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TI-2020-15452 Aliases CVE-2020-25211GHSA-q7g7-fmmr-xhp8

In the Linux kernel through 5.8.7, local attackers able to inject conntrack netlink…

Priority LOW 28CWE-120Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Partial Red Hat: 35 fixed, 4 without a fix

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

Summary

In the Linux kernel through 5.8.7, local attackers able to inject conntrack netlink configuration could overflow a local buffer, causing crashes or triggering use of incorrect protocol numbers in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c, aka CID-1cc5ef91d2ff.

Why it matters now

EPSS 0.00566 47th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 12 advisoriesRed Hat: 35 fixed, 4 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 · 5

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*up to 5.8.7VulnerableLinux
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 5.8.7 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject

Remediation

Red Hat 12 advisories

  • RHSA-2021:2355 Released 2021-06-09 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 7.6) bpftool-3.10.0-957.76.1.el7, kernel-3.10.0-957.76.1.el7, kernel-abi-whitelists-3.10.0-957.76.1.el7 +8
    • Red Hat Enterprise Linux Server E4S (v. 7.6) bpftool-3.10.0-957.76.1.el7, kernel-3.10.0-957.76.1.el7, kernel-abi-whitelists-3.10.0-957.76.1.el7 +10
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.76.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.6) kernel-debug-devel-3.10.0-957.76.1.el7, kernel-tools-libs-devel-3.10.0-957.76.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.6) kernel-tools-libs-devel-3.10.0-957.76.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.6) bpftool-3.10.0-957.76.1.el7, kernel-3.10.0-957.76.1.el7, kernel-abi-whitelists-3.10.0-957.76.1.el7 +8
  • RHSA-2021:2164 Released 2021-06-01 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) kernel-3.10.0-693.87.1.el7, kernel-abi-whitelists-3.10.0-693.87.1.el7, kernel-debug-3.10.0-693.87.1.el7 +7
    • Red Hat Enterprise Linux Server E4S (v. 7.4) kernel-3.10.0-693.87.1.el7, kernel-abi-whitelists-3.10.0-693.87.1.el7, kernel-bootwrapper-3.10.0-693.87.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.87.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debug-devel-3.10.0-693.87.1.el7, kernel-tools-libs-devel-3.10.0-693.87.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.87.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.4) kernel-3.10.0-693.87.1.el7, kernel-abi-whitelists-3.10.0-693.87.1.el7, kernel-debug-3.10.0-693.87.1.el7 +7
  • 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
Show 9 more Red Hat advisories
  • RHSA-2021:0856 Released 2021-03-16 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1160.21.1.el7, kernel-3.10.0-1160.21.1.el7, kernel-abi-whitelists-3.10.0-1160.21.1.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.21.1.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.21.1.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1160.21.1.el7, kernel-3.10.0-1160.21.1.el7, kernel-abi-whitelists-3.10.0-1160.21.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1160.21.1.el7, kernel-tools-libs-devel-3.10.0-1160.21.1.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1160.21.1.el7, kernel-3.10.0-1160.21.1.el7, kernel-abi-whitelists-3.10.0-1160.21.1.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.21.1.el7
  • RHSA-2021:0857 Released 2021-03-16 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debug-3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debug-devel-3.10.0-1160.21.1.rt56.1158.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debug-3.10.0-1160.21.1.rt56.1158.el7, kernel-rt-debug-devel-3.10.0-1160.21.1.rt56.1158.el7 +7
  • RHSA-2021:0765 Released 2021-03-09 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v. 8.2) kernel-tools-libs-devel-4.18.0-193.46.1.el8_2
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) bpftool-4.18.0-193.46.1.el8_2, kernel-4.18.0-193.46.1.el8_2, kernel-abi-whitelists-4.18.0-193.46.1.el8_2 +19
  • RHSA-2021:0774 Released 2021-03-09 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time EUS (v. 8.2) kernel-rt-4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-core-4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-4.18.0-193.46.1.rt13.96.el8_2 +7
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) kernel-rt-4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-core-4.18.0-193.46.1.rt13.96.el8_2, kernel-rt-debug-4.18.0-193.46.1.rt13.96.el8_2 +9
  • RHSA-2021:0763 Released 2021-03-09 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) kpatch-patch-4_18_0-193-1-10.el8, kpatch-patch-4_18_0-193_13_2-1-5.el8_2, kpatch-patch-4_18_0-193_14_3-1-5.el8_2 +8
  • RHSA-2021:0184 Released 2021-01-19 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v. 8.1)
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kernel-4.18.0-147.38.1.el8_1, kernel-core-4.18.0-147.38.1.el8_1, kernel-debug-4.18.0-147.38.1.el8_1 +12
  • RHSA-2021:0189 Released 2021-01-19 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kpatch-patch-4_18_0-147_13_2-1-6.el8_1, kpatch-patch-4_18_0-147_20_1-1-5.el8_1, kpatch-patch-4_18_0-147_24_2-1-3.el8_1 +5
  • RHSA-2021:0003 Released 2021-01-04 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-240.10.1.el8_3
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-240.10.1.el8_3, kernel-4.18.0-240.10.1.el8_3, kernel-abi-whitelists-4.18.0-240.10.1.el8_3 +19
  • RHSA-2021:0004 Released 2021-01-04 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-240.10.1.rt7.64.el8_3, kernel-rt-core-4.18.0-240.10.1.rt7.64.el8_3, kernel-rt-debug-4.18.0-240.10.1.rt7.64.el8_3 +7
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-240.10.1.rt7.64.el8_3, kernel-rt-core-4.18.0-240.10.1.rt7.64.el8_3, kernel-rt-debug-4.18.0-240.10.1.rt7.64.el8_3 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Enterprise MRG 2AffectedNo fix planned: Out of support scope
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2021:0003
Red Hat CodeReady Linux Builder EUS (v. 8.1)Fixed RHSA-2021:0184
Red Hat CodeReady Linux Builder EUS (v. 8.2)Fixed RHSA-2021:0765
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2021:0003
Red Hat Enterprise Linux BaseOS EUS (v. 8.1)Fixed RHSA-2021:0184, RHSA-2021:0189
Red Hat Enterprise Linux BaseOS EUS (v. 8.2)Fixed RHSA-2021:0763, RHSA-2021:0765
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7)Fixed RHSA-2021:1531
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7)Fixed RHSA-2021:1531
Red Hat Enterprise Linux Real Time (v. 8)Fixed RHSA-2021:0004
Red Hat Enterprise Linux Real Time EUS (v. 8.2)Fixed RHSA-2021:0774
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2021:0004
Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)Fixed RHSA-2021:0774
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Server AUS (v. 7.6)Fixed RHSA-2021:2355
Red Hat Enterprise Linux Server E4S (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Server E4S (v. 7.6)Fixed RHSA-2021:2355
Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2021:1531
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux Server Optional AUS (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Server Optional AUS (v. 7.6)Fixed RHSA-2021:2355
Red Hat Enterprise Linux Server Optional E4S (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Server Optional E4S (v. 7.6)Fixed RHSA-2021:2355
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-2021:2164
Red Hat Enterprise Linux Server Optional TUS (v. 7.6)Fixed RHSA-2021:2355
Red Hat Enterprise Linux Server TUS (v. 7.4)Fixed RHSA-2021:2164
Red Hat Enterprise Linux Server TUS (v. 7.6)Fixed RHSA-2021:2355
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2021:0856
Red Hat Enterprise Linux for Real Time (v. 7)Fixed RHSA-2021:0857
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2021:0857
Not affected: 2 products
  • Red Hat CodeReady Linux Builder EUS (v. 8.1)
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.1)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-25211
  2. 2026-10-03 Alias added: GHSA-q7g7-fmmr-xhp8

References

Exploit 1

Advisory 8

Sources

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