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  4. CVE 2022 49611 x86speculation fill rsb on vmexit for ibrs
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Back to active CVEs
Medium · CVSS 5.5CVE-2022-49611

x86/speculation: Fill RSB on vmexit for IBRSCVE-2022-49611

Answer in brief

CVE-2022-49611 records a Medium severity (CVSS 5.5) vulnerability in x86/speculation: Fill RSB on vmexit for IBRS. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 26, 2025Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Nov 5, 2026Material review Nov 5, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
NVD-CWE-noinfo
Source
CVE List V5
Source checked
Nov 5, 2026
References
7 linked sources
Open source record

Key facts

Risk
Medium · CVSS 5.5
Exploitation
Not marked as known exploited
Affected software
9 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=b9cdaaf0a3becc52e8b4662fef28c452c4f009b4 <3d323b99ff5c8c57005184056d65f6af5b0479d8 || >=117cc7a908c83697b0b737d15ae1eb5943afe35b <f744b88dfc201bf8092833ec70b23c720188b527 || >=117cc7a908c83697b0b737d15ae1eb5943afe35b <17a9fc4a7b91f8599223631bb6ae6416bc0de1c0 || >=117cc7a908c83697b0b737d15ae1eb5943afe35b <4d7f72b6e1bc630bec7e4cd51814bc2b092bf153 || >=117cc7a908c83697b0b737d15ae1eb5943afe35b <8d5cff499a6d740c91ff37963907e0e983c37f0f || >=117cc7a908c83697b0b737d15ae1eb5943afe35b <8c38306e2e9257af4af2819aa287a4711ff36329 || >=117cc7a908c83697b0b737d15ae1eb5943afe35b <9756bba28470722dacb79ffce554336dd1f6a6cd || 68d1f7a3f1a35639a563bbad768d5df885b4ff05 || 20e080e2752d108388d386ecc0b33d7797dfb18f || eebc3f8adee0a6f43a4789ef0bf5c5b35de8cfe4 || c1ddd99a029636e234a800f28790a60d6ac0318f || >=4.14.14 <4.14.297 || >=3.2.101 <3.3 || >=3.16.56 <3.17 || >=4.4.113 <4.5 || >=4.9.77 <4.103d323b99ff5c8c57005184056d65f6af5b0479d8, f744b88dfc201bf8092833ec70b23c720188b527, 17a9fc4a7b91f8599223631bb6ae6416bc0de1c0, 4d7f72b6e1bc630bec7e4cd51814bc2b092bf153, 8d5cff499a6d740c91ff37963907e0e983c37f0f, 8c38306e2e9257af4af2819aa287a4711ff36329, 9756bba28470722dacb79ffce554336dd1f6a6cd, 4.14.297, 3.3, 3.17, 4.5, 4.10
Linux/Linuxgeneric4.15Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 3d323b99ff5c8c57005184056d65f6af5b0479d8 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Feb 26, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: x86/speculation: Fill RSB on vmexit for IBRS Prevent RSB underflow/poisoning attacks with RSB. While at it, add a bunch of comments to attempt to document the current state of tribal knowledge about RSB attacks and what exactly is being mitigated.

Quoted source text, attributed separately from HOL analysis.