CVE-2026-43493

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-19. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

crypto: pcrypt - Fix handling of MAY_BACKLOG requests

MAY_BACKLOG requests can return EBUSY. Handle them by checking for that value and filtering out EINPROGRESS notifications.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

May 19, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Sep 2, 2026
No patch confirmed yet.
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/915b692e6cb723aac658c25eb82c58fd81235110
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/77d55bc8675ee851ed639dc9be77325a8024cf67
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eb34e243df57e32f4c08fa191f3602ea19076276
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9f1cbca178c03188e201ed175251372149bb25f2
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/76641449b28979ebd6c02e9598367e119e385236
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1d7f07df450bac3301938fbc4251f2611be4084e
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ae7e95638d956d556d74b9abb9e780d3bd3dcd9e

Vendor Advisories for CVE-2026-43493(2)

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

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1074 (5.15.0-1074.78) @ jammy2026-08-24ubuntu
ubuntulinux-tools-raspi-6.17 (6.17.0-1021.21) @ questing2026-08-24ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-08-24ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-08-24ubuntu
ubuntulinux-tools-oracle-edge (6.17.0-1018.18~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1028.28) @ noble2026-08-24ubuntu
ubuntulinux-virtual-6.8 (6.8.0-134.134) @ noble2026-08-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.185.166) @ jammy2026-08-24ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-08-24ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1057.58~22.04.1) @ jammy2026-08-24ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-08-24ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-08-24ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1108.114~20.04.1) @ focal2026-08-24ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-08-24ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1026.26) @ noble2026-08-24ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-08-24ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-08-24ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.17.0-1017.19) @ questing2026-08-24ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-08-24ubuntu
ubuntulinux-virtual-hwe-24.04 (6.17.0-40.40~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1106.112~20.04.1) @ focal2026-08-24ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-24ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1021.21~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-6.17 (6.17.0-1018.18~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-24ubuntu
redhatkernel-0:6.12.0-211.49.1.el10_22026-08-20redhat
linuxKernel @ 5.10.258—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 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 ... 6.12.86-1~bpo12+1 (19 versions)6.12.86-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.4-1~bpo13+1 (131 versions)7.0.4-1—

All Vendor Advisories

(25)

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 5× in last 7d / 152× 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 406 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43493?
CVE-2026-43493 is a critical vulnerability published on May 19, 2026. In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - Fix handling of MAY_BACKLOG requests MAY_BACKLOG requests can return EBUSY. Handle them by checking for that value and filtering out EINPROGRESS notifications.
When was CVE-2026-43493 disclosed?
CVE-2026-43493 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43493 actively exploited?
CVE-2026-43493 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.8% of all scored CVEs.
What is the CVSS score of CVE-2026-43493?
CVE-2026-43493 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-43493?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43493, 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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