CVE-2025-49809
published 2025-07-04CVE-2025-49809: mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may…
PriorityP338high7.8CVSS 3.1
AVLACHPRLUINSCCHIHAH
EPSS
0.14%
3.9th percentile
mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect consequence of Homebrew not installing setuid binaries.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | mtr | — | — |
| msrc | azl3_mtr_0.95-2_on_azure_linux_3.0 | — | — |
| msrc | azl3_mtr_0.95-3_on_azure_linux_3.0 | — | — |
| mtr | mtr | <= 0.95 | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8LOW
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
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OSV
CVE-2025-49809: mtr through 0
osv·2025-07-04·CVSS 7.8
CVE-2025-49809 [HIGH] CVE-2025-49809: mtr through 0
mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect consequence of Homebrew not installing setuid binaries.
GHSA
GHSA-hvvx-vw37-6fjm: mtr through 0
ghsa_unreviewed·2025-07-04
CVE-2025-49809 [HIGH] CWE-829 GHSA-hvvx-vw37-6fjm: mtr through 0
mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect consequence of Homebrew not installing setuid binaries.
Microsoft
mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect conse
vendor_msrc·2025-07-08·CVSS 7.8
CVE-2025-49809 [HIGH] CWE-829 mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect conse
mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect consequence of Homebrew not installing setuid binaries.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to add
Red Hat
mtr: From CVEorg collector
vendor_redhat·2025-07-04·CVSS 7.8
CVE-2025-49809 [HIGH] CWE-829 mtr: From CVEorg collector
mtr: From CVEorg collector
mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect consequence of Homebrew not installing setuid binaries.
A possible privilege escalation flaw was found in the MTR networking tool. This issue occurs in rare cases when the package is configured to run with sudo rules instead of setuid and stems from its improper handling in the execution of a program specified by the MTR_PACKET environment variable.
Statement: The condition to exploit this vulnerability is not the default behavior on Linux systems and should rarely occur.
In Red Hat Enterprise Linux (RHEL), mtr does not rely on sudo or setuid for privilege elevation. I
Debian
CVE-2025-49809: mtr - mtr through 0.95, in certain privileged contexts, mishandles execution of a prog...
vendor_debian·2025·CVSS 7.8
CVE-2025-49809 [HIGH] CVE-2025-49809: mtr - mtr through 0.95, in certain privileged contexts, mishandles execution of a prog...
mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect consequence of Homebrew not installing setuid binaries.
Scope: local
bookworm: open
bullseye: open
forky: open
sid: open
trixie: open
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2025-49809 mtr: From CVEorg collector [fedora-42]
bugzilla·2025-07-04·CVSS 7.8
CVE-2025-49809 [HIGH] CVE-2025-49809 mtr: From CVEorg collector [fedora-42]
CVE-2025-49809 mtr: From CVEorg collector [fedora-42]
More information about this security flaw is available in the following bug:
https://bugzilla.redhat.com/show_bug.cgi?id=2376353
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish fo
Bugzilla
CVE-2025-49809 mtr: From CVEorg collector
bugzilla·2025-07-04·CVSS 7.8
CVE-2025-49809 [HIGH] CVE-2025-49809 mtr: From CVEorg collector
CVE-2025-49809 mtr: From CVEorg collector
mtr through 0.95, in certain privileged contexts, mishandles execution of a program specified by the MTR_PACKET environment variable. NOTE: mtr on macOS may often have Sudo rules, as an indirect consequence of Homebrew not installing setuid binaries.
Discussion:
Note that we have closed all RHEL trackers for this as NOTABUG because RHEL versions of mtr are not affected to begin with and proposed fix doesn't apply to mtr in RHEL context (i.e. no custom mtr sudo rules are needed).
2025-07-04
Published