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TI-2023-03370 Aliases CVE-2023-3611GHSA-x5xp-6cpr-4xwx

Out-of-bounds write in Linux kernel's net/sched: sch_qfq component

Priority LOW 36CWE-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
Fixed

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

Summary

An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks. We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00293 21st percentileScored 2026-11-07
Fix Fixed Kernel (Linux): 6.5Red Hat: 18 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxKernel3.8 to before 6.56.5Patch availableCNA
  • Kernel VendorLinux Affected 3.8 to before 6.5 Fixed in 6.5 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*3.8 to before 4.14.322; 4.15 to before 4.19.291; 4.20 to before 5.4.253; 5.5 to before 5.10.188; 5.11 to before 5.15.121; 5.16 to before 6.1.40; 6.2 to before 6.4.5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*6.5 rc1VulnerableLinux
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*12.0VulnerableDebian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.8 to before 4.14.322; 4.15 to before 4.19.291; 4.20 to before 5.4.253; 5.5 to before 5.10.188; 5.11 to before 5.15.121; 5.16 to before 6.1.40; 6.2 to before 6.4.5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* Versions 6.5 rc1 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Kernel (Linux) Fixed in 6.5

Red Hat 18 advisories

  • RHSA-2024:1831 Released 2024-04-16 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server (v. 6 ELS) kernel-2.6.32-754.53.1.el6, kernel-abi-whitelists-2.6.32-754.53.1.el6, kernel-debug-2.6.32-754.53.1.el6 +7
    • Red Hat Enterprise Linux Server Optional (v. 6 ELS) python-perf-2.6.32-754.53.1.el6
  • RHSA-2024:1382 Released 2024-03-19 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV TUS (v.8.4) kernel-rt-4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-core-4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-debug-4.18.0-305.125.1.rt7.201.el8_4 +9
    • Red Hat Enterprise Linux RT TUS (v.8.4) kernel-rt-4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-core-4.18.0-305.125.1.rt7.201.el8_4, kernel-rt-debug-4.18.0-305.125.1.rt7.201.el8_4 +7
  • RHSA-2024:1377 Released 2024-03-19 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.4) kpatch-patch-4_18_0-305_103_1-1-4.el8_4, kpatch-patch-4_18_0-305_108_1-1-3.el8_4, kpatch-patch-4_18_0-305_114_1-1-2.el8_4 +1
Show 15 more Red Hat advisories
  • RHSA-2024:1367 Released 2024-03-19 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.125.1.el8_4, kernel-4.18.0-305.125.1.el8_4, kernel-abi-stablelists-4.18.0-305.125.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.4) bpftool-4.18.0-305.125.1.el8_4, kernel-4.18.0-305.125.1.el8_4, kernel-abi-stablelists-4.18.0-305.125.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.4) bpftool-4.18.0-305.125.1.el8_4, kernel-4.18.0-305.125.1.el8_4, kernel-abi-stablelists-4.18.0-305.125.1.el8_4 +14
  • RHSA-2024:1278 Released 2024-03-12 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) kpatch-patch-4_18_0-193_113_1-1-4.el8_2, kpatch-patch-4_18_0-193_116_1-1-3.el8_2, kpatch-patch-4_18_0-193_119_1-1-2.el8_2 +1
  • RHSA-2024:1269 Released 2024-03-12 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time TUS (v. 8.2) kernel-rt-4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-core-4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-debug-4.18.0-193.128.1.rt13.179.el8_2 +7
    • Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2) kernel-rt-4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-core-4.18.0-193.128.1.rt13.179.el8_2, kernel-rt-debug-4.18.0-193.128.1.rt13.179.el8_2 +9
  • RHSA-2024:1268 Released 2024-03-12 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.128.1.el8_2, kernel-4.18.0-193.128.1.el8_2, kernel-abi-whitelists-4.18.0-193.128.1.el8_2 +14
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) bpftool-4.18.0-193.128.1.el8_2, kernel-4.18.0-193.128.1.el8_2, kernel-abi-whitelists-4.18.0-193.128.1.el8_2 +14
    • Red Hat Enterprise Linux BaseOS TUS (v. 8.2) bpftool-4.18.0-193.128.1.el8_2, kernel-4.18.0-193.128.1.el8_2, kernel-abi-whitelists-4.18.0-193.128.1.el8_2 +14
  • RHSA-2024:0575 Released 2024-01-30 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-tools-libs-devel-4.18.0-477.43.1.el8_8
    • Red Hat Enterprise Linux BaseOS EUS (v.8.8) bpftool-4.18.0-477.43.1.el8_8, kernel-4.18.0-477.43.1.el8_8, kernel-abi-stablelists-4.18.0-477.43.1.el8_8 +19
  • RHSA-2024:0554 Released 2024-01-30 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.8) kpatch-patch-4_18_0-477_21_1-1-3.el8_8, kpatch-patch-4_18_0-477_27_1-1-2.el8_8, kpatch-patch-4_18_0-477_36_1-1-1.el8_8
  • RHSA-2024:0412 Released 2024-01-25 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-tools-libs-devel-4.18.0-372.87.1.el8_6
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) bpftool-4.18.0-372.87.1.el8_6, kernel-4.18.0-372.87.1.el8_6, kernel-abi-stablelists-4.18.0-372.87.1.el8_6 +19
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 kernel-devel-4.18.0-372.87.1.el8_6, perf-4.18.0-372.87.1.el8_6
  • RHSA-2024:0378 Released 2024-01-23 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) kpatch-patch-4_18_0-372_64_1-1-4.el8_6, kpatch-patch-4_18_0-372_70_1-1-3.el8_6, kpatch-patch-4_18_0-372_75_1-1-2.el8_6 +1
  • RHSA-2024:0262 Released 2024-01-16 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.7) bpftool-3.10.0-1062.82.1.el7, kernel-3.10.0-1062.82.1.el7, kernel-abi-whitelists-3.10.0-1062.82.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.82.1.el7
  • RHSA-2024:0261 Released 2024-01-16 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.6) bpftool-3.10.0-957.109.1.el7, kernel-3.10.0-957.109.1.el7, kernel-abi-whitelists-3.10.0-957.109.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.109.1.el7
  • RHSA-2023:7423 Released 2023-11-21 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1160.105.1.el7, kernel-3.10.0-1160.105.1.el7, kernel-abi-whitelists-3.10.0-1160.105.1.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.105.1.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.105.1.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1160.105.1.el7, kernel-3.10.0-1160.105.1.el7, kernel-abi-whitelists-3.10.0-1160.105.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1160.105.1.el7, kernel-tools-libs-devel-3.10.0-1160.105.1.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1160.105.1.el7, kernel-3.10.0-1160.105.1.el7, kernel-abi-whitelists-3.10.0-1160.105.1.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.105.1.el7
  • RHSA-2023:7419 Released 2023-11-21 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux Server (v. 7) kpatch-patch-3_10_0-1160_102_1-1-1.el7, kpatch-patch-3_10_0-1160_90_1-1-4.el7, kpatch-patch-3_10_0-1160_92_1-1-4.el7 +2
  • RHSA-2023:7424 Released 2023-11-21 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1160.105.1.rt56.1256.el7, kernel-rt-debug-3.10.0-1160.105.1.rt56.1256.el7, kernel-rt-debug-devel-3.10.0-1160.105.1.rt56.1256.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1160.105.1.rt56.1256.el7, kernel-rt-debug-3.10.0-1160.105.1.rt56.1256.el7, kernel-rt-debug-devel-3.10.0-1160.105.1.rt56.1256.el7 +7
  • RHSA-2023:7077 Released 2023-11-14 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-513.5.1.el8_9
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-513.5.1.el8_9, kernel-4.18.0-513.5.1.el8_9, kernel-abi-stablelists-4.18.0-513.5.1.el8_9 +19
  • RHSA-2023:6901 Released 2023-11-14 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-core-4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-debug-4.18.0-513.5.1.rt7.307.el8_9 +7
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-core-4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-debug-4.18.0-513.5.1.rt7.307.el8_9 +9

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-2023:7077
Red Hat CodeReady Linux Builder EUS (v.8.6)Fixed RHSA-2024:0412
Red Hat CodeReady Linux Builder EUS (v.8.8)Fixed RHSA-2024:0575
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2023:7077
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2024:1268
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2024:1367
Red Hat Enterprise Linux BaseOS E4S (v. 8.2)Fixed RHSA-2024:1268, RHSA-2024:1278
Red Hat Enterprise Linux BaseOS E4S (v.8.4)Fixed RHSA-2024:1367, RHSA-2024:1377
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2024:0378, RHSA-2024:0412
Red Hat Enterprise Linux BaseOS EUS (v.8.8)Fixed RHSA-2024:0554, RHSA-2024:0575
Red Hat Enterprise Linux BaseOS TUS (v. 8.2)Fixed RHSA-2024:1268
Red Hat Enterprise Linux BaseOS TUS (v.8.4)Fixed RHSA-2024:1367
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2023:7423
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2023:7423
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2023:7423
Red Hat Enterprise Linux NFV TUS (v.8.4)Fixed RHSA-2024:1382
Red Hat Enterprise Linux RT TUS (v.8.4)Fixed RHSA-2024:1382
Red Hat Enterprise Linux Real Time (v. 8)Fixed RHSA-2023:6901
Red Hat Enterprise Linux Real Time TUS (v. 8.2)Fixed RHSA-2024:1269
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2023:6901
Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2)Fixed RHSA-2024:1269
Red Hat Enterprise Linux Server (v. 6 ELS)Fixed RHSA-2024:1831
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2023:7419, RHSA-2023:7423
Red Hat Enterprise Linux Server AUS (v. 7.6)Fixed RHSA-2024:0261
Red Hat Enterprise Linux Server AUS (v. 7.7)Fixed RHSA-2024:0262
Red Hat Enterprise Linux Server Optional (v. 6 ELS)Fixed RHSA-2024:1831
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2023:7423
Red Hat Enterprise Linux Server Optional AUS (v. 7.6)Fixed RHSA-2024:0261
Red Hat Enterprise Linux Server Optional AUS (v. 7.7)Fixed RHSA-2024:0262
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2023:7423
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2023:7423
Red Hat Enterprise Linux for Real Time (v. 7)Fixed RHSA-2023:7424
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2023:7424
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2024:0412
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-3611
  2. 2026-10-03 Alias added: GHSA-x5xp-6cpr-4xwx

References

Patch 2

Advisory 4

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