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NVD / CVE Program· CNA Linux

CVE-2023-52669: crypto: s390/aes - Fix buffer overread in CTR mode

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: 0.68% (FIRST EPSS); higher than 52.5% of all records.
  • 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 a7f580cdb42ec3d53bbb7c4e4335a98423703285, cd51e26a3b89706beec64f2d8296cfb1c34e0c79, d07f951903fa9922c375b8ab1ce81b18a0034e3b.

Low priority for now. Upgrade to Linux Linux a7f580cdb42ec3d53bbb7c4e4335a98423703285, cd51e26a3b89706beec64f2d8296cfb1c34e0c79, d07f951903fa9922c375b8ab1ce81b18a0034e3b 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: crypto: s390/aes - Fix buffer overread in CTR mode When processing the last block, the s390 ctr code will always read a whole block, even if there isn't a whole block of data left. Fix this by using the actual length left and copy it into a buffer first for processing.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 17, 2024
Updated
Aug 5, 2026
EPSS
0.6% · 52th 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 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.8
CNA · Linux
8.2
0.4 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2023-52669

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
debiandebian linux

Affected versions

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

  • debian debian linux10.0
  • linux linux kernel3.0 and later · before 5.10.210
  • linux linux kernel5.11 and later · before 5.15.149
  • linux linux kernel5.16 and later · before 6.1.76
  • linux linux kernel6.2 and later · before 6.6.15
  • linux linux kernel6.7 and later · before 6.7.3

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

    • 3.0affected
    • 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f and later · before cd51e26a3b89706beec64f2d8296cfb1c34e0c79affected · git
    • 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f and later · before a7f580cdb42ec3d53bbb7c4e4335a98423703285affected · git
    • 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f and later · before dbc9a791a70ea47be9f2acf251700fe254a2ab23affected · git
    • 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f and later · before d68ac38895e84446848b7647ab9458d54cacba3eaffected · git
    • 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f and later · before e78f1a43e72daf77705ad5b9946de66fc708b874affected · git
    • 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f and later · before d07f951903fa9922c375b8ab1ce81b18a0034e3baffected · git
    • before 3.0not affected · semver
    • 5.10.210 and later · up to and including 5.10.*not affected · semver
    • 5.15.149 and later · up to and including 5.15.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-toolsbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-tools-libsbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-tools-libs-develbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-zfcpdumpbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-zfcpdump-corebefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-zfcpdump-develbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-zfcpdump-modulesbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-zfcpdump-modules-extrabefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8perfbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10

+41

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-2023-52667May 17, 2024 · net/mlx5e: fix a potential double-free in fs_any_create_groups
    31Monitor
  • ← EarlierCVE-2023-52668May 17, 2024 · btrfs: zoned: fix lock ordering in btrfs_zone_activate()
    22Monitor
  • Later →CVE-2023-52670May 17, 2024 · rpmsg: virtio: Free driver_override when rpmsg_remove()
    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 Linuxa7f580cdb42ec3d53bbb7c4e4335a98423703285Vendor (CNA)
Linux Linuxcd51e26a3b89706beec64f2d8296cfb1c34e0c79Vendor (CNA)
Linux Linuxd07f951903fa9922c375b8ab1ce81b18a0034e3bVendor (CNA)
Linux Linuxd68ac38895e84446848b7647ab9458d54cacba3eVendor (CNA)
Linux Linuxdbc9a791a70ea47be9f2acf251700fe254a2ab23Vendor (CNA)
Linux Linuxe78f1a43e72daf77705ad5b9946de66fc708b874Vendor (CNA)
almalinux:bpftool4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-core4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.76-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules-extra0:4.18.0-553.8.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)

+5

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
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-787 · Out-of-bounds Write

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 (6 more)

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

All records