CVE-2026-53268

HIGHPre-NVD 8.28.2
EchelonGraph scoreMEDIUM confidence

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

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. A secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-39219 (ENISA EUVD) · GHSA-3j2m-3xq8-9948 (GitHub Security Advisories)Source: ENISA EUVD

8.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

netfilter: conntrack_irc: fix possible out-of-bounds read

When parsing fails after we've matched the command string we should bail out instead of trying to match a different command.

This helper should be deprecated, given prevalence of TLS I doubt it has any relevance in 2026.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
52
EG Risk 52/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity82% × 45%
Impact severity (EG Severity): CVSS 8.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
44th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.2): severity, escalated by confirmed exploitation. This CVE's 8.2 is its impact severity (EG Severity), not escalated.

EG Severity
8.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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 25, 2026

Last Modified

October 19, 2026

Advisory Details (8)

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

netfilter: conntrack_irc: fix possible out-of-bounds read - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ddddd8271359961e403d11c90c9ba9fc38914f7e
Web page

netfilter: conntrack_irc: fix possible out-of-bounds read - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9e5da2379f968a3ea5a6e38921ab6201576466dc
Web page

netfilter: conntrack_irc: fix possible out-of-bounds read - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8a1d6e40dedfe1068aee094d851bd69e289c9fd6
Web page

netfilter: conntrack_irc: fix possible out-of-bounds read - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7c34f91305292083253df6a9f6c8ede02d4ccaea
Web page

netfilter: conntrack_irc: fix possible out-of-bounds read - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/66eba0ffce3b7e11449946b4cbbef8ea36112f56
Web page

netfilter: conntrack_irc: fix possible out-of-bounds read - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/573810f61bcd6b6815e2ff53bbdd2b9c9d747176
Web page

netfilter: conntrack_irc: fix possible out-of-bounds read - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4cdda7f868f48e2f81579371584fdbdce37df2c8
Web page

netfilter: conntrack_irc: fix possible out-of-bounds read - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0afc802160af0df61ed374fdb97fb34cfe5cdf2f

Patch Availability(28)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-virtual-6.8 (6.8.0-146.146) @ noble2026-10-27ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1070.78+fips1) @ noble2026-10-27ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1070.78) @ noble2026-10-27ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-10-27ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1011.11) @ resolute2026-10-27ubuntu
ubuntulinux-tools-azure-edge (7.0.0-1014.14~24.04.1) @ noble2026-10-27ubuntu
ubuntulinux-tools-oracle-edge (7.0.0-1011.11~24.04.1) @ noble2026-10-27ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1122.131) @ jammy2026-10-27ubuntu
ubuntulinux-tools-gcp-lts-22.04 (5.15.0.1118.115) @ jammy2026-10-27ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-10-27ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-10-27ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-10-27ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1019.19) @ resolute2026-10-27ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2018.18) @ resolute2026-10-27ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1036.39) @ noble2026-10-27ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1063.66) @ noble2026-10-27ubuntu
ubuntulinux-tools-gcp-lts-24.04 (6.8.0-1070.78) @ noble2026-10-27ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1112.112) @ jammy2026-10-27ubuntu
ubuntulinux-tools-ibm-7.0 (7.0.0-1013.13) @ resolute2026-10-27ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1118.128~20.04.1) @ focal2026-10-27ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1080 (5.15.0-1080.84) @ jammy2026-10-27ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1114.120~20.04.1) @ focal2026-10-27ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18) @ resolute2026-10-27ubuntu
ubuntulinux-tools-ibm-edge (6.8.0-1066.67~22.04.1) @ jammy2026-10-27ubuntu
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 @ 5.10.259 (fixes >=2.6.20)—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 (146 versions)
  • every version up to 7.0.13-1: fixed in 7.0.13-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(21)

Data Freshness Timeline

(refreshed 10× in last 7d / 58× 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 390 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 290 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  4. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  6. 2026-10-27 19:14 UTCEG score recompute
  7. 2026-10-27 19:14 UTCVendor advisory
  8. 2026-10-27 19:14 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  12. 2026-10-25 14:20 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  15. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-10-19 20:39 UTCEG score recompute
  19. 2026-10-19 20:39 UTCVendor advisory
  20. 2026-10-19 20:38 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  21. 2026-10-19 20:05 UTCEG score recompute
  22. 2026-10-19 20:05 UTCVendor advisory
  23. 2026-10-19 20:04 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  24. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  25. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
Show 75 more
  1. 2026-10-18 03:31 UTCEG score recompute
  2. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-10-16 17:13 UTCEG score recompute
  4. 2026-10-16 17:13 UTCVendor advisory
  5. 2026-10-16 17:13 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  6. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-10-16 15:48 UTCEG score recompute
  8. 2026-10-16 15:48 UTCVendor advisory
  9. 2026-10-16 15:47 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  10. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-15 02:30 UTCEG score recompute
  12. 2026-10-15 02:30 UTCVendor advisory
  13. 2026-10-15 02:30 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  14. 2026-10-15 01:33 UTCEG score recompute
  15. 2026-10-15 01:33 UTCVendor advisory
  16. 2026-10-15 01:32 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  17. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-10-13 22:54 UTCOSV refresh
  19. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  20. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  21. 2026-10-12 15:57 UTCEG score recompute
  22. 2026-10-11 19:41 UTCEG score recompute
  23. 2026-10-11 16:55 UTCEG score recompute
  24. 2026-10-11 14:19 UTCEG score recompute
  25. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  26. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  27. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  28. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  29. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  30. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  31. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  32. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  33. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  34. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  35. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  36. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  37. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  38. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  39. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  40. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  41. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  42. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  43. 2026-09-23 08:50 UTCEG score recompute
  44. 2026-09-23 08:50 UTCVendor advisory
  45. 2026-09-23 08:50 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  46. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  47. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  48. 2026-09-18 07:28 UTCEG score recompute
  49. 2026-09-18 07:28 UTCVendor advisory
  50. 2026-09-18 07:28 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  51. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  52. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  53. 2026-09-14 01:22 UTCEG score recompute
  54. 2026-09-14 01:22 UTCVendor advisory
  55. 2026-09-14 01:22 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  56. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  57. 2026-09-13 09:40 UTCVendor advisory
  58. 2026-09-13 09:40 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  59. 2026-09-12 15:51 UTCEG score recompute
  60. 2026-09-12 15:51 UTCVendor advisory
  61. 2026-09-12 15:51 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  62. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  63. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  64. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  65. 2026-09-08 09:43 UTCEG score recompute
  66. 2026-09-08 09:43 UTCVendor advisory
  67. 2026-09-08 09:43 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  68. 2026-09-08 08:58 UTCEG score recompute
  69. 2026-09-08 08:58 UTCVendor advisory
  70. 2026-09-08 08:57 UTCGHSA enrichmentGHSA-3j2m-3xq8-9948 · GitHub severity HIGH · GitHub CVSS 8.2
  71. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  72. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  73. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  74. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  75. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 27th percentile

Frequently asked(5)

What is CVE-2026-53268?
CVE-2026-53268 is a high-severity vulnerability; its CVE record was published on June 25, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack_irc: fix possible out-of-bounds read When parsing fails after we've matched the command string we should bail out instead of trying to match a different command. This helper should be deprecated, given…
When was the CVE record for CVE-2026-53268 published?
The CVE record for CVE-2026-53268 was published on June 25, 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 October 19, 2026; the record at its source may have been updated since.
Is CVE-2026-53268 actively exploited?
CVE-2026-53268 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53268?
CVE-2026-53268 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53268?
A fix for CVE-2026-53268 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53268 are linked in the Vendor Advisories panel on this page.

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