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TI-2021-08859 Aliases CVE-2021-27364GHSA-qh7p-rxx9-vwx2

An issue was discovered in the Linux kernel through 5.11.3.

Priority LOW 33CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Fixed

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

Summary

An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages.

Why it matters now

EPSS 0.00965 61st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 19 advisories

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 · 10

CPEVersionsRoleVendor
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 4.4.260; 4.5 to before 4.9.260; 4.10 to before 4.14.224; 4.15 to before 4.19.179; 4.20 to before 5.4.103; 5.5 to before 5.10.21; 5.11 to before 5.11.4VulnerableLinux
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:*not specified by NVDRunning onNetApp
cpe:2.3:a:oracle:tekelec_platform_distribution:*:*:*:*:*:*:*:*7.4.0 – 7.7.1VulnerableOracle
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*20.04VulnerableCanonical
  • cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.4.260; 4.5 to before 4.9.260; 4.10 to before 4.14.224; 4.15 to before 4.19.179; 4.20 to before 5.4.103; 5.5 to before 5.10.21; 5.11 to before 5.11.4 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
  • cpe:2.3:a:oracle:tekelec_platform_distribution:*:*:*:*:*:*:*:* Versions 7.4.0 – 7.7.1 Vulnerable ·Oracle
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical

Remediation

Red Hat 19 advisories

  • RHSA-2021:1531 Released 2021-05-11 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) bpftool-3.10.0-1062.49.1.el7, kernel-3.10.0-1062.49.1.el7, kernel-abi-whitelists-3.10.0-1062.49.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.49.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.7) bpftool-3.10.0-1062.49.1.el7, kernel-3.10.0-1062.49.1.el7, kernel-abi-whitelists-3.10.0-1062.49.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) kernel-debug-devel-3.10.0-1062.49.1.el7, kernel-tools-libs-devel-3.10.0-1062.49.1.el7
  • RHSA-2021:1532 Released 2021-05-11 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server EUS (v. 7.7) kpatch-patch-3_10_0-1062_26_1-1-3.el7, kpatch-patch-3_10_0-1062_30_1-1-3.el7, kpatch-patch-3_10_0-1062_31_2-1-3.el7 +8
  • RHSA-2021:1376 Released 2021-04-27 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) bpftool-3.10.0-957.72.1.el7, kernel-3.10.0-957.72.1.el7, kernel-abi-whitelists-3.10.0-957.72.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.72.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.6) bpftool-3.10.0-957.72.1.el7, kernel-3.10.0-957.72.1.el7, kernel-abi-whitelists-3.10.0-957.72.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) kernel-debug-devel-3.10.0-957.72.1.el7, kernel-tools-libs-devel-3.10.0-957.72.1.el7
    • Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUS kernel-devel-3.10.0-957.72.1.el7, perf-3.10.0-957.72.1.el7, python-perf-3.10.0-957.72.1.el7
Show 16 more Red Hat advisories
  • RHSA-2021:1377 Released 2021-04-27 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server EUS (v. 7.6) kpatch-patch-3_10_0-957_54_1-1-3.el7, kpatch-patch-3_10_0-957_56_1-1-3.el7, kpatch-patch-3_10_0-957_58_2-1-3.el7 +6
  • RHSA-2021:1379 Released 2021-04-27 · Red Hat rating Important
    kernel-alt security and bug fix update
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-4.14.0-115.36.1.el7a, kernel-alt-4.14.0-115.36.1.el7a, kernel-bootwrapper-4.14.0-115.36.1.el7a +6
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debug-devel-4.14.0-115.36.1.el7a, kernel-tools-libs-devel-4.14.0-115.36.1.el7a
  • RHSA-2021:1373 Released 2021-04-27 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 7.3) kernel-3.10.0-514.88.1.el7, kernel-abi-whitelists-3.10.0-514.88.1.el7, kernel-debug-3.10.0-514.88.1.el7 +7
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) kernel-tools-libs-devel-3.10.0-514.88.1.el7
  • RHSA-2021:1295 Released 2021-04-20 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) kpatch-patch-4_18_0-193-1-13.el8, kpatch-patch-4_18_0-193_13_2-1-8.el8_2, kpatch-patch-4_18_0-193_14_3-1-8.el8_2 +10
  • RHSA-2021:1289 Released 2021-04-20 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 7.2) kernel-3.10.0-327.96.1.el7, kernel-abi-whitelists-3.10.0-327.96.1.el7, kernel-debug-3.10.0-327.96.1.el7 +7
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) kernel-tools-libs-devel-3.10.0-327.96.1.el7
  • RHSA-2021:1288 Released 2021-04-20 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server (v. 6 ELS) kernel-2.6.32-754.39.1.el6, kernel-abi-whitelists-2.6.32-754.39.1.el6, kernel-debug-2.6.32-754.39.1.el6 +7
    • Red Hat Enterprise Linux Server Optional (v. 6 ELS) python-perf-2.6.32-754.39.1.el6
  • RHSA-2021:1272 Released 2021-04-20 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v. 8.2) kernel-tools-libs-devel-4.18.0-193.51.1.el8_2
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) bpftool-4.18.0-193.51.1.el8_2, kernel-4.18.0-193.51.1.el8_2, kernel-abi-whitelists-4.18.0-193.51.1.el8_2 +19
  • RHSA-2021:1279 Released 2021-04-20 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time EUS (v. 8.2) kernel-rt-4.18.0-193.51.1.rt13.101.el8_2, kernel-rt-core-4.18.0-193.51.1.rt13.101.el8_2, kernel-rt-debug-4.18.0-193.51.1.rt13.101.el8_2 +7
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) kernel-rt-4.18.0-193.51.1.rt13.101.el8_2, kernel-rt-core-4.18.0-193.51.1.rt13.101.el8_2, kernel-rt-debug-4.18.0-193.51.1.rt13.101.el8_2 +9
  • RHSA-2021:1267 Released 2021-04-20 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) kernel-3.10.0-693.84.1.el7, kernel-abi-whitelists-3.10.0-693.84.1.el7, kernel-debug-3.10.0-693.84.1.el7 +7
    • Red Hat Enterprise Linux Server E4S (v. 7.4) kernel-3.10.0-693.84.1.el7, kernel-abi-whitelists-3.10.0-693.84.1.el7, kernel-bootwrapper-3.10.0-693.84.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.84.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debug-devel-3.10.0-693.84.1.el7, kernel-tools-libs-devel-3.10.0-693.84.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.84.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.4) kernel-3.10.0-693.84.1.el7, kernel-abi-whitelists-3.10.0-693.84.1.el7, kernel-debug-3.10.0-693.84.1.el7 +7
  • RHSA-2021:1171 Released 2021-04-13 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-tools-libs-devel-4.18.0-147.44.1.el8_1
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) bpftool-4.18.0-147.44.1.el8_1, kernel-4.18.0-147.44.1.el8_1, kernel-abi-whitelists-4.18.0-147.44.1.el8_1 +19
  • RHSA-2021:1173 Released 2021-04-13 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kpatch-patch-4_18_0-147_13_2-1-9.el8_1, kpatch-patch-4_18_0-147_20_1-1-8.el8_1, kpatch-patch-4_18_0-147_24_2-1-6.el8_1 +5
  • RHSA-2021:1071 Released 2021-04-08 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1160.24.1.el7, kernel-3.10.0-1160.24.1.el7, kernel-abi-whitelists-3.10.0-1160.24.1.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.24.1.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.24.1.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1160.24.1.el7, kernel-3.10.0-1160.24.1.el7, kernel-abi-whitelists-3.10.0-1160.24.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1160.24.1.el7, kernel-tools-libs-devel-3.10.0-1160.24.1.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1160.24.1.el7, kernel-3.10.0-1160.24.1.el7, kernel-abi-whitelists-3.10.0-1160.24.1.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.24.1.el7
  • RHSA-2021:1093 Released 2021-04-06 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-240.22.1.el8_3
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-240.22.1.el8_3, kernel-4.18.0-240.22.1.el8_3, kernel-abi-whitelists-4.18.0-240.22.1.el8_3 +19
  • RHSA-2021:1081 Released 2021-04-06 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-core-4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-debug-4.18.0-240.22.1.rt7.77.el8_3 +7
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-core-4.18.0-240.22.1.rt7.77.el8_3, kernel-rt-debug-4.18.0-240.22.1.rt7.77.el8_3 +9
  • RHSA-2021:1069 Released 2021-04-06 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server (v. 7) kpatch-patch-3_10_0-1160-1-5.el7, kpatch-patch-3_10_0-1160_11_1-1-4.el7, kpatch-patch-3_10_0-1160_15_2-1-4.el7 +4
  • RHSA-2021:1070 Released 2021-04-06 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1160.24.1.rt56.1161.el7, kernel-rt-debug-3.10.0-1160.24.1.rt56.1161.el7, kernel-rt-debug-devel-3.10.0-1160.24.1.rt56.1161.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1160.24.1.rt56.1161.el7, kernel-rt-debug-3.10.0-1160.24.1.rt56.1161.el7, kernel-rt-debug-devel-3.10.0-1160.24.1.rt56.1161.el7 +7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2021:1093
Red Hat CodeReady Linux Builder EUS (v. 8.1)Fixed RHSA-2021:1171
Red Hat CodeReady Linux Builder EUS (v. 8.2)Fixed RHSA-2021:1272
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2021:1093
Red Hat Enterprise Linux BaseOS EUS (v. 8.1)Fixed RHSA-2021:1171, RHSA-2021:1173
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2021:1272, RHSA-2021:1295
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2021:1071
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:1071
Red Hat Enterprise Linux ComputeNode EUS (v. 7.6)Fixed RHSA-2021:1376
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)Fixed RHSA-2021:1531
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2021:1071
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6)Fixed RHSA-2021:1376
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)Fixed RHSA-2021:1531
Red Hat Enterprise Linux Real Time (v. 8)Fixed RHSA-2021:1081
Red Hat Enterprise Linux Real Time EUS (v. 8.2)Fixed RHSA-2021:1279
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2021:1081
Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)Fixed RHSA-2021:1279
Red Hat Enterprise Linux Server (v. 6 ELS)Fixed RHSA-2021:1288
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:1069, RHSA-2021:1071
Red Hat Enterprise Linux Server AUS (v. 7.2)Fixed RHSA-2021:1289
Red Hat Enterprise Linux Server AUS (v. 7.3)Fixed RHSA-2021:1373
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2021:1267
Red Hat Enterprise Linux Server E4S (v. 7.4)Fixed RHSA-2021:1267
Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2021:1376, RHSA-2021:1377
Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2021:1531, RHSA-2021:1532
Red Hat Enterprise Linux Server Optional (v. 6 ELS)Fixed RHSA-2021:1288
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2021:1071
Red Hat Enterprise Linux Server Optional AUS (v. 7.2)Fixed RHSA-2021:1289
Red Hat Enterprise Linux Server Optional AUS (v. 7.3)Fixed RHSA-2021:1373
Red Hat Enterprise Linux Server Optional AUS (v. 7.4)Fixed RHSA-2021:1267
Red Hat Enterprise Linux Server Optional E4S (v. 7.4)Fixed RHSA-2021:1267
Red Hat Enterprise Linux Server Optional EUS (v. 7.6)Fixed RHSA-2021:1376
Red Hat Enterprise Linux Server Optional EUS (v. 7.7)Fixed RHSA-2021:1531
Red Hat Enterprise Linux Server Optional TUS (v. 7.4)Fixed RHSA-2021:1267
Red Hat Enterprise Linux Server TUS (v. 7.4)Fixed RHSA-2021:1267
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:1071
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2021:1071
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2021:1379
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2021:1379
Red Hat Enterprise Linux for Real Time (v. 7)Fixed RHSA-2021:1070
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2021:1070
Red Hat Virtualization 4.2 Hypervisor for RHEL 7.6 EUSFixed RHSA-2021:1376
Not affected: 2 products
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-27364
  2. 2026-10-03 Alias added: GHSA-qh7p-rxx9-vwx2

References

Exploit 1

Patch 2

Advisory 6

Sources

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