CVE-2018-10756: Use-after-free in libtransmission/variant.c in Transmission before 3.00 allows remote attackers to cause a den

Q: How do I fix CVE-2018-10756?

transmission: upgrade to 3.00; debian linux: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2018-10756 being exploited?

CVE-2018-10756 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-10756 affect?

CVE-2018-10756 affects transmission, debian linux, fedora. Severity is high (CVSS 7.8). Use-after-free in libtransmission/variant.c in Transmission before 3.00 allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted torrent file.

Q: How urgent is CVE-2018-10756?

Priority 59/100. High severity; Public exploit reference; On your watchlist

This month

HIGH 7.8WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2018-10756 is a high-severity flaw (CVSS 7.8) affecting transmission, debian linux, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use-after-free in libtransmission/variant.c in Transmission before 3.00 allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted torrent file.

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.7% (top 14%)
CISA exploited list	No
Weakness	CWE-416
Published	2020-05-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · fedoraproject · transmissionbt

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-05-15 16:15 UTCPublished CVE record published
2026-06-17 01:34 UTCUpdated Record last modified

transmissionbt transmission UPGRADE

Affected: < 3.00

Fixed in: 3.00

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy transmission || rpm -q transmission || transmission --version

2. UPGRADE to 3.00 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade transmission

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade transmission

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 8.0 · 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

fedoraproject fedora MITIGATE

Affected: 31 · 32

Fixed in: no fixed release known

Safe to downgrade to: a release before 31

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-10756?

transmission: upgrade to 3.00; debian linux: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-10756 being exploited?

CVE-2018-10756 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-10756 affect?

CVE-2018-10756 affects transmission, debian linux, fedora. Severity is high (CVSS 7.8). Use-after-free in libtransmission/variant.c in Transmission before 3.00 allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted torrent file.

How urgent is CVE-2018-10756?

Priority 59/100. High severity; Public exploit reference; On your watchlist

Software pages

Debian vulnerabilities

References

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