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Fencer Vulns
medium 6.5

CVE-2026-109349 json

gix-pack before 0.75.0 Reachable Assertion DoS via Pack Version 3 Header

published 2026-10-12 28 d ago modified 2026-10-16 24 d ago also EUVD-2026-97651

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits
0
none known

Summary

gitoxide gix-pack before 0.75.0 contains a reachable assertion in BytesToEntriesIter::new_from_header: the pack header decoder accepts version 3, but a release-enabled assert_eq! requires version 2. A malicious remote can send a 12-byte pack header declaring version 3 to panic the client and abort the clone or fetch.

Patch / fix

  • GitoxideLabs gix-pack 0.75.0
  • rust hummingbird 1 1.99.1-1.1.hum1
  • cargo hummingbird 1 1.99.1-1.1.hum1
  • clippy hummingbird 1 1.99.1-1.1.hum1
  • rustfmt hummingbird 1 1.99.1-1.1.hum1
  • rust-gdb hummingbird 1 1.99.1-1.1.hum1
  • rust-src hummingbird 1 1.99.1-1.1.hum1
  • rust-lldb hummingbird 1 1.99.1-1.1.hum1
  • rust-analyzer hummingbird 1 1.99.1-1.1.hum1

red hat advisories RHSA-2026:83879RHSA-2026:83849

  • stgit openSUSE Leap 16.0 2.7.0-bp160.1.1
  • stgit openSUSE Tumbleweed 2.7.0-1.1
  • grok-build openSUSE Leap 16.0 1.0.45+git20260929.2bdd1d6-bp160.2.1
  • grok-build openSUSE Tumbleweed 1.0.45+git20260929.2bdd1d6-2.1
  • openai-codex openSUSE Tumbleweed 0.162.1-2.1

opensuse advisories openSUSE-SU-2026:22204-1openSUSE-SU-2026:12223-1openSUSE-SU-2026:22130-1openSUSE-SU-2026:12141-1openSUSE-SU-2026:12144-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-109349 updated cvss 6.5

gix-pack: gix-pack: Denial of Service via crafted pack header

  • Red Hat Enterprise Linux 8 rls, rust, cargo, clippy, rustfmt, rust-gdb, +8 more Red Hat Enterprise Linux 9 rust, cargo, clippy, rustfmt, rust-gdb, rust-src, +9 more Red Hat Enterprise Linux 10 igvm 0.4.0-3.el10, rust 1.98.1-1.el10
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images rust 1.99.0-1.1.hum1, rust 1.99.1-1.1.hum1, cargo 1.99.0-1.1.hum1, cargo 1.99.1-1.1.hum1, clippy 1.99.0-1.1.hum1, clippy 1.99.1-1.1.hum1, +28 more
    fixed: vendor fix RHSA-2026:83849

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
27 d ago

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • GitoxideLabs gix-pack

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.