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NVD / CVE Program· CNA Linux

CVE-2022-49455: misc: ocxl: fix possible double free in ocxl_file_register_afu

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: 0.27% (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 252768d32e92c1214aeebb5fec0844ca479bcf5c, 8fb674216835e1f0c143762696d645facebb4685, 950cf957fe34d40d63dfa3bf3968210430b6491e.

Low priority for now. Upgrade to Linux Linux 252768d32e92c1214aeebb5fec0844ca479bcf5c, 8fb674216835e1f0c143762696d645facebb4685, 950cf957fe34d40d63dfa3bf3968210430b6491e 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: misc: ocxl: fix possible double free in ocxl_file_register_afu info_release() will be called in device_unregister() when info->dev's reference count is 0. So there is no need to call ocxl_afu_put() and kfree() again. Fix this by adding free_minor() and return to err_unregister error path.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 19th 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
total

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-2022-49455

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 kernel5.2 and later · before 5.4.198
  • linux linux kernel5.5 and later · before 5.10.121
  • linux linux kernel5.11 and later · before 5.15.46
  • linux linux kernel5.16 and later · before 5.17.14
  • linux linux kernel5.18 and later · before 5.18.3

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

    • 5.2affected
    • 75ca758adbafc81804c39b2c200ecdc819a6c042 and later · before de65c32ace9aa70d51facc61ba986607075e3a25affected · git
    • 75ca758adbafc81804c39b2c200ecdc819a6c042 and later · before ee89d8dee55ab4b3b8ad8b70866b2841ba334767affected · git
    • 75ca758adbafc81804c39b2c200ecdc819a6c042 and later · before 8fb674216835e1f0c143762696d645facebb4685affected · git
    • 75ca758adbafc81804c39b2c200ecdc819a6c042 and later · before 252768d32e92c1214aeebb5fec0844ca479bcf5caffected · git
    • 75ca758adbafc81804c39b2c200ecdc819a6c042 and later · before 9e9087cf34ee69f4e95d146ac29385d6e367a97baffected · git
    • 75ca758adbafc81804c39b2c200ecdc819a6c042 and later · before 950cf957fe34d40d63dfa3bf3968210430b6491eaffected · git
    • before 5.2not affected · semver
    • 5.4.198 and later · up to and including 5.4.*not affected · semver
    • 5.10.121 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.5-15.18.5-1

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-2022-49453Feb 26, 2025 · soc: ti: ti_sci_pm_domains: Check for null return of devm_kcalloc
    22Monitor
  • ← EarlierCVE-2022-49454Feb 26, 2025 · PCI: mediatek: Fix refcount leak in mtk_pcie_subsys_powerup()
    22Monitor
  • Later →CVE-2022-49456Feb 26, 2025 · bonding: fix missed rcu protection
    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 Linux252768d32e92c1214aeebb5fec0844ca479bcf5cVendor (CNA)
Linux Linux8fb674216835e1f0c143762696d645facebb4685Vendor (CNA)
Linux Linux950cf957fe34d40d63dfa3bf3968210430b6491eVendor (CNA)
Linux Linux9e9087cf34ee69f4e95d146ac29385d6e367a97bVendor (CNA)
Linux Linuxde65c32ace9aa70d51facc61ba986607075e3a25Vendor (CNA)
Linux Linuxee89d8dee55ab4b3b8ad8b70866b2841ba334767Vendor (CNA)
debian:linux5.18.5-1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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.

  • CVE-2026-31608422 days apartsmb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()
    39Monitor
  • CVE-2026-31609422 days apartsmb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
    39Monitor
  • CVE-2026-43011429 days apartnet/x25: Fix potential double free of skb
    39Monitor
  • CVE-2026-43414436 days apartscsi: qla2xxx: Completely fix fcport double free
    39Monitor
  • CVE-2026-52993483 days aparttipc: fix double-free in tipc_buf_append()
    39Monitor
  • CVE-2026-63888508 days apartscsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd()
    39Monitor

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-415 · Double Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 (5 more)

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

All records