CVE-2026-53303

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-26. NVD baseline CVSS 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

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

f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()

In f2fs_sbi_show(), the extension_list, extension_count and hot_ext_count are read without holding sbi->sb_lock. If a concurrent sysfs store modifies the extension list via f2fs_update_extension_list(), the show path may read inconsistent count and array contents, potentially leading to out-of-bounds access or displaying stale data.

Fix this by holding sb_lock around the entire extension list read and format operation.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

June 26, 2026

Last Modified

July 6, 2026

Advisory Details (6)

Auto-updated Jul 7, 2026
No patch confirmed yet.
generic

f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e
generic

f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d3ff0c121bbaef026df6248ab7ef6f0b068b0647
generic

f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d0e877810baf613b018fd9747440b9d4d9db1428
generic

f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cea15f66b7b68b2c50943a6660e0692c6635e4eb
generic

f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5909bedbed38c558bee7cb6758ceedf9bc3a9194
generic

f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4b3a1bf4c2ffd4c9595d900ead78c9035894a025

Vendor Advisories for CVE-2026-53303(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-09-06ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-09-06ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-09-06ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-09-06ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-09-06ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-06ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-09-06ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-06ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-09-06ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-09-06ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-06ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-09-06ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-09-06ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-06ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-09-06ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-09-06ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-06ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-09-06ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-09-06ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-09-06ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-06ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-06ubuntu

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 rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (140 versions)7.0.10-1—

Weakness Classification(1)

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

All Vendor Advisories

(22)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 84× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 234 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-53303?
CVE-2026-53303 is a high vulnerability published on June 26, 2026. In the Linux kernel, the following vulnerability has been resolved: f2fs: protect extensionlist reading with sblock in f2fssbishow() In f2fssbishow(), the extensionlist, extensioncount and hotextcount are read without holding sbi->sb_lock. If a concurrent sysfs store modifies the extension list via…
When was CVE-2026-53303 disclosed?
CVE-2026-53303 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53303 actively exploited?
CVE-2026-53303 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.4% of all scored CVEs.
What is the CVSS score of CVE-2026-53303?
CVE-2026-53303 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-53303?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53303, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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