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CVE-2023-52893· NVD / CVE Program· CNA Linux

gsmi: fix null-deref in gsmi_get_variable

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: 0.24% (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 32313c11bdc8a02c577abaf865be3664ab30410a, 6646d769fdb0ce4318ef9afd127f8526d1ca8393, a769b05eeed7accc4019a1ed9799dd72067f1ce8.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 32313c11bdc8a02c577abaf865be3664ab30410a, 6646d769fdb0ce4318ef9afd127f8526d1ca8393, a769b05eeed7accc4019a1ed9799dd72067f1ce8 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: gsmi: fix null-deref in gsmi_get_variable We can get EFI variables without fetching the attribute, so we must allow for that in gsmi. commit 859748255b43 ("efi: pstore: Omit efivars caching EFI varstore access layer") added a new get_variable call with attr=NULL, which triggers panic in gsmi.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Aug 21, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 14th 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 · 0.2%

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-2023-52893

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 kernel3.0 and later · before 4.14.304
  • linux linux kernel4.15 and later · before 4.19.271
  • linux linux kernel4.20 and later · before 5.4.230
  • linux linux kernel5.5 and later · before 5.10.165
  • linux linux kernel5.11 and later · before 5.15.90
  • linux linux kernel5.16 and later · before 6.1.8
  • linux linux kernel6.2

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

    • 3.0affected
    • 74c5b31c6618f01079212332b2e5f6c42f2d6307 and later · before ee5763ef829bd923033510de6d1df7c73f085e4baffected · git
    • 74c5b31c6618f01079212332b2e5f6c42f2d6307 and later · before 32313c11bdc8a02c577abaf865be3664ab30410aaffected · git
    • 74c5b31c6618f01079212332b2e5f6c42f2d6307 and later · before ffef77794fb5f1245c3249b86342bad2299accb5affected · git
    • 74c5b31c6618f01079212332b2e5f6c42f2d6307 and later · before ae2a9dcc8caa60b1e14671294e5ec902ea5d1dfdaffected · git
    • 74c5b31c6618f01079212332b2e5f6c42f2d6307 and later · before eb0421d90f916dffe96b4c049ddf01c0c50620d2affected · git
    • 74c5b31c6618f01079212332b2e5f6c42f2d6307 and later · before 6646d769fdb0ce4318ef9afd127f8526d1ca8393affected · git
    • 74c5b31c6618f01079212332b2e5f6c42f2d6307 and later · before a769b05eeed7accc4019a1ed9799dd72067f1ce8affected · git
    • before 3.0not affected · semver
    • 4.14.304 and later · up to and including 4.14.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.8-16.1.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-48898Aug 21, 2024 · drm/msm/dp: do not complete dp_aux_cmd_fifo_tx() if irq is not for aux transfer
    18Monitor
  • ← EarlierCVE-2022-48899Aug 21, 2024 · drm/virtio: Fix GEM handle creation UAF
    18Monitor
  • Later →CVE-2023-52894Aug 21, 2024 · usb: gadget: f_ncm: fix potential NULL ptr deref in ncm_bitrate()
    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 Linux32313c11bdc8a02c577abaf865be3664ab30410aVendor (CNA)
Linux Linux6646d769fdb0ce4318ef9afd127f8526d1ca8393Vendor (CNA)
Linux Linuxa769b05eeed7accc4019a1ed9799dd72067f1ce8Vendor (CNA)
Linux Linuxae2a9dcc8caa60b1e14671294e5ec902ea5d1dfdVendor (CNA)
Linux Linuxeb0421d90f916dffe96b4c049ddf01c0c50620d2Vendor (CNA)
Linux Linuxee5763ef829bd923033510de6d1df7c73f085e4bVendor (CNA)
Linux Linuxffef77794fb5f1245c3249b86342bad2299accb5Vendor (CNA)
debian:linux6.1.8-1 · 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.

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).

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
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-476 · NULL Pointer Dereference

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.

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