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NVD / CVE Program· CNA Linux

CVE-2024-26828: cifs: fix underflow in parse_server_interfaces()

Noroxi assessment

Priority: Monitor (action score 37/100)

  • 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: 0.75% (FIRST EPSS); higher than 55.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 3babdcb5f1809a9a41e31547a063dedf6bb44cca, 7190353835b4a219abb70f90b06cdcae97f11512, cffe487026be13eaf37ea28b783d9638ab147204.

Low priority for now. Upgrade to Linux Linux 3babdcb5f1809a9a41e31547a063dedf6bb44cca, 7190353835b4a219abb70f90b06cdcae97f11512, cffe487026be13eaf37ea28b783d9638ab147204 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: cifs: fix underflow in parse_server_interfaces() In this loop, we step through the buffer and after each item we check if the size_left is greater than the minimum size we need. However, the problem is that "bytes_left" is type ssize_t while sizeof() is type size_t. That means that because of type promotion, the comparison is done as an unsigned and if we have negative bytes left the loop continues instead of ending.

CriticalCVSS 9.4 · v3.1—No exploit Fix available
Published
Apr 17, 2024
Updated
Oct 30, 2026
EPSS
0.7% · 55th percentile

Report tools

JSON

Action score

37

Monitor

Low priority for now.

CVSS
37 / 40 · 9.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
9.4
NVD has not scored this yet; the score shown is the CNA’s.

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-2024-26828

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 kernel4.18 and later · before 6.1.79
  • linux linux kernel6.2 and later · before 6.6.18
  • linux linux kernel6.7 and later · before 6.7.6
  • linux linux kernel6.8

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

    • 4.18affected
    • fe856be475f7cf5ffcde57341d175ce9fd09434b and later · before 3babdcb5f1809a9a41e31547a063dedf6bb44ccaaffected · git
    • fe856be475f7cf5ffcde57341d175ce9fd09434b and later · before 7190353835b4a219abb70f90b06cdcae97f11512affected · git
    • fe856be475f7cf5ffcde57341d175ce9fd09434b and later · before f7ff1c89fb6e9610d2b01c1821727729e6609308affected · git
    • fe856be475f7cf5ffcde57341d175ce9fd09434b and later · before df2af9fdbc4ddde18a3371c4ca1a86596e8be301affected · git
    • fe856be475f7cf5ffcde57341d175ce9fd09434b and later · before cffe487026be13eaf37ea28b783d9638ab147204affected · git
    • before 4.18not affected · semver
    • 5.15.224 and later · up to and including 5.15.*not affected · semver
    • 6.1.79 and later · up to and including 6.1.*not affected · semver
    • 6.6.18 and later · up to and including 6.6.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9bpftoolbefore 7.3.0-427.31.1.el9_47.3.0-427.31.1.el9_4
AlmaLinux:9kernelbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64kbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-corebefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-debugbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-develbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-64k-modules-extrabefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-abi-stablelistsbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-corebefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-cross-headersbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-debugbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-debug-corebefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-debug-develbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-debug-devel-matchedbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4
AlmaLinux:9kernel-debug-modulesbefore 5.14.0-427.31.1.el9_45.14.0-427.31.1.el9_4

+96

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-2024-26909Apr 17, 2024 · soc: qcom: pmic_glink_altmode: fix drm bridge use-after-free
    22Monitor
  • ← EarlierCVE-2024-26820Apr 17, 2024 · hv_netvsc: Register VF in netvsc_probe if NET_DEVICE_REGISTER missed
    22Monitor
  • Later →CVE-2024-26835Apr 17, 2024 · netfilter: nf_tables: set dormant flag on hook register failure
    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 Linux3babdcb5f1809a9a41e31547a063dedf6bb44ccaVendor (CNA)
Linux Linux7190353835b4a219abb70f90b06cdcae97f11512Vendor (CNA)
Linux Linuxcffe487026be13eaf37ea28b783d9638ab147204Vendor (CNA)
Linux Linuxdf2af9fdbc4ddde18a3371c4ca1a86596e8be301Vendor (CNA)
Linux Linuxf7ff1c89fb6e9610d2b01c1821727729e6609308Vendor (CNA)
almalinux:bpftool7.3.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-427.31.1.el9_4 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.82-1 · Debian:12Package registry (OSV)
red hat:kernel-rt0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-core0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-core0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-debuginfo0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-devel0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-kvm0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules-core0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules-extra0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debuginfo0:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)
red hat:kernel-rt-debuginfo-common-x86_640:5.14.0-284.67.1.rt14.352.el9_2 · Red Hat:rhel_eus:9.2::nfvPackage registry (OSV)

+13

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-2024-269130 days apartdrm/amd/display: Fix dcn35 8k30 Underflow/Corruption Issue
    31Monitor
  • CVE-2024-46759154 days aparthwmon: (adc128d818) Fix underflows seen when writing limit attributes
    31Monitor
  • CVE-2024-53061216 days apartmedia: s5p-jpeg: prevent buffer overflows
    31Monitor
  • CVE-2024-056593 days apartKernel: cifs filesystem decryption improper input validation remote code execution vulnerability in function receive_encrypted_standard of client
    30Monitor
  • CVE-2022-49278315 days apartremoteproc: Fix count check in rproc_coredump_write()
    28Monitor
  • CVE-2022-4864311 days apartnetfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain()
    22Monitor

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

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
low · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
Low
Availability impact
High

Weakness class (CWE)

CWE-191 · Integer Underflow (Wrap or Wraparound)

CVSS vector

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

nvd-secondary

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 (4 more)

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

All records