by Kastro
Paper/Archive/CVE-2026-43493

CVE-2026-43493

Linux Linux — crypto: pcrypt - Fix handling of MAY_BACKLOG requests

EPSS 0.7%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 52.3.523 × 2010.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Linux5a1436beec5744029f3ac90b6fe71a698dcd6155 – < ae7e95638d956d556d74b9abb9e780d3bd3dcd9eae7e95638d956d556d74b9abb9e780d3bd3dcd9eCNA
Linux5a1436beec5744029f3ac90b6fe71a698dcd6155 – < 1d7f07df450bac3301938fbc4251f2611be4084e1d7f07df450bac3301938fbc4251f2611be4084eCNA
Linux5a1436beec5744029f3ac90b6fe71a698dcd6155 – < 76641449b28979ebd6c02e9598367e119e38523676641449b28979ebd6c02e9598367e119e385236CNA
Linux5a1436beec5744029f3ac90b6fe71a698dcd6155 – < 9f1cbca178c03188e201ed175251372149bb25f29f1cbca178c03188e201ed175251372149bb25f2CNA
Linux5a1436beec5744029f3ac90b6fe71a698dcd6155 – < eb34e243df57e32f4c08fa191f3602ea19076276eb34e243df57e32f4c08fa191f3602ea19076276CNA
Linux5a1436beec5744029f3ac90b6fe71a698dcd6155 – < 77d55bc8675ee851ed639dc9be77325a8024cf6777d55bc8675ee851ed639dc9be77325a8024cf67CNA
Linux5a1436beec5744029f3ac90b6fe71a698dcd6155 – < 46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a46271895ddfb1ba41f89f7e0dffbe9c2bcf7380aCNA
Linux5a1436beec5744029f3ac90b6fe71a698dcd6155 – < 915b692e6cb723aac658c25eb82c58fd81235110915b692e6cb723aac658c25eb82c58fd81235110CNA
Linux2.6.34–CNA
SIMATIC S7-1500 TM MFP - GNU/Linux subsystemall versions–siemens-SADP

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgit.kernel.org/stable/c/ae7e95638d956d556d74b9abb9e780d3bd3dcd9erefgit.kernel.org/stable/c/1d7f07df450bac3301938fbc4251f2611be4084erefgit.kernel.org/stable/c/76641449b28979ebd6c02e9598367e119e385236refgit.kernel.org/stable/c/9f1cbca178c03188e201ed175251372149bb25f2refgit.kernel.org/stable/c/eb34e243df57e32f4c08fa191f3602ea19076276refgit.kernel.org/stable/c/77d55bc8675ee851ed639dc9be77325a8024cf67refgit.kernel.org/stable/c/46271895ddfb1ba41f89f7e0dffbe9c2bcf7380arefgit.kernel.org/stable/c/915b692e6cb723aac658c25eb82c58fd81235110refcert-portal.siemens.com/productcert/html/ssa-784472.html