CVE-2026-53295

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-26. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

mailbox: add sanity check for channel array

Fail gracefully if there is no channel array attached to the mailbox controller. Otherwise the later dereference will cause an OOPS which might not be seen because mailbox controllers might instantiate very early. Remove the comment explaining the obvious while here.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 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

September 8, 2026

Advisory Details (8)

Auto-updated Jul 8, 2026
No patch confirmed yet.
generic

mailbox: add sanity check for channel array - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d44872a569b8fbacde457ff2587a775e5004bb79
generic

mailbox: add sanity check for channel array - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c1aad75595fb67edc7fda8af249d3b886efa1be9
generic

mailbox: add sanity check for channel array - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9dd7489943324298bb0f385495795a82f1dd6507
generic

mailbox: add sanity check for channel array - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6362c4a7d7e21e68cd9aa04df7cde16befba3a4b
generic

mailbox: add sanity check for channel array - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5cc3300fab262b26c28bc2fc06df693410c3840b
generic

mailbox: add sanity check for channel array - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/37792091ab28ba030fd8d61184c47d4d51294170
generic

mailbox: add sanity check for channel array - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/14aed0d4e58389cc6a88acf8610b12d3e476272b
generic

mailbox: add sanity check for channel array - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0f11444271110d9b5bc6316a153c6431abda899c

Vendor Advisories for CVE-2026-53295(2)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-09-08ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-09-08ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-09-08ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-09-08ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-08ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-09-08ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-09-08ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-09-08ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-08ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-09-08ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-09-08ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-09-08ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-09-08ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-08ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-09-08ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-09-08ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-08ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-09-08ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-09-08ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-09-08ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-09-08ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-09-08ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16~24.04.1) @ noble2026-09-08ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-08ubuntu

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 ... 5.10.92-2 (54 versions)5.10.259-1—
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—

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 72× 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 196 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. 2026-09-08 09:43 UTCVendor advisory
  5. 2026-09-08 09:43 UTCGHSA enrichment
  6. 2026-09-08 08:58 UTCEG score recompute
  7. 2026-09-08 08:58 UTCVendor advisory
  8. 2026-09-08 08:57 UTCGHSA enrichment
  9. 2026-09-07 16:01 UTCEPSS rescore
  10. 2026-09-06 14:54 UTCEG score recompute
  11. 2026-09-06 14:54 UTCVendor advisory
  12. 2026-09-06 14:53 UTCGHSA enrichment
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-04 05:06 UTCEPSS rescore
  15. 2026-09-02 14:12 UTCEPSS rescore
  16. 2026-09-01 13:54 UTCEPSS rescore
  17. 2026-08-30 19:17 UTCEPSS rescore
  18. 2026-08-30 19:15 UTCEG score recompute
  19. 2026-08-30 19:15 UTCVendor advisory
  20. 2026-08-30 19:15 UTCGHSA enrichment
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:41 UTCEPSS rescore
  23. 2026-08-27 22:54 UTCEG score recompute
  24. 2026-08-27 22:54 UTCVendor advisory
  25. 2026-08-27 22:54 UTCGHSA enrichment
Show 75 more
  1. 2026-08-27 14:25 UTCEPSS rescore
  2. 2026-08-26 14:46 UTCEPSS rescore
  3. 2026-08-25 13:49 UTCEPSS rescore
  4. 2026-08-24 12:45 UTCEG score recompute
  5. 2026-08-24 12:45 UTCVendor advisory
  6. 2026-08-24 12:45 UTCGHSA enrichment
  7. 2026-08-23 09:40 UTCEG score recompute
  8. 2026-08-23 09:40 UTCVendor advisory
  9. 2026-08-23 09:40 UTCGHSA enrichment
  10. 2026-08-23 00:19 UTCEPSS rescore
  11. 2026-08-22 09:21 UTCEG score recompute
  12. 2026-08-22 09:21 UTCVendor advisory
  13. 2026-08-22 09:21 UTCGHSA enrichment
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 07:13 UTCEG score recompute
  16. 2026-08-21 07:13 UTCVendor advisory
  17. 2026-08-21 07:13 UTCGHSA enrichment
  18. 2026-08-20 22:55 UTCEPSS rescore
  19. 2026-08-20 06:33 UTCEG score recompute
  20. 2026-08-20 06:33 UTCVendor advisory
  21. 2026-08-20 06:33 UTCGHSA enrichment
  22. 2026-08-19 17:04 UTCEPSS rescore
  23. 2026-08-18 23:36 UTCEG score recompute
  24. 2026-08-18 23:36 UTCVendor advisory
  25. 2026-08-18 23:36 UTCGHSA enrichment
  26. 2026-08-18 23:30 UTCGHSA enrichment
  27. 2026-08-18 13:48 UTCEPSS rescore
  28. 2026-08-17 13:47 UTCEPSS rescore
  29. 2026-08-17 08:52 UTCEG score recompute
  30. 2026-08-17 08:52 UTCVendor advisory
  31. 2026-08-17 08:52 UTCGHSA enrichment
  32. 2026-08-16 14:56 UTCEPSS rescore
  33. 2026-08-16 08:34 UTCEG score recompute
  34. 2026-08-16 08:34 UTCVendor advisory
  35. 2026-08-16 08:34 UTCGHSA enrichment
  36. 2026-08-16 02:14 UTCEPSS rescore
  37. 2026-08-15 08:15 UTCEG score recompute
  38. 2026-08-15 08:15 UTCVendor advisory
  39. 2026-08-15 08:15 UTCGHSA enrichment
  40. 2026-08-15 01:30 UTCEPSS rescore
  41. 2026-08-14 06:33 UTCEG score recompute
  42. 2026-08-14 06:33 UTCVendor advisory
  43. 2026-08-14 06:33 UTCGHSA enrichment
  44. 2026-08-13 22:00 UTCEPSS rescore
  45. 2026-08-13 06:14 UTCEG score recompute
  46. 2026-08-13 06:14 UTCVendor advisory
  47. 2026-08-13 06:14 UTCGHSA enrichment
  48. 2026-08-12 13:51 UTCEPSS rescore
  49. 2026-08-12 05:55 UTCEG score recompute
  50. 2026-08-12 05:55 UTCVendor advisory
  51. 2026-08-12 05:55 UTCGHSA enrichment
  52. 2026-08-11 05:19 UTCEG score recompute
  53. 2026-08-11 05:19 UTCVendor advisory
  54. 2026-08-11 05:19 UTCGHSA enrichment
  55. 2026-08-11 00:00 UTCEPSS rescore
  56. 2026-08-10 05:01 UTCEG score recompute
  57. 2026-08-10 05:01 UTCVendor advisory
  58. 2026-08-10 05:01 UTCGHSA enrichment
  59. 2026-08-09 13:46 UTCEPSS rescore
  60. 2026-08-09 04:42 UTCEG score recompute
  61. 2026-08-09 04:42 UTCVendor advisory
  62. 2026-08-09 04:42 UTCGHSA enrichment
  63. 2026-08-08 16:37 UTCEPSS rescore
  64. 2026-08-08 04:24 UTCEG score recompute
  65. 2026-08-08 04:24 UTCVendor advisory
  66. 2026-08-08 04:24 UTCGHSA enrichment
  67. 2026-08-07 04:05 UTCEG score recompute
  68. 2026-08-07 04:05 UTCVendor advisory
  69. 2026-08-07 04:05 UTCGHSA enrichment
  70. 2026-08-06 13:47 UTCEPSS rescore
  71. 2026-08-06 03:46 UTCEG score recompute
  72. 2026-08-06 03:46 UTCVendor advisory
  73. 2026-08-06 03:46 UTCGHSA enrichment
  74. 2026-08-05 19:17 UTCEPSS rescore
  75. 2026-08-05 03:28 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-53295?
CVE-2026-53295 is a medium vulnerability published on June 26, 2026. In the Linux kernel, the following vulnerability has been resolved: mailbox: add sanity check for channel array Fail gracefully if there is no channel array attached to the mailbox controller. Otherwise the later dereference will cause an OOPS which might not be seen because mailbox controllers…
When was CVE-2026-53295 disclosed?
CVE-2026-53295 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53295 actively exploited?
CVE-2026-53295 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 97.0% of all scored CVEs.
What is the CVSS score of CVE-2026-53295?
CVE-2026-53295 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53295?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53295, 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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