crypto: pcrypt - Fix handling of MAY_BACKLOG requests
Summary
| CVE | CVE-2026-43493 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-19 12:16:19 UTC |
| Updated | 2026-06-26 17:30:15 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.000700000 probability, percentile 0.215780000 (date 2026-06-04)
Problem Types: NVD-CWE-noinfo
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 5a1436beec5744029f3ac90b6fe71a698dcd6155 ae7e95638d956d556d74b9abb9e780d3bd3dcd9e git | Not specified |
| CNA | Linux | Linux | affected 5a1436beec5744029f3ac90b6fe71a698dcd6155 1d7f07df450bac3301938fbc4251f2611be4084e git | Not specified |
| CNA | Linux | Linux | affected 5a1436beec5744029f3ac90b6fe71a698dcd6155 76641449b28979ebd6c02e9598367e119e385236 git | Not specified |
| CNA | Linux | Linux | affected 5a1436beec5744029f3ac90b6fe71a698dcd6155 9f1cbca178c03188e201ed175251372149bb25f2 git | Not specified |
| CNA | Linux | Linux | affected 5a1436beec5744029f3ac90b6fe71a698dcd6155 eb34e243df57e32f4c08fa191f3602ea19076276 git | Not specified |
| CNA | Linux | Linux | affected 5a1436beec5744029f3ac90b6fe71a698dcd6155 77d55bc8675ee851ed639dc9be77325a8024cf67 git | Not specified |
| CNA | Linux | Linux | affected 5a1436beec5744029f3ac90b6fe71a698dcd6155 46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a git | Not specified |
| CNA | Linux | Linux | affected 5a1436beec5744029f3ac90b6fe71a698dcd6155 915b692e6cb723aac658c25eb82c58fd81235110 git | Not specified |
| CNA | Linux | Linux | affected 2.6.34 | Not specified |
| CNA | Linux | Linux | unaffected 2.6.34 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.258 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.209 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.175 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.140 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.86 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.27 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.4 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/77d55bc8675ee851ed639dc9be77325a8024cf67 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/76641449b28979ebd6c02e9598367e119e385236 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/ae7e95638d956d556d74b9abb9e780d3bd3dcd9e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/9f1cbca178c03188e201ed175251372149bb25f2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/915b692e6cb723aac658c25eb82c58fd81235110 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/1d7f07df450bac3301938fbc4251f2611be4084e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/eb34e243df57e32f4c08fa191f3602ea19076276 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.