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Fencer Vulns
high 8.8

CVE-2026-84268 json

Gvfs: sftp: heap-based buffer overflow in read_reply()

published 2026-09-01 2 mo ago modified 2026-11-05 4 d ago also EUVD-2026-69287

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

A flaw was found in the SFTP backend in gvfs. When mounting a share and reading a file, a malicious SFTP server can cause read_reply() to process a length that exceeds the size requested by the client. The function does not verify the server-provided length against the allocated buffer size, causing the operation to write past the intended boundaries. This issue allows a malicious server to corrupt adjacent heap memory in the gvfsd-sftp process, resulting in a denial of service as the process aborts upon detecting the heap corruption or potentially allowing arbitrary code execution.

Patch / fix

  • GNOME gvfs 1.60.2
  • Red Hat Red Hat Enterprise Linux 10 0:1.54.4-4.el10_2.1
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.54.4-2.el10_0.2
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.36.2-7.el7_9.1
  • Red Hat Red Hat Enterprise Linux 8 0:1.36.2-22.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.36.2-11.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:1.36.2-11.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:1.36.2-11.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:1.36.2-11.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:1.36.2-14.el8_8.1
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:1.36.2-14.el8_8.1
  • Red Hat Red Hat Enterprise Linux 9 0:1.48.1-8.el9_8.1
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.48.1-4.el9_2.1
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:1.48.1-4.el9_4.1
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.48.1-6.el9_6.1
  • gvfs Debian 14 1.62.0-1

debian advisories DEBIAN-CVE-2026-84268

  • gvfs Ubuntu 22.04 LTS 1.48.2-0ubuntu1.2
  • gvfs Ubuntu 24.04 LTS 1.54.4-0ubuntu1~24.04.4
  • gvfs Ubuntu 26.04 LTS 1.60.0-1ubuntu0.1
  • gvfs Ubuntu Pro 16.04 LTS 1.28.2-1ubuntu1~16.04.3+esm1
  • gvfs Ubuntu Pro 18.04 LTS 1.36.1-0ubuntu1.3.3+esm1
  • gvfs Ubuntu Pro 20.04 LTS 1.44.1-1ubuntu1.2+esm1

ubuntu advisories UBUNTU-CVE-2026-84268

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gvfs RHEL 9 1.48.1-8.el9_8.1
  • gvfs-goa RHEL 9 1.48.1-8.el9_8.1
  • gvfs-mtp RHEL 9 1.48.1-8.el9_8.1
  • gvfs-smb RHEL 9 1.48.1-8.el9_8.1
  • gvfs-fuse RHEL 9 1.48.1-8.el9_8.1
  • gvfs-client RHEL 9 1.48.1-8.el9_8.1
  • gvfs-gphoto2 RHEL 9 1.48.1-8.el9_8.1
  • gvfs RHEL 10.2 1.54.4-4.el10_2.1

red hat advisories RHSA-2026:74370RHSA-2026:73998RHSA-2026:73997

  • gvfs SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Desktop Applications 15 SP7 1.52.2-150600.3.9.1
  • gvfs SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.48.2-150400.4.15.1
  • gvfs SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.28.3-18.12.1

suse advisories SUSE-SU-2026:4240-1SUSE-SU-2026:4238-1SUSE-SU-2026:4200-1

  • gvfs openSUSE Leap 16.0 1.59.90-160000.3.1
  • gvfs openSUSE Tumbleweed 1.60.3-1.1

opensuse advisories openSUSE-SU-2026:21875-1openSUSE-SU-2026:11788-1

  • gvfs AlmaLinux 9 1.48.1-8.el9_8.1
  • gvfs-goa AlmaLinux 9 1.48.1-8.el9_8.1
  • gvfs-mtp AlmaLinux 9 1.48.1-8.el9_8.1
  • gvfs-smb AlmaLinux 9 1.48.1-8.el9_8.1
  • gvfs-fuse AlmaLinux 9 1.48.1-8.el9_8.1
  • gvfs-client AlmaLinux 9 1.48.1-8.el9_8.1
  • gvfs-gphoto2 AlmaLinux 9 1.48.1-8.el9_8.1
  • gvfs AlmaLinux 8 1.36.2-22.el8_10

almalinux advisories ALSA-2026:74370ALSA-2026:73997ALSA-2026:73998

  • gvfs Rocky Linux 9 1.48.1-8.el9_8.1
  • gvfs Rocky Linux 10 1.54.4-4.el10_2.1
  • gvfs Rocky Linux 8 1.36.2-22.el8_10

rocky linux advisories RLSA-2026:74370RLSA-2026:73998RLSA-2026:73997

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-2026-84268 updated cvss 8.8

gvfs: SFTP: heap-based buffer overflow in read_reply()

  • Red Hat Enterprise Linux 6 gvfs-afc, gvfs-smb, gvfs-fuse, gvfs-archive, gvfs-gphoto2, gvfs-obexftp, +1 more
    affected: workaround, no fix planned “To mitigate this vulnerability, do not connect to untrusted SFTP servers.”
  • Red Hat CodeReady Linux Builder EUS (v.9.6) gvfs 1.48.1-6.el9_6.1
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85939
  • Red Hat Enterprise Linux AppStream (v. 8) gvfs 1.36.2-22.el8_10, gvfs-afc 1.36.2-22.el8_10, gvfs-afp 1.36.2-22.el8_10, gvfs-goa 1.36.2-22.el8_10, gvfs-mtp 1.36.2-22.el8_10, gvfs-smb 1.36.2-22.el8_10, +4 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:73997
  • Red Hat Enterprise Linux AppStream (v. 9) gvfs 1.48.1-8.el9_8.1, gvfs-goa 1.48.1-8.el9_8.1, gvfs-mtp 1.48.1-8.el9_8.1, gvfs-smb 1.48.1-8.el9_8.1, gvfs-fuse 1.48.1-8.el9_8.1, gvfs-client 1.48.1-8.el9_8.1, +1 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:74370
  • Red Hat Enterprise Linux AppStream (v. 10) gvfs 1.54.4-4.el10_2.1, gvfs-goa 1.54.4-4.el10_2.1, gvfs-mtp 1.54.4-4.el10_2.1, gvfs-smb 1.54.4-4.el10_2.1, gvfs-fuse 1.54.4-4.el10_2.1, gvfs-client 1.54.4-4.el10_2.1, +1 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:73998
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) gvfs 1.36.2-11.el8_4.1, gvfs-afc 1.36.2-11.el8_4.1, gvfs-afp 1.36.2-11.el8_4.1, gvfs-goa 1.36.2-11.el8_4.1, gvfs-mtp 1.36.2-11.el8_4.1, gvfs-smb 1.36.2-11.el8_4.1, +4 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85945
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) gvfs 1.36.2-11.el8_6.1, gvfs-afc 1.36.2-11.el8_6.1, gvfs-afp 1.36.2-11.el8_6.1, gvfs-goa 1.36.2-11.el8_6.1, gvfs-mtp 1.36.2-11.el8_6.1, gvfs-smb 1.36.2-11.el8_6.1, +4 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85943
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) gvfs 1.36.2-14.el8_8.1, gvfs-afc 1.36.2-14.el8_8.1, gvfs-afp 1.36.2-14.el8_8.1, gvfs-goa 1.36.2-14.el8_8.1, gvfs-mtp 1.36.2-14.el8_8.1, gvfs-smb 1.36.2-14.el8_8.1, +4 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85940
show 10 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) gvfs 1.48.1-4.el9_2.1, gvfs-goa 1.48.1-4.el9_2.1, gvfs-mtp 1.48.1-4.el9_2.1, gvfs-smb 1.48.1-4.el9_2.1, gvfs-fuse 1.48.1-4.el9_2.1, gvfs-client 1.48.1-4.el9_2.1, +1 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85942
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) gvfs 1.48.1-4.el9_4.1, gvfs-goa 1.48.1-4.el9_4.1, gvfs-mtp 1.48.1-4.el9_4.1, gvfs-smb 1.48.1-4.el9_4.1, gvfs-fuse 1.48.1-4.el9_4.1, gvfs-client 1.48.1-4.el9_4.1, +1 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85944
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) gvfs 1.54.4-2.el10_0.2, gvfs-goa 1.54.4-2.el10_0.2, gvfs-mtp 1.54.4-2.el10_0.2, gvfs-smb 1.54.4-2.el10_0.2, gvfs-fuse 1.54.4-2.el10_0.2, gvfs-client 1.54.4-2.el10_0.2, +1 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85941
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) gvfs 1.48.1-6.el9_6.1, gvfs-goa 1.48.1-6.el9_6.1, gvfs-mtp 1.48.1-6.el9_6.1, gvfs-smb 1.48.1-6.el9_6.1, gvfs-fuse 1.48.1-6.el9_6.1, gvfs-client 1.48.1-6.el9_6.1, +1 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85939
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) gvfs 1.36.2-11.el8_4.1, gvfs-afc 1.36.2-11.el8_4.1, gvfs-afp 1.36.2-11.el8_4.1, gvfs-goa 1.36.2-11.el8_4.1, gvfs-mtp 1.36.2-11.el8_4.1, gvfs-smb 1.36.2-11.el8_4.1, +4 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85945
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) gvfs 1.36.2-11.el8_6.1, gvfs-afc 1.36.2-11.el8_6.1, gvfs-afp 1.36.2-11.el8_6.1, gvfs-goa 1.36.2-11.el8_6.1, gvfs-mtp 1.36.2-11.el8_6.1, gvfs-smb 1.36.2-11.el8_6.1, +4 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85943
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) gvfs 1.36.2-14.el8_8.1, gvfs-afc 1.36.2-14.el8_8.1, gvfs-afp 1.36.2-14.el8_8.1, gvfs-goa 1.36.2-14.el8_8.1, gvfs-mtp 1.36.2-14.el8_8.1, gvfs-smb 1.36.2-14.el8_8.1, +4 more
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:85940
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) gvfs 1.48.1-8.el9_8.1
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:74370
  • Red Hat Enterprise Linux CRB (v. 8) gvfs 1.36.2-22.el8_10
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:73997
  • Red Hat Enterprise Linux Server (v. 7 ELS) gvfs 1.36.2-7.el7_9.1, gvfs-afc 1.36.2-7.el7_9.1, gvfs-afp 1.36.2-7.el7_9.1, gvfs-goa 1.36.2-7.el7_9.1, gvfs-mtp 1.36.2-7.el7_9.1, gvfs-smb 1.36.2-7.el7_9.1, +4 more Red Hat Enterprise Linux Server Optional (v. 7 ELS) gvfs-tests 1.36.2-7.el7_9.1
    fixed: vendor fix “To mitigate this vulnerability, do not connect to untrusted SFTP servers.” RHSA-2026:86606

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
no
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • GNOME gvfs
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

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.