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NVD / CVE Program· CNA mitre

CVE-2024-56431: oc_huff_tree_unpack in huffdec.c in libtheora in Theora through 1.0 7180717 has an invalid negative left shift.

CriticalCVSS 9.8 · v3.1—Proof of concept Fix available

Noroxi assessment

Priority: Plan (action score 40/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.8% (FIRST EPSS); higher than 79.2% 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.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: libtheora (Debian:13) 1.2.0~alpha1+dfsg-6; mozjs102 (openSUSE:Leap 15.6) 102.15.1-bp156.3.3.1; mozjs115 (openSUSE:Leap 15.6) 115.4.0-150600.3.9.1.

Add it to your regular patch cycle. Upgrade to libtheora (Debian:13) 1.2.0~alpha1+dfsg-6; mozjs102 (openSUSE:Leap 15.6) 102.15.1-bp156.3.3.1; mozjs115 (openSUSE:Leap 15.6) 115.4.0-150600.3.9.1 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

oc_huff_tree_unpack in huffdec.c in libtheora in Theora through 1.0 7180717 has an invalid negative left shift. NOTE: this is disputed by third parties because there is no evidence of a security impact, e.g., an application would not crash.

Published
Dec 25, 2024
Updated
Jun 17, 2026
EPSS
1.8% · 79th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.8%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-56431

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
xiphtheora

Affected versions

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

  • xiph theorabefore 1.2.0

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:13libtheorabefore 1.2.0~alpha1+dfsg-61.2.0~alpha1+dfsg-6
openSUSE:Leap 15.6mozjs102before 102.15.1-bp156.3.3.1102.15.1-bp156.3.3.1
openSUSE:Leap 15.6mozjs115before 115.4.0-150600.3.9.1115.4.0-150600.3.9.1
openSUSE:Leap 15.6mozjs52before 52.6.0-150000.3.6.152.6.0-150000.3.6.1
openSUSE:Leap 15.6mozjs60before 60.9.0-150200.6.3.160.9.0-150200.6.3.1
openSUSE:Leap 15.6mozjs78before 78.15.0-150400.3.14.178.15.0-150400.3.14.1
openSUSE:Tumbleweedlibtheorabefore 1.2.0-1.11.2.0-1.1
openSUSE:Tumbleweedmozjs115before 115.15.0-5.1115.15.0-5.1
openSUSE:Tumbleweedmozjs128before 128.9.0-2.1128.9.0-2.1
SUSE:Linux Enterprise Micro 5.3mozjs60before 60.9.0-150200.6.3.160.9.0-150200.6.3.1
SUSE:Linux Enterprise Module for Desktop Applications 15 SP6mozjs115before 115.4.0-150600.3.9.1115.4.0-150600.3.9.1
SUSE:Linux Enterprise Module for Package Hub 15 SP6mozjs52before 52.6.0-150000.3.6.152.6.0-150000.3.6.1
SUSE:Linux Enterprise Module for Package Hub 15 SP6mozjs78before 78.15.0-150400.3.14.178.15.0-150400.3.14.1
SUSE:Package Hub 15 SP6mozjs102before 102.15.1-bp156.3.3.1102.15.1-bp156.3.3.1

Same product

xiph: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-5673Libtheora: libtheora: denial of service or information disclosure via malformed avi file processing
    28Monitor

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
debian:libtheora1.2.0~alpha1+dfsg-6 · Debian:13Package registry (OSV)
opensuse:libtheora1.2.0-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:mozjs102102.15.1-bp156.3.3.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:mozjs115115.4.0-150600.3.9.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:mozjs128128.9.0-2.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:mozjs5252.6.0-150000.3.6.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:mozjs6060.9.0-150200.6.3.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:mozjs7878.15.0-150400.3.14.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:mozjs102102.15.1-bp156.3.3.1 · SUSE:Package Hub 15 SP6Package registry (OSV)
suse:mozjs115115.4.0-150600.3.9.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP6Package registry (OSV)
suse:mozjs5252.6.0-150000.3.6.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP6Package registry (OSV)
suse:mozjs6060.9.0-150200.6.3.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)
suse:mozjs7878.15.0-150400.3.14.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP6Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:12024-12-25

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.

  1. First PoC-1 d
  2. Published
  3. TodayNov 12, 2026+687 d

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

  • 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
high · 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
High
Availability impact
High

Weakness class (CWE)

CWE-863 · Incorrect Authorization

CVSS vector

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

References

Show all references (4 more)

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

All records