CVE-2026-52920

HIGHPre-NVD 8.38.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. The CNA's CVSS baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week
8.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: xt_policy: fix strict mode inbound policy matching

match_policy_in() walks sec_path entries from the last transform to the first one, but strict policy matching needs to consume info->pol[] in the same forward order as the rule layout.

Derive the strict-match policy position from the number of transforms already consumed so that multi-element inbound rules are matched consistently.

CVSS v3
8.3
EG Score
8.3HIGHmedium confidence
EG Risk
37
EG Risk 37/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity83% × 45%
The EG Score, 8.3 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 24, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Jun 28, 2026
Patch available.
Web page

netfilter: xt_policy: fix strict mode inbound policy matching - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fc1c518bb1f054831ecabb32da9b8e1dff9699c6
Web page

netfilter: xt_policy: fix strict mode inbound policy matching - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f98b7f85e04b40e28b08c461ded0cc79f14f5509
Web page

netfilter: xt_policy: fix strict mode inbound policy matching - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eb323f7b82d2e2f638de0cc2a177803eb20e0707
Web page

netfilter: xt_policy: fix strict mode inbound policy matching - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9
Web page

netfilter: xt_policy: fix strict mode inbound policy matching - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/938867e870fb5471bb16f442aeac81326e05bf65
Web page

netfilter: xt_policy: fix strict mode inbound policy matching - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/82664d0f1ba25e4f9a71994954abae24c60f4067
Web page

netfilter: xt_policy: fix strict mode inbound policy matching - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4b2b4d7d4e203c92db8966b163edfacb1f0e1e29
Web page

netfilter: xt_policy: fix strict mode inbound policy matching - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/392cc1d8408b5665215c1e9290bbf0f92339b043

Patch Availability(31)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-23ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-23ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-09-23ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-09-23ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-23ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-23ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-23ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-09-23ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-09-23ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-09-23ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-09-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-09-23ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-09-23ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-09-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-09-23ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-23ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-09-23ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-09-23ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-09-23ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-09-23ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-09-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-09-23ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-23ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-09-23ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-09-23ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-09-23ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-09-23ubuntu
redhatkernel-rt-0:4.18.0-553.164.1.rt7.505.el8_102026-09-17redhat
redhatkernel-0:4.18.0-553.164.1.el8_102026-09-17redhat
redhatkernel-0:5.14.0-687.42.1.el9_82026-08-26redhat
linuxKernel @ 5.10.258 (fixes >=2.6.17)—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)
  • every version up to 5.10.259-1: fixed in 5.10.259-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)
  • every version up to 6.1.176-1~deb11u1: fixed in 6.1.176-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)
  • every version up to 6.1.176-1: fixed in 6.1.176-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)
  • every version up to 6.12.94-1: fixed in 6.12.94-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (141 versions)
  • every version up to 7.0.10-1: fixed in 7.0.10-1
—

Additional Vendor Advisories

(21)

Data Freshness Timeline

(refreshed 12× in last 7d / 35× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 329 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 229 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 05:54 UTCOSV refresh
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-10-12 15:58 UTCEG score recompute
  5. 2026-10-11 19:41 UTCEG score recompute
  6. 2026-10-11 16:56 UTCEG score recompute
  7. 2026-10-11 14:19 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  20. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  22. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
Show 75 more
  1. 2026-09-23 11:50 UTCEG score recompute
  2. 2026-09-23 11:50 UTCVendor advisory
  3. 2026-09-23 11:50 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  4. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  6. 2026-09-18 10:12 UTCEG score recompute
  7. 2026-09-18 10:12 UTCVendor advisory
  8. 2026-09-18 10:12 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  9. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  10. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  11. 2026-09-14 01:59 UTCEG score recompute
  12. 2026-09-14 01:59 UTCVendor advisory
  13. 2026-09-14 01:59 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  14. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  15. 2026-09-13 12:14 UTCEG score recompute
  16. 2026-09-13 12:14 UTCVendor advisory
  17. 2026-09-13 12:13 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  18. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  19. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  21. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  22. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  23. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  24. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  25. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  26. 2026-08-30 20:22 UTCEG score recompute
  27. 2026-08-30 20:22 UTCVendor advisory
  28. 2026-08-30 20:22 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  29. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  30. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  31. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  32. 2026-08-28 04:56 UTCEG score recompute
  33. 2026-08-28 04:56 UTCVendor advisory
  34. 2026-08-28 04:55 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  35. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  36. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  37. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  38. 2026-08-25 01:04 UTCEG score recompute
  39. 2026-08-25 01:04 UTCVendor advisory
  40. 2026-08-25 01:03 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  41. 2026-08-24 13:52 UTCEG score recompute
  42. 2026-08-24 13:52 UTCVendor advisory
  43. 2026-08-24 13:52 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  44. 2026-08-23 23:15 UTCVendor advisory
  45. 2026-08-23 23:14 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  46. 2026-08-23 12:06 UTCVendor advisory
  47. 2026-08-23 12:06 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  48. 2026-08-23 00:57 UTCEG score recompute
  49. 2026-08-23 00:57 UTCVendor advisory
  50. 2026-08-23 00:57 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  51. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  52. 2026-08-22 13:21 UTCEG score recompute
  53. 2026-08-22 13:21 UTCVendor advisory
  54. 2026-08-22 13:20 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  55. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  56. 2026-08-21 17:30 UTCVendor advisory
  57. 2026-08-21 17:30 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  58. 2026-08-21 05:55 UTCEG score recompute
  59. 2026-08-21 05:55 UTCVendor advisory
  60. 2026-08-21 05:55 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  61. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  62. 2026-08-20 18:48 UTCVendor advisory
  63. 2026-08-20 18:47 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  64. 2026-08-20 07:40 UTCEG score recompute
  65. 2026-08-20 07:40 UTCVendor advisory
  66. 2026-08-20 07:40 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  67. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  68. 2026-08-19 15:37 UTCVendor advisory
  69. 2026-08-19 15:37 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  70. 2026-08-19 04:00 UTCEG score recompute
  71. 2026-08-19 04:00 UTCVendor advisory
  72. 2026-08-19 04:00 UTCGHSA enrichmentGHSA-qgcc-gwgq-pq62 · GitHub severity HIGH · GitHub CVSS 8.3
  73. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  74. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  75. 2026-08-17 07:16 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-52920?
CVE-2026-52920 is a high-severity vulnerability; its CVE record was published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_policy: fix strict mode inbound policy matching matchpolicyin() walks sec_path entries from the last transform to the first one, but strict policy matching needs to consume info->pol[] in the same forward order as the…
When was the CVE record for CVE-2026-52920 published?
The CVE record for CVE-2026-52920 was published on June 24, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 5, 2026; the record at its source may have been updated since.
Is CVE-2026-52920 actively exploited?
CVE-2026-52920 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-52920?
CVE-2026-52920 has a CVSS base score of 8.3 (the CNA's own assessment, by linux; NVD's own analysis pending).
How do I remediate CVE-2026-52920?
A fix for CVE-2026-52920 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-52920 are linked in the Vendor Advisories panel on this page.

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