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NVD / CVE Program· CNA Linux

CVE-2024-56766: mtd: rawnand: fix double free in atmel_pmecc_create_user()

HighCVSS 7.8 · v3.1—No exploit Fix available

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 1562871ef613fa9492aa0310933eff785166a90e, 3d825a241e65f7e3072978729e79d735ec40b80e, 4.20; azl3 kernel 6.6.64.2-9 on Azure Linux 3.0 6.6.76.1-1; azl3 kernel 6.6.76.1-1 on Azure Linux 3.0 6.6.76.1-1.

Low priority for now. Upgrade to Linux Linux 1562871ef613fa9492aa0310933eff785166a90e, 3d825a241e65f7e3072978729e79d735ec40b80e, 4.20; azl3 kernel 6.6.64.2-9 on Azure Linux 3.0 6.6.76.1-1; azl3 kernel 6.6.76.1-1 on Azure Linux 3.0 6.6.76.1-1 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: mtd: rawnand: fix double free in atmel_pmecc_create_user() The "user" pointer was converted from being allocated with kzalloc() to being allocated by devm_kzalloc(). Calling kfree(user) will lead to a double free.

Published
Jan 6, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 12th 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%

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

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Follow CVE-2024-56766

When you'll hear from us

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  • 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

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

    • 2014fcea19ec27df033359a0f42db0e8ed4290a8, bdd11a04d102f8310812aa7cec39545fdd6662d1affected
    • 22fbbc37edb840fd420fadf670366be9bf028426 and later · before ca9818554b0f33e87f38e4bfa2dac056692d46ccaffected · git
    • 54cb5fa850f9306d84e49a3db44b7a7eb5536cd1 and later · before 1562871ef613fa9492aa0310933eff785166a90eaffected · git
    • 5fe7709251e334cc27618473299c48340cecd3c8 and later · before 3d825a241e65f7e3072978729e79d735ec40b80eaffected · git
    • 24cbc37e837fd9e31e5024480b779207d1d99f1d and later · before 6ea15205d7e2b811fbbdf79783f686f58abfb4b7affected · git
    • f1290871c8aaeb13029390a2b6e5c05733a1be6f and later · before dd45c87782738715d5e7c167f8dabf0814a7394aaffected · git
    • 8ac19ec818c548c5788da5926dcc8af96fad4bb1 and later · before d2f090ea57f8d6587e09d4066f740a8617767b3daffected · git
    • 6d734f1bfc336aaea91313a5632f2f197608fadd and later · before d8e4771f99c0400a1873235704b28bb803c83d17affected · git
    • 4.19.325 and later · before 4.20affected · semver
    • 6.11.11 and later · before 6.12affected · semver
Affected versions · NVD (9)

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

  • linux linux kernel4.19.325 and later · before 4.20
  • linux linux kernel5.4.287 and later · before 5.5
  • linux linux kernel5.10.231 and later · before 5.11
  • linux linux kernel5.15.174 and later · before 5.16
  • linux linux kernel6.1.120 and later · before 6.1.123
  • linux linux kernel6.6.64 and later · before 6.6.69
  • linux linux kernel6.11.11 and later · before 6.12
  • linux linux kernel6.12.2 and later · before 6.12.8
  • linux linux kernel6.13

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.123-16.1.123-1
Debian:13linuxbefore 6.12.8-16.12.8-1

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-2024-56764Jan 6, 2025 · ublk: detach gendisk from ublk device if add_disk() fails
    31Monitor
  • ← EarlierCVE-2024-56765Jan 6, 2025 · powerpc/pseries/vas: Add close() callback in vas_vm_ops struct
    31Monitor
  • Later →CVE-2024-56767Jan 6, 2025 · dmaengine: at_xdmac: avoid null_prt_deref in at_xdmac_prep_dma_memset
    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 Linux1562871ef613fa9492aa0310933eff785166a90eVendor (CNA)
Linux Linux3d825a241e65f7e3072978729e79d735ec40b80eVendor (CNA)
Linux Linux4.20Vendor (CNA)
Linux Linux5.10.233Vendor (CNA)
Linux Linux5.15.176Vendor (CNA)
Linux Linux5.4.289Vendor (CNA)
Linux Linux6.1.123Vendor (CNA)
Linux Linux6.12Vendor (CNA)
Linux Linux6.12.8Vendor (CNA)
Linux Linux6.6.69Vendor (CNA)
Linux Linux6ea15205d7e2b811fbbdf79783f686f58abfb4b7Vendor (CNA)
Linux Linuxca9818554b0f33e87f38e4bfa2dac056692d46ccVendor (CNA)
Linux Linuxd2f090ea57f8d6587e09d4066f740a8617767b3dVendor (CNA)
Linux Linuxd8e4771f99c0400a1873235704b28bb803c83d17Vendor (CNA)
Linux Linuxdd45c87782738715d5e7c167f8dabf0814a7394aVendor (CNA)
azl3 kernel 6.6.64.2-9 on Azure Linux 3.06.6.76.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.76.1-1 on Azure Linux 3.06.6.76.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.176.3-1 on CBL Mariner 2.05.15.176.3-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.182.1-1 on CBL Mariner 2.0CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.182.1-1 on CBL-Mariner 2.05.15.176.3-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.123-1 · 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.

Variant candidates

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

  • CVE-2026-31608473 days apartsmb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()
    39Monitor
  • CVE-2026-31609473 days apartsmb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
    39Monitor
  • CVE-2026-43011480 days apartnet/x25: Fix potential double free of skb
    39Monitor
  • CVE-2026-43414487 days apartscsi: qla2xxx: Completely fix fcport double free
    39Monitor
  • CVE-2026-52993534 days aparttipc: fix double-free in tipc_buf_append()
    39Monitor
  • CVE-2024-35814234 days apartswiotlb: Fix double-allocation of slots due to broken alignment handling
    35Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

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.

References

Show all references (8 more)

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

All records