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NVD / CVE Program· CNA Linux

CVE-2022-49870: capabilities: fix undefined behavior in bit shift for CAP_TO_MASK

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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 151dc8087b5609e53b069c068e3f3ee100efa586, 27bdb134c043ff32c459d98f16550d0ffa0b3c34, 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13.

Low priority for now. Upgrade to Linux Linux 151dc8087b5609e53b069c068e3f3ee100efa586, 27bdb134c043ff32c459d98f16550d0ffa0b3c34, 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13 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: capabilities: fix undefined behavior in bit shift for CAP_TO_MASK Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below: UBSAN: shift-out-of-bounds in security/commoncap.c:1252:2 left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> dump_stack_lvl+0x7d/0xa5 dump_stack+0x15/0x1b ubsan_epilogue+0xe/0x4e __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c cap_task_prctl+0x561/0x6f0 security_task_prctl+0x5a/0xb0 __x64_sys_prctl+0x61/0x8f0 do_syscall_64+0x58/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK>

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
May 1, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 12th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 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 kernel2.6.25 and later · before 4.9.334
  • linux linux kernel4.10 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 5.10.155
  • linux linux kernel5.11 and later · before 5.15.79
  • linux linux kernel5.16 and later · before 6.0.9
  • 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

    • 2.6.25affected
    • e338d263a76af78fe8f38a72131188b58fceb591 and later · before 5b79fa628e2ab789e629a83cd211ef9b4c1a593eaffected · git
    • e338d263a76af78fe8f38a72131188b58fceb591 and later · before 65b0bc7a0690861812ade523d19f82688ab819dcaffected · git
    • e338d263a76af78fe8f38a72131188b58fceb591 and later · before dbaab08c8677d598244d21afb7818e44e1c5d826affected · git
    • e338d263a76af78fe8f38a72131188b58fceb591 and later · before 5661f111a1616ac105ec8cec81bff99b60f847acaffected · git
    • e338d263a76af78fe8f38a72131188b58fceb591 and later · before fcbd2b336834bd24e1d9454ad5737856470c10d7affected · git
    • e338d263a76af78fe8f38a72131188b58fceb591 and later · before 151dc8087b5609e53b069c068e3f3ee100efa586affected · git
    • e338d263a76af78fe8f38a72131188b58fceb591 and later · before 27bdb134c043ff32c459d98f16550d0ffa0b3c34affected · git
    • e338d263a76af78fe8f38a72131188b58fceb591 and later · before 46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13affected · git
    • before 2.6.25not 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-2022-49868May 1, 2025 · phy: ralink: mt7621-pci: add sentinel to quirks table
    22Monitor
  • ← EarlierCVE-2022-49869May 1, 2025 · bnxt_en: Fix possible crash in bnxt_hwrm_set_coal()
    22Monitor
  • Later →CVE-2022-49871May 1, 2025 · net: tun: Fix memory leaks of napi_get_frags
    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 Linux151dc8087b5609e53b069c068e3f3ee100efa586Vendor (CNA)
Linux Linux27bdb134c043ff32c459d98f16550d0ffa0b3c34Vendor (CNA)
Linux Linux46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13Vendor (CNA)
Linux Linux5661f111a1616ac105ec8cec81bff99b60f847acVendor (CNA)
Linux Linux5b79fa628e2ab789e629a83cd211ef9b4c1a593eVendor (CNA)
Linux Linux65b0bc7a0690861812ade523d19f82688ab819dcVendor (CNA)
Linux Linuxdbaab08c8677d598244d21afb7818e44e1c5d826Vendor (CNA)
Linux Linuxfcbd2b336834bd24e1d9454ad5737856470c10d7Vendor (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
none
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
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records