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NVD / CVE Program· CNA Linux

CVE-2022-49710: dm mirror log: round up region bitmap size to BITS_PER_LONG

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 0d2209b54f1de0c2f99cab246d4cf2cfe24aaaa9, 85e123c27d5cbc22cfdc01de1e2ca1d9003a02d0, 9a02f3275acc628c0d956be771405ced79ac36df.

Low priority for now. Upgrade to Linux Linux 0d2209b54f1de0c2f99cab246d4cf2cfe24aaaa9, 85e123c27d5cbc22cfdc01de1e2ca1d9003a02d0, 9a02f3275acc628c0d956be771405ced79ac36df 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: dm mirror log: round up region bitmap size to BITS_PER_LONG The code in dm-log rounds up bitset_size to 32 bits. It then uses find_next_zero_bit_le on the allocated region. find_next_zero_bit_le accesses the bitmap using unsigned long pointers. So, on 64-bit architectures, it may access 4 bytes beyond the allocated size. Fix this bug by rounding up bitset_size to BITS_PER_LONG. This bug was found by running the lvm2 testsuite with kasan.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 20th 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%

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.

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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 kernel2.6.18 and later · before 5.4.200
  • linux linux kernel5.5 and later · before 5.10.124
  • linux linux kernel5.11 and later · before 5.15.49
  • linux linux kernel5.16 and later · before 5.18.6
  • 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

    • 2.6.18affected
    • 29121bd0b00ebb9524971a583fea4a2f7afe8041 and later · before ae460312875159285cef5bf3dc654593f404a1efaffected · git
    • 29121bd0b00ebb9524971a583fea4a2f7afe8041 and later · before ba751f0d25f07aa21ce9b85372a3792bf7969d13affected · git
    • 29121bd0b00ebb9524971a583fea4a2f7afe8041 and later · before 0d2209b54f1de0c2f99cab246d4cf2cfe24aaaa9affected · git
    • 29121bd0b00ebb9524971a583fea4a2f7afe8041 and later · before 9a02f3275acc628c0d956be771405ced79ac36dfaffected · git
    • 29121bd0b00ebb9524971a583fea4a2f7afe8041 and later · before 85e123c27d5cbc22cfdc01de1e2ca1d9003a02d0affected · git
    • before 2.6.18not affected · semver
    • 5.4.200 and later · up to and including 5.4.*not affected · semver
    • 5.10.124 and later · up to and including 5.10.*not affected · semver
    • 5.15.49 and later · up to and including 5.15.*not affected · 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

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-2022-49708Feb 26, 2025 · ext4: fix bug_on ext4_mb_use_inode_pa
    22Monitor
  • ← EarlierCVE-2022-49709Feb 26, 2025 · cfi: Fix __cfi_slowpath_diag RCU usage with cpuidle
    22Monitor
  • Later →CVE-2022-49711Feb 26, 2025 · bus: fsl-mc-bus: fix KASAN use-after-free in fsl_mc_bus_remove()
    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 Linux0d2209b54f1de0c2f99cab246d4cf2cfe24aaaa9Vendor (CNA)
Linux Linux85e123c27d5cbc22cfdc01de1e2ca1d9003a02d0Vendor (CNA)
Linux Linux9a02f3275acc628c0d956be771405ced79ac36dfVendor (CNA)
Linux Linuxae460312875159285cef5bf3dc654593f404a1efVendor (CNA)
Linux Linuxba751f0d25f07aa21ce9b85372a3792bf7969d13Vendor (CNA)
debian:linux5.18.14-1 · 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
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. Fix✗ → ✓

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

References

Show all references (4 more)

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

All records