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ReviewHigh

CVE-2026-74578

Linux

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_skcipher - force synchronous processing on trees without ctx->state The AIO/async path in skcipher_recvmsg() passes the socket-wide ctx->iv directly into the skcipher request. After io_submit() the socket lock is dropped and the request is processed asynchronously, so a concurrent sendmsg(ALG_SET_IV) can overwrite ctx->iv and make the in-flight request run under an attacker-controlled IV. For CTR/stream modes this is IV/keystream reuse and lets an unprivileged user recover the plaintext of a concurrent operati...

CVSS
7.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.08.16
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_skcipher - force synchronous processing on trees without ctx->state The AIO/async path in skcipher_recvmsg() passes the socket-wide ctx->iv directly into the skcipher request. After io_submit() the socket lock is dropped and the request is processed asynchronously, so a concurrent sendmsg(ALG_SET_IV) can overwrite ctx->iv and make the in-flight request run under an attacker-controlled IV. For CTR/stream modes this is IV/keystream reuse and lets an unprivileged user recover the plaintext of a concurrent operati...

Affected product and versions

Product
Linux
Affected versions
>= e870456d8e7c8d57c059ea479b5aadbb55ff4c3a < bf09b0be8e851f050e98da702d247c14d81b591a, >= e870456d8e7c8d57c059ea479b5aadbb55ff4c3a < 73dd3bf704ca6c20639de70c08e9a10bee904a95, >= e870456d8e7c8d57c059ea479b5aadbb55ff4c3a < f1a87ca0843d74482402a206ea2dfb315ee9acbd, >= e870456d8e7c8d57c059ea479b5aadbb55ff4c3a < 7b91e51d0eb7cbb07f7f086f9176bd93dbbc85dd, >= e870456d8e7c8d57c059ea479b5aadbb55ff4c3a < 60eafc7b08c6689ea3ad39eff8d97aefc8a087c7, >= e870456d8e7c8d57c059ea479b5aadbb55ff4c3a < d7860b682da55433b5da0591b0e4c1982ecd2689, >= e870456d8e7c8d57c059ea479b5aadbb55ff4c3a < b05defc41b27c7d0c05c45f67bf5b91c28f93669, >= e870456d8e7c8d57c059ea479b5aadbb55ff4c3a < fcc77d33a34cf271702e8daafb6c593e4626776d, >= 4.14
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE
Not available