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TI-2021-03026 Aliases CVE-2021-4155

A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed…

Priority LOW 25CWE-131Published · 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
Fixed

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

Summary

A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.

Why it matters now

EPSS 0.00302 23rd percentileScored 2026-11-07
Fix Fixed Red Hat: 24 advisories

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
—kernelFixed in Kernel v5.16—No fix listedCNA
  • kernel Vendor— Affected Fixed in Kernel v5.16 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 5.16VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 5.16 Vulnerable ·Linux

Remediation

Red Hat 24 advisories

  • RHSA-2022:1417 Released 2022-04-19 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server (v. 6 ELS) kernel-2.6.32-754.47.1.el6, kernel-abi-whitelists-2.6.32-754.47.1.el6, kernel-debug-2.6.32-754.47.1.el6 +7
    • Red Hat Enterprise Linux Server Optional (v. 6 ELS) python-perf-2.6.32-754.47.1.el6
  • RHSA-2022:1263 Released 2022-04-07 · Red Hat rating Important
    RHV-H security update (redhat-virtualization-host) 4.3.22
    • RHEL 7-based RHEV-H for RHEV 4 (build requirements) redhat-virtualization-host-4.3.22-20220330.1.el7_9, redhat-virtualization-host-image-update-4.3.22-20220330.1.el7_9
    • Red Hat Virtualization 4 Hypervisor for RHEL 7 redhat-virtualization-host-4.3.22-20220330.1.el7_9, redhat-virtualization-host-image-update-4.3.22-20220330.1.el7_9
  • RHSA-2022:0958 Released 2022-03-17 · Red Hat rating Important
    kpatch-patch-4_18_0-147_58_1 security and bug fix update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) kpatch-patch-4_18_0-147_58_1-1-1.el8_1
Show 21 more Red Hat advisories
  • RHSA-2022:0718 Released 2022-03-01 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server E4S (v. 7.7) kpatch-patch-3_10_0-1062_46_1-1-7.el7, kpatch-patch-3_10_0-1062_49_1-1-5.el7, kpatch-patch-3_10_0-1062_51_1-1-5.el7 +5
  • RHSA-2022:0712 Released 2022-03-01 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.7) bpftool-3.10.0-1062.63.1.el7, kernel-3.10.0-1062.63.1.el7, kernel-abi-whitelists-3.10.0-1062.63.1.el7 +8
    • Red Hat Enterprise Linux Server E4S (v. 7.7) bpftool-3.10.0-1062.63.1.el7, kernel-3.10.0-1062.63.1.el7, kernel-abi-whitelists-3.10.0-1062.63.1.el7 +9
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.63.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.7) kernel-debug-devel-3.10.0-1062.63.1.el7, kernel-tools-libs-devel-3.10.0-1062.63.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.63.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.7) bpftool-3.10.0-1062.63.1.el7, kernel-3.10.0-1062.63.1.el7, kernel-abi-whitelists-3.10.0-1062.63.1.el7 +8
  • RHSA-2022:0620 Released 2022-02-22 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1160.59.1.el7, kernel-3.10.0-1160.59.1.el7, kernel-abi-whitelists-3.10.0-1160.59.1.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.59.1.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.59.1.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1160.59.1.el7, kernel-3.10.0-1160.59.1.el7, kernel-abi-whitelists-3.10.0-1160.59.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1160.59.1.el7, kernel-tools-libs-devel-3.10.0-1160.59.1.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1160.59.1.el7, kernel-3.10.0-1160.59.1.el7, kernel-abi-whitelists-3.10.0-1160.59.1.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.59.1.el7
  • RHSA-2022:0622 Released 2022-02-22 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1160.59.1.rt56.1200.el7, kernel-rt-debug-3.10.0-1160.59.1.rt56.1200.el7, kernel-rt-debug-devel-3.10.0-1160.59.1.rt56.1200.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1160.59.1.rt56.1200.el7, kernel-rt-debug-3.10.0-1160.59.1.rt56.1200.el7, kernel-rt-debug-devel-3.10.0-1160.59.1.rt56.1200.el7 +7
  • RHSA-2022:0636 Released 2022-02-22 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v. 8.2) kernel-tools-libs-devel-4.18.0-193.75.1.el8_2
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) bpftool-4.18.0-193.75.1.el8_2, kernel-4.18.0-193.75.1.el8_2, kernel-abi-whitelists-4.18.0-193.75.1.el8_2 +19
  • RHSA-2022:0629 Released 2022-02-22 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time EUS (v. 8.2) kernel-rt-4.18.0-193.75.1.rt13.125.el8_2, kernel-rt-core-4.18.0-193.75.1.rt13.125.el8_2, kernel-rt-debug-4.18.0-193.75.1.rt13.125.el8_2 +7
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) kernel-rt-4.18.0-193.75.1.rt13.125.el8_2, kernel-rt-core-4.18.0-193.75.1.rt13.125.el8_2, kernel-rt-debug-4.18.0-193.75.1.rt13.125.el8_2 +9
  • RHSA-2022:0592 Released 2022-02-22 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server (v. 7) kpatch-patch-3_10_0-1160_21_1-1-9.el7, kpatch-patch-3_10_0-1160_24_1-1-7.el7, kpatch-patch-3_10_0-1160_25_1-1-7.el7 +7
  • RHSA-2022:0590 Released 2022-02-22 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) kpatch-patch-4_18_0-193_46_1-1-9.el8_2, kpatch-patch-4_18_0-193_47_1-1-9.el8_2, kpatch-patch-4_18_0-193_51_1-1-6.el8_2 +7
  • RHSA-2022:0540 Released 2022-02-15 · Red Hat rating Important
    Red Hat Virtualization Host security update [ovirt-4.4.10-1]
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host-4.4.10-202202081536_8.5, redhat-virtualization-host-image-update-4.4.10-202202081536_8.5
  • RHSA-2022:0531 Released 2022-02-15 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.6) bpftool-3.10.0-957.88.1.el7, kernel-3.10.0-957.88.1.el7, kernel-abi-whitelists-3.10.0-957.88.1.el7 +8
    • Red Hat Enterprise Linux Server E4S (v. 7.6) kernel-3.10.0-957.88.1.el7, kernel-abi-whitelists-3.10.0-957.88.1.el7, kernel-bootwrapper-3.10.0-957.88.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.88.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.6) kernel-debug-devel-3.10.0-957.88.1.el7, kernel-tools-libs-devel-3.10.0-957.88.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.88.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.6) bpftool-3.10.0-957.88.1.el7, kernel-3.10.0-957.88.1.el7, kernel-abi-whitelists-3.10.0-957.88.1.el7 +8
  • RHSA-2022:0533 Released 2022-02-15 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server E4S (v. 7.6) kpatch-patch-3_10_0-957_70_1-1-7.el7, kpatch-patch-3_10_0-957_72_1-1-5.el7, kpatch-patch-3_10_0-957_76_1-1-5.el7 +4
  • RHSA-2022:0530 Released 2022-02-15 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) kernel-3.10.0-693.96.1.el7, kernel-abi-whitelists-3.10.0-693.96.1.el7, kernel-debug-3.10.0-693.96.1.el7 +7
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.96.1.el7
  • RHSA-2022:0529 Released 2022-02-15 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.3) kernel-3.10.0-514.97.1.el7, kernel-abi-whitelists-3.10.0-514.97.1.el7, kernel-debug-3.10.0-514.97.1.el7 +7
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) kernel-tools-libs-devel-3.10.0-514.97.1.el7
  • RHSA-2022:0344 Released 2022-02-01 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) bpftool-4.18.0-147.59.1.el8_1, kernel-4.18.0-147.59.1.el8_1, kernel-abi-whitelists-4.18.0-147.59.1.el8_1 +14
  • RHSA-2022:0335 Released 2022-02-01 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) kpatch-patch-4_18_0-147_43_1-1-10.el8_1, kpatch-patch-4_18_0-147_44_1-1-9.el8_1, kpatch-patch-4_18_0-147_48_1-1-6.el8_1 +6
  • RHSA-2022:0231 Released 2022-01-24 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.4) kpatch-patch-4_18_0-305-1-10.el8, kpatch-patch-4_18_0-305_10_2-1-7.el8_4, kpatch-patch-4_18_0-305_12_1-1-6.el8_4 +7
  • RHSA-2022:0232 Released 2022-01-24 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-348-1-2.el8, kpatch-patch-4_18_0-348_2_1-1-1.el8_5, kpatch-patch-4_18_0-348_7_1-1-1.el8_5
  • RHSA-2022:0188 Released 2022-01-19 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-348.12.2.el8_5
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-348.12.2.el8_5, kernel-4.18.0-348.12.2.el8_5, kernel-abi-stablelists-4.18.0-348.12.2.el8_5 +18
  • RHSA-2022:0186 Released 2022-01-19 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.4) bpftool-4.18.0-305.34.2.el8_4, kernel-4.18.0-305.34.2.el8_4, kernel-abi-stablelists-4.18.0-305.34.2.el8_4 +19
    • Red Hat Enterprise Linux CRB EUS (v.8.4) kernel-tools-libs-devel-4.18.0-305.34.2.el8_4
  • RHSA-2022:0187 Released 2022-01-19 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV EUS (v.8.4) kernel-rt-4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-core-4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-debug-4.18.0-305.34.2.rt7.107.el8_4 +9
    • Red Hat Enterprise Linux RT EUS (v.8.4) kernel-rt-4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-core-4.18.0-305.34.2.rt7.107.el8_4, kernel-rt-debug-4.18.0-305.34.2.rt7.107.el8_4 +7
  • RHSA-2022:0176 Released 2022-01-19 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-core-4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-debug-4.18.0-348.12.2.rt7.143.el8_5 +9
    • Red Hat Enterprise Linux for Real Time (v. 8) kernel-rt-4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-core-4.18.0-348.12.2.rt7.143.el8_5, kernel-rt-debug-4.18.0-348.12.2.rt7.143.el8_5 +7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
RHEL 7-based RHEV-H for RHEV 4 (build requirements)Fixed RHSA-2022:1263
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2022:0188
Red Hat CodeReady Linux Builder EUS (v. 8.2)Fixed RHSA-2022:0636
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2022:0188, RHSA-2022:0232
Red Hat Enterprise Linux BaseOS E4S (v. 8.1)Fixed RHSA-2022:0335, RHSA-2022:0344, RHSA-2022:0958
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2022:0590, RHSA-2022:0636
Red Hat Enterprise Linux BaseOS EUS (v.8.4)Fixed RHSA-2022:0186, RHSA-2022:0231
Red Hat Enterprise Linux CRB EUS (v.8.4)Fixed RHSA-2022:0186
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2022:0620
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2022:0620
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2022:0620
Red Hat Enterprise Linux NFV EUS (v.8.4)Fixed RHSA-2022:0187
Red Hat Enterprise Linux RT EUS (v.8.4)Fixed RHSA-2022:0187
Red Hat Enterprise Linux Real Time EUS (v. 8.2)Fixed RHSA-2022:0629
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2022:0176
Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)Fixed RHSA-2022:0629
Red Hat Enterprise Linux Server (v. 6 ELS)Fixed RHSA-2022:1417
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:0592, RHSA-2022:0620
Red Hat Enterprise Linux Server AUS (v. 7.3)Fixed RHSA-2022:0529
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2022:0530
Red Hat Enterprise Linux Server AUS (v. 7.6)Fixed RHSA-2022:0531
Red Hat Enterprise Linux Server AUS (v. 7.7)Fixed RHSA-2022:0712
Red Hat Enterprise Linux Server E4S (v. 7.6)Fixed RHSA-2022:0531, RHSA-2022:0533
Red Hat Enterprise Linux Server E4S (v. 7.7)Fixed RHSA-2022:0712, RHSA-2022:0718
Red Hat Enterprise Linux Server Optional (v. 6 ELS)Fixed RHSA-2022:1417
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:0620
Red Hat Enterprise Linux Server Optional AUS (v. 7.3)Fixed RHSA-2022:0529
Red Hat Enterprise Linux Server Optional AUS (v. 7.4)Fixed RHSA-2022:0530
Red Hat Enterprise Linux Server Optional AUS (v. 7.6)Fixed RHSA-2022:0531
Red Hat Enterprise Linux Server Optional AUS (v. 7.7)Fixed RHSA-2022:0712
Red Hat Enterprise Linux Server Optional E4S (v. 7.6)Fixed RHSA-2022:0531
Red Hat Enterprise Linux Server Optional E4S (v. 7.7)Fixed RHSA-2022:0712
Red Hat Enterprise Linux Server Optional TUS (v. 7.6)Fixed RHSA-2022:0531
Red Hat Enterprise Linux Server Optional TUS (v. 7.7)Fixed RHSA-2022:0712
Red Hat Enterprise Linux Server TUS (v. 7.6)Fixed RHSA-2022:0531
Red Hat Enterprise Linux Server TUS (v. 7.7)Fixed RHSA-2022:0712
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:0620
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:0620
Red Hat Enterprise Linux for Real Time (v. 7)Fixed RHSA-2022:0622
Red Hat Enterprise Linux for Real Time (v. 8)Fixed RHSA-2022:0176
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2022:0622
Red Hat Virtualization 4 Hypervisor for RHEL 7Fixed RHSA-2022:1263
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2022:0540
Not affected: 6 products
  • RHEL 7-based RHEV-H for RHEV 4 (build requirements)
  • RHEL 8-based RHEV-H for RHEV 4 (build requirements)
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux BaseOS (v. 8)
  • Red Hat Virtualization 4 Hypervisor for RHEL 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-4155

References

Patch 2

Advisory 3

  • 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