise Linux Server AUS (v. 7.3)Fixed RHSA-2021:3766
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2021:3725
Red Hat Enterprise Linux Server AUS (v. 7.6)Fixed RHSA-2021:3812
Red Hat Enterprise Linux Server AUS (v. 7.7)Fixed RHSA-2021:3987
Red Hat Enterprise Linux Server E4S (v. 7.6)Fixed RHSA-2021:3812, RHSA-2021:3814
Red Hat Enterprise Linux Server E4S (v. 7.7)Fixed RHSA-2021:3987, RHSA-2021:4000
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2021:3801
Red Hat Enterprise Linux Server Optional AUS (v. 7.3)Fixed RHSA-2021:3766
Red Hat Enterprise Linux Server Optional AUS (v. 7.4)Fixed RHSA-2021:3725
Red Hat Enterprise Linux Server Optional AUS (v. 7.6)Fixed RHSA-2021:3812
Red Hat Enterprise Linux Server Optional AUS (v. 7.7)Fixed RHSA-2021:3987
Red Hat Enterprise Linux Server Optional E4S (v. 7.6)Fixed RHSA-2021:3812
Red Hat Enterprise Linux Server Optional E4S (v. 7.7)Fixed RHSA-2021:3987
Red Hat Enterprise Linux Server Optional TUS (v. 7.6)Fixed RHSA-2021:3812
Red Hat Enterprise Linux Server Optional TUS (v. 7.7)Fixed RHSA-2021:3987
Red Hat Enterprise Linux Server TUS (v. 7.6)Fixed RHSA-2021:3812
Red Hat Enterprise Linux Server TUS (v. 7.7)Fixed RHSA-2021:3987
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:3801
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2021:3801
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-37576
  2. 2026-10-03 Alias added: GHSA-w5r9-h86g-qp9x

References

Exploit 1

Patch 1

Advisory 4

Other 1

Sources

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