Linux Kernel: pcrypt MAY_BACKLOG EBUSY/EINPROGRESS Handling Fix
CVE-2026-43493 Published on May 19, 2026
crypto: pcrypt - Fix handling of MAY_BACKLOG requests
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.
Products Associated with CVE-2026-43493
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Affected Versions
Linux:- Version 5a1436beec5744029f3ac90b6fe71a698dcd6155 and below 9f1cbca178c03188e201ed175251372149bb25f2 is affected.
- Version 5a1436beec5744029f3ac90b6fe71a698dcd6155 and below eb34e243df57e32f4c08fa191f3602ea19076276 is affected.
- Version 5a1436beec5744029f3ac90b6fe71a698dcd6155 and below 77d55bc8675ee851ed639dc9be77325a8024cf67 is affected.
- Version 5a1436beec5744029f3ac90b6fe71a698dcd6155 and below 46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a is affected.
- Version 5a1436beec5744029f3ac90b6fe71a698dcd6155 and below 915b692e6cb723aac658c25eb82c58fd81235110 is affected.
- Version 2.6.34 is affected.
- Before 2.6.34 is unaffected.
- Version 6.6.140, <= 6.6.* is unaffected.
- Version 6.12.86, <= 6.12.* is unaffected.
- Version 6.18.27, <= 6.18.* is unaffected.
- Version 7.0.4, <= 7.0.* is unaffected.
- Version 7.1-rc1, <= * is unaffected.