CVE-2023-53727

UNRATEDCVSS · not yet scored
—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: —Exploit: 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:

net/sched: fq_pie: avoid stalls in fq_pie_timer()

When setting a high number of flows (limit being 65536), fq_pie_timer() is currently using too much time as syzbot reported.

Add logic to yield the cpu every 2048 flows (less than 150 usec on debug kernels). It should also help by not blocking qdisc fast paths for too long. Worst case (65536 flows) would need 31 jiffies for a complete scan.

Relevant extract from syzbot report:

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2663 jiffies s: 873 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5177 Comm: syz-executor273 Not tainted 6.5.0-syzkaller-00453-g727dbda16b83 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:write_comp_data+0x21/0x90 kernel/kcov.c:236 Code: 2e 0f 1f 84 00 00 00 00 00 65 8b 05 01 b2 7d 7e 49 89 f1 89 c6 49 89 d2 81 e6 00 01 00 00 49 89 f8 65 48 8b 14 25 80 b9 03 00 00 01 ff 00 74 0e 85 f6 74 59 8b 82 04 16 00 00 85 c0 74 4f 8b RSP: 0018:ffffc90000007bb8 EFLAGS: 00000206 RAX: 0000000000000101 RBX: ffffc9000dc0d140 RCX: ffffffff885893b0 RDX: ffff88807c075940 RSI: 0000000000000100 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000dc0d178 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555555d54380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6b442f6130 CR3: 000000006fe1c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pie_calculate_probability+0x480/0x850 net/sched/sch_pie.c:415 fq_pie_timer+0x1da/0x4f0 net/sched/sch_fq_pie.c:387 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700

CVSS v3
—
EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
—
EG Risk
—
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

October 22, 2025

Last Modified

April 15, 2026

References (5)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.10.195—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.

Data Freshness Timeline

(refreshed 9× in last 7d / 43× 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 133 total refreshes for this CVE.

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

Frequently asked(4)

What is CVE-2023-53727?
CVE-2023-53727 is a publicly disclosed vulnerability published on October 22, 2025. In the Linux kernel, the following vulnerability has been resolved: net/sched: fqpie: avoid stalls in fqpie_timer() When setting a high number of flows (limit being 65536), fqpietimer() is currently using too much time as syzbot reported. Add logic to yield the cpu every 2048 flows (less than 150…
When was CVE-2023-53727 disclosed?
CVE-2023-53727 was first published in the National Vulnerability Database on October 22, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-53727 actively exploited?
CVE-2023-53727 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 91.6% of all scored CVEs.
How do I remediate CVE-2023-53727?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-53727, 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

Explore the affected products and dependency analysis for CVE-2023-53727

Explore →

Is Your Infrastructure Affected by CVE-2023-53727?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs