CVE-2026-53241

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-25. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

ALSA: seq: dummy: fix UMP event stack overread

The dummy sequencer port forwards events by copying an incoming struct snd_seq_event into a stack temporary, rewriting source and destination, and dispatching the temporary to subscribers. That legacy event storage is smaller than struct snd_seq_ump_event.

When a UMP event reaches the dummy client, the copy leaves the UMP flag set but only provides legacy-sized stack storage. The subscriber delivery path then uses snd_seq_event_packet_size() and copies a UMP-sized packet from that stack object, reading past the end of the temporary.

Use the existing union __snd_seq_event storage and copy the packet size reported for the incoming event before rewriting the common routing fields. This preserves the full UMP packet for UMP events while keeping legacy event handling unchanged.

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
6%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 7, 2026

Advisory Details (4)

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

ALSA: seq: dummy: fix UMP event stack overread - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a7ef78a2c536242ccb7a4429da01580b2409bb24
generic

ALSA: seq: dummy: fix UMP event stack overread - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6676b6063440561db600494049ce7ffb695c8cc4
generic

ALSA: seq: dummy: fix UMP event stack overread - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6671a46144f880c5a167930ebb14c12f3d059fe9
generic

ALSA: seq: dummy: fix UMP event stack overread - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2b5ff4db5d7aa5b981d966df02e687f79ad7b311

Vendor Advisories for CVE-2026-53241(1)

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

Affected Packages

(2 across 2 ecosystems)
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 (145 versions)7.0.13-1—

Data Freshness Timeline

(refreshed 4× in last 7d / 47× 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 150 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-53241?
CVE-2026-53241 is a medium vulnerability published on June 25, 2026. In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: dummy: fix UMP event stack overread The dummy sequencer port forwards events by copying an incoming struct sndseqevent into a stack temporary, rewriting source and destination, and dispatching the temporary to…
When was CVE-2026-53241 disclosed?
CVE-2026-53241 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on July 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53241 actively exploited?
CVE-2026-53241 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 94.3% of all scored CVEs.
What is the CVSS score of CVE-2026-53241?
CVE-2026-53241 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53241?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53241, 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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