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NVD / CVE Program· CNA Linux

CVE-2026-53213: drm/vc4: fix krealloc() memory leak

MediumCVSS 5.5 · v3.1—No exploit Fix available

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: 0.12% (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 02f5e4db57c0cdd7bac89d503b301a093a0fa95c, 30165a09f76eaf34951c818eb5d9d6e4771d76f6, 4fc692dc6df5bc777cc1bcebf95179e28594875f; azl3 kernel 6.6.141.1-1 on Azure Linux 3.0 6.6.143.1-1.

Low priority for now. Upgrade to Linux Linux 02f5e4db57c0cdd7bac89d503b301a093a0fa95c, 30165a09f76eaf34951c818eb5d9d6e4771d76f6, 4fc692dc6df5bc777cc1bcebf95179e28594875f; azl3 kernel 6.6.141.1-1 on Azure Linux 3.0 6.6.143.1-1 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: drm/vc4: fix krealloc() memory leak Don't just overwrite the original pointer passed to krealloc() with its return value without checking latter: MEM = krealloc(MEM, SZ, GFP); If krealloc() returns NULL, that erases the pointer to the still allocated memory, hence leaks this memory. Instead, use a temporary variable, check it's not NULL and only then assign it to the original pointer: TMP = krealloc(MEM, SZ, GFP); if (!TMP) return; MEM = TMP; While on it, use krealloc_array().

Published
Jun 25, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 2th percentile

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 · 0.1%

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-2026-53213

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

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

    • 4.8affected
    • 6d45c81d229d71da54d374143e7d6abad4c0cf31 and later · before 30165a09f76eaf34951c818eb5d9d6e4771d76f6affected · git
    • 6d45c81d229d71da54d374143e7d6abad4c0cf31 and later · before fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5faffected · git
    • 6d45c81d229d71da54d374143e7d6abad4c0cf31 and later · before e0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2eaffected · git
    • 6d45c81d229d71da54d374143e7d6abad4c0cf31 and later · before c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27affected · git
    • 6d45c81d229d71da54d374143e7d6abad4c0cf31 and later · before 02f5e4db57c0cdd7bac89d503b301a093a0fa95caffected · git
    • 6d45c81d229d71da54d374143e7d6abad4c0cf31 and later · before 4fc692dc6df5bc777cc1bcebf95179e28594875faffected · git
    • 6d45c81d229d71da54d374143e7d6abad4c0cf31 and later · before 5d563a5da8717629ae72f9eadf1e0e340bd1658baffected · git
    • before 4.8not affected · semver
    • 5.15.210 and later · up to and including 5.15.*not affected · semver
Affected versions · NVD (7)

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

  • linux linux kernel4.8 and later · before 5.15.210
  • linux linux kernel5.16 and later · before 6.1.176
  • linux linux kernel6.2 and later · before 6.6.143
  • linux linux kernel6.7 and later · before 6.12.94
  • linux linux kernel6.13 and later · before 6.18.36
  • linux linux kernel6.19 and later · before 7.0.13
  • linux linux kernel7.1

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.13-17.0.13-1

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-2026-53209Jun 25, 2026 · Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend
    31Monitor
  • ← EarlierCVE-2026-53212Jun 25, 2026 · netfilter: nft_tunnel: fix use-after-free on object destroy
    31Monitor
  • Later →CVE-2026-53215Jun 25, 2026 · net: mvpp2: refill RX buffers before XDP or skb use
    39Monitor

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 Linux02f5e4db57c0cdd7bac89d503b301a093a0fa95cVendor (CNA)
Linux Linux30165a09f76eaf34951c818eb5d9d6e4771d76f6Vendor (CNA)
Linux Linux4fc692dc6df5bc777cc1bcebf95179e28594875fVendor (CNA)
Linux Linux5d563a5da8717629ae72f9eadf1e0e340bd1658bVendor (CNA)
Linux Linuxc034aa0b1ba5f49cbdf8ef193d6ec714d74aac27Vendor (CNA)
Linux Linuxe0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2eVendor (CNA)
Linux Linuxfd87d6966041e33ef7d2e5dc59f9a52b71c6ae5fVendor (CNA)
azl3 kernel 6.6.141.1-1 on Azure Linux 3.06.6.143.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.176-1 · 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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · 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
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)

CWE-401 · Missing Release of Memory after Effective Lifetime

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.

References

Show all references (6 more)

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

All records