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NVD / CVE Program· CNA Linux

CVE-2022-49811: drbd: use after free in drbd_create_device()

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.22% (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 7d93417d596402ddd46bd76c721f205d09d0d025, 813a8dd9c45fd46f5cbbfbedf0791afa7740ccf5, 9ed51414aef6e59e832e2960f10766dce2d5b1a1.

Low priority for now. Upgrade to Linux Linux 7d93417d596402ddd46bd76c721f205d09d0d025, 813a8dd9c45fd46f5cbbfbedf0791afa7740ccf5, 9ed51414aef6e59e832e2960f10766dce2d5b1a1 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: drbd: use after free in drbd_create_device() The drbd_destroy_connection() frees the "connection" so use the _safe() iterator to prevent a use after free.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 1, 2025
Updated
Nov 5, 2026
EPSS
0.2% · 13th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 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-2022-49811

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

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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.

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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 kernel3.15 and later · before 4.14.300
  • linux linux kernel4.15 and later · before 4.19.267
  • linux linux kernel4.20 and later · before 5.4.225
  • linux linux kernel5.5 and later · before 5.10.156
  • linux linux kernel5.11 and later · before 5.15.80
  • linux linux kernel5.16 and later · before 6.0.10
  • linux linux kernel6.1

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

    • 3.15affected
    • b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 and later · before fc1897f16ebcfd22364f2afcc27f53a740f3bc7aaffected · git
    • b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 and later · before bf47ca1b35fc1f55091ffaff5fbe41ea0c6f59a1affected · git
    • b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 and later · before 813a8dd9c45fd46f5cbbfbedf0791afa7740ccf5affected · git
    • b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 and later · before 9ed51414aef6e59e832e2960f10766dce2d5b1a1affected · git
    • b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 and later · before 7d93417d596402ddd46bd76c721f205d09d0d025affected · git
    • b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 and later · before c2a00b149836d60c222930bbea6b2139caf34d4faffected · git
    • b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 and later · before a7a1598189228b5007369a9622ccdf587be0730faffected · git
    • before 3.15not affected · semver
    • 4.14.300 and later · up to and including 4.14.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.10-16.0.10-1

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-2022-49807May 1, 2025 · nvmet: fix a memory leak in nvmet_auth_set_key
    22Monitor
  • ← EarlierCVE-2022-49810May 1, 2025 · netfs: Fix missing xas_retry() calls in xarray iteration
    22Monitor
  • Later →CVE-2022-49812May 1, 2025 · bridge: switchdev: Fix memory leaks when changing VLAN protocol
    22Monitor

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 Linux7d93417d596402ddd46bd76c721f205d09d0d025Vendor (CNA)
Linux Linux813a8dd9c45fd46f5cbbfbedf0791afa7740ccf5Vendor (CNA)
Linux Linux9ed51414aef6e59e832e2960f10766dce2d5b1a1Vendor (CNA)
Linux Linuxa7a1598189228b5007369a9622ccdf587be0730fVendor (CNA)
Linux Linuxbf47ca1b35fc1f55091ffaff5fbe41ea0c6f59a1Vendor (CNA)
Linux Linuxc2a00b149836d60c222930bbea6b2139caf34d4fVendor (CNA)
Linux Linuxfc1897f16ebcfd22364f2afcc27f53a740f3bc7aVendor (CNA)
debian:linux6.0.10-1 · Debian:12Package 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
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

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

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
free(dev->buf);/* ... another thread is still running ... */process(dev->buf);

Fixed

c
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&dev->lock);

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