Skip to content
Noroxi
NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.28% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 17a9fc4a7b91f8599223631bb6ae6416bc0de1c0, 3.17, 3.3.

Low priority for now. Upgrade to Linux Linux 17a9fc4a7b91f8599223631bb6ae6416bc0de1c0, 3.17, 3.3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Nov 5, 2026
EPSS
0.2% · 21th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-49611

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelbefore 4.14.297
  • linux linux kernel4.15 and later · before 4.19.266
  • linux linux kernel4.20 and later · before 5.4.217
  • linux linux kernel5.5 and later · before 5.10.133
  • linux linux kernel5.11 and later · before 5.15.57
  • linux linux kernel5.16 and later · before 5.18.14
  • linux linux kernel5.19

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 68d1f7a3f1a35639a563bbad768d5df885b4ff05, 20e080e2752d108388d386ecc0b33d7797dfb18f, eebc3f8adee0a6f43a4789ef0bf5c5b35de8cfe4, c1ddd99a029636e234a800f28790a60d6ac0318f, 4.15affected
    • b9cdaaf0a3becc52e8b4662fef28c452c4f009b4 and later · before 3d323b99ff5c8c57005184056d65f6af5b0479d8affected · git
    • 117cc7a908c83697b0b737d15ae1eb5943afe35b and later · before f744b88dfc201bf8092833ec70b23c720188b527affected · git
    • 117cc7a908c83697b0b737d15ae1eb5943afe35b and later · before 17a9fc4a7b91f8599223631bb6ae6416bc0de1c0affected · git
    • 117cc7a908c83697b0b737d15ae1eb5943afe35b and later · before 4d7f72b6e1bc630bec7e4cd51814bc2b092bf153affected · git
    • 117cc7a908c83697b0b737d15ae1eb5943afe35b and later · before 8d5cff499a6d740c91ff37963907e0e983c37f0faffected · git
    • 117cc7a908c83697b0b737d15ae1eb5943afe35b and later · before 8c38306e2e9257af4af2819aa287a4711ff36329affected · git
    • 117cc7a908c83697b0b737d15ae1eb5943afe35b and later · before 9756bba28470722dacb79ffce554336dd1f6a6cdaffected · git
    • 4.14.14 and later · before 4.14.297affected · semver
    • 3.2.101 and later · before 3.3affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.14-15.18.14-1
Red Hat:enterprise_linux:8::baseosbpftoolbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernelbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-abi-stablelistsbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-corebefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-debugbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-debug-corebefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-debug-develbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-debug-modulesbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-debug-modules-extrabefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-aarch64before 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-ppc64lebefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-s390xbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-docbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-modulesbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-modules-extrabefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-toolsbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-tools-libsbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-zfcpdumpbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-zfcpdump-corebefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-zfcpdump-debuginfobefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-zfcpdump-develbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-zfcpdump-modulesbefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6
Red Hat:enterprise_linux:8::baseoskernel-zfcpdump-modules-extrabefore 0:4.18.0-372.32.1.el8_60:4.18.0-372.32.1.el8_6

+48

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-49556Feb 26, 2025 · KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak
    28Monitor
  • ← EarlierCVE-2022-49581Feb 26, 2025 · be2net: Fix buffer overflow in be_get_module_eeprom
    31Monitor
  • Later →CVE-2022-49612Feb 26, 2025 · power: supply: core: Fix boundary conditions in interpolation
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux17a9fc4a7b91f8599223631bb6ae6416bc0de1c0Vendor (CNA)
Linux Linux3.17Vendor (CNA)
Linux Linux3.3Vendor (CNA)
Linux Linux3d323b99ff5c8c57005184056d65f6af5b0479d8Vendor (CNA)
Linux Linux4.10Vendor (CNA)
Linux Linux4.14.297Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux4d7f72b6e1bc630bec7e4cd51814bc2b092bf153Vendor (CNA)
Linux Linux8c38306e2e9257af4af2819aa287a4711ff36329Vendor (CNA)
Linux Linux8d5cff499a6d740c91ff37963907e0e983c37f0fVendor (CNA)
Linux Linux9756bba28470722dacb79ffce554336dd1f6a6cdVendor (CNA)
Linux Linuxf744b88dfc201bf8092833ec70b23c720188b527Vendor (CNA)
debian:linux5.18.14-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-372.32.1.el8_6 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-372.32.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:kernel0:4.18.0-372.32.1.el8_6 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-372.32.1.el8_6 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-372.32.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:kernel-debuginfo0:4.18.0-372.32.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:kernel-debuginfo-common-x86_640:4.18.0-372.32.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:kernel-devel0:4.18.0-372.32.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:kernel-tools-debuginfo0:4.18.0-372.32.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:perf0:4.18.0-372.32.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:perf-debuginfo0:4.18.0-372.32.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)
red hat:python3-perf-debuginfo0:4.18.0-372.32.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records