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NVD / CVE Program· CNA Linux

CVE-2024-49853: firmware: arm_scmi: Fix double free in OPTEE transport

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: 0.21% (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 6699567b0bbb378600a4dc0a1f929439a4e84a2c, aef6ae124bb3cc12e34430fed91fbb7efd7a444d, d7f4fc2bc101e666da649605a9ece2bd42529c7a; Azure Linux 3.0 ARM 6.6.56.1-5; Azure Linux 3.0 x64 6.6.56.1-5.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 6699567b0bbb378600a4dc0a1f929439a4e84a2c, aef6ae124bb3cc12e34430fed91fbb7efd7a444d, d7f4fc2bc101e666da649605a9ece2bd42529c7a; Azure Linux 3.0 ARM 6.6.56.1-5; Azure Linux 3.0 x64 6.6.56.1-5 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: firmware: arm_scmi: Fix double free in OPTEE transport Channels can be shared between protocols, avoid freeing the same channel descriptors twice when unloading the stack.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Oct 21, 2024
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%

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-2024-49853

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 kernel5.18 and later · before 6.1.113
  • linux linux kernel6.2 and later · before 6.6.54
  • linux linux kernel6.7 and later · before 6.10.13
  • linux linux kernel6.11 and later · before 6.11.2

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

    • 5.18affected
    • 5f90f189a052f6fc46048f6ce29a37b709548b81 and later · before d7f4fc2bc101e666da649605a9ece2bd42529c7aaffected · git
    • 5f90f189a052f6fc46048f6ce29a37b709548b81 and later · before 6699567b0bbb378600a4dc0a1f929439a4e84a2caffected · git
    • 5f90f189a052f6fc46048f6ce29a37b709548b81 and later · before dc9543a4f2a5498a4a12d6d2427492a6f1a28056affected · git
    • 5f90f189a052f6fc46048f6ce29a37b709548b81 and later · before aef6ae124bb3cc12e34430fed91fbb7efd7a444daffected · git
    • 5f90f189a052f6fc46048f6ce29a37b709548b81 and later · before e98dba934b2fc587eafb83f47ad64d9053b18ae0affected · git
    • before 5.18not affected · semver
    • 6.1.113 and later · up to and including 6.1.*not affected · semver
    • 6.6.54 and later · up to and including 6.6.*not affected · semver
    • 6.10.13 and later · up to and including 6.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.115-16.1.115-1
Debian:13linuxbefore 6.11.2-16.11.2-1

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-2024-49850Oct 21, 2024 · bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos
    22Monitor
  • ← EarlierCVE-2024-49852Oct 21, 2024 · scsi: elx: libefc: Fix potential use after free in efc_nport_vport_del()
    31Monitor
  • Later →CVE-2024-49854Oct 21, 2024 · block, bfq: fix uaf for accessing waker_bfqq after splitting
    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 Linux6699567b0bbb378600a4dc0a1f929439a4e84a2cVendor (CNA)
Linux Linuxaef6ae124bb3cc12e34430fed91fbb7efd7a444dVendor (CNA)
Linux Linuxd7f4fc2bc101e666da649605a9ece2bd42529c7aVendor (CNA)
Linux Linuxdc9543a4f2a5498a4a12d6d2427492a6f1a28056Vendor (CNA)
Linux Linuxe98dba934b2fc587eafb83f47ad64d9053b18ae0Vendor (CNA)
Azure Linux 3.0 ARM6.6.56.1-5 · kernelMicrosoft (MSRC)
Azure Linux 3.0 x646.6.56.1-5 · kernelMicrosoft (MSRC)
debian:linux6.1.115-1 · 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.

  • CVE-2024-35814157 days apartswiotlb: Fix double-allocation of slots due to broken alignment handling
    35Monitor
  • CVE-2024-498820 days apartext4: fix double brelse() the buffer of the extents path
    31Monitor
  • CVE-2024-499830 days apartext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free
    31Monitor
  • CVE-2024-499890 days apartdrm/amd/display: fix double free issue during amdgpu module unload
    31Monitor
  • CVE-2024-500550 days apartdriver core: bus: Fix double free in driver API bus_register()
    31Monitor
  • CVE-2024-500717 days apartpinctrl: nuvoton: fix a double free in ma35_pinctrl_dt_node_to_map_func()
    31Monitor

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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