{"id":"CVE-2026-84268","title":"A flaw was found in the SFTP backend in gvfs","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 se…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-122"],"vendor":"GNOME","product":"gvfs","affected":["gvfs < 1.60.2","gvfs (all versions)","gvfs (all versions)","gvfs (all versions)","gvfs (all versions)","gvfs (all versions)"],"patched":["enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_8","enterprise_linux_crb_v_8"],"published":"2026-09-01","updated":"2026-10-01","sourceUpdated":"2026-10-01T17:17:32.270","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84268","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:73997","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:73998","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:74370","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-84268","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2526485","label":"secalert@redhat.com"},{"url":"https://gitlab.gnome.org/GNOME/gvfs/-/issues/862","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84268.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-84268"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84268"},{"url":"https://access.redhat.com/errata/RHSA-2026:85940","label":"RHSA-2026:85940"},{"url":"https://access.redhat.com/errata/RHSA-2026:85942","label":"RHSA-2026:85942"},{"url":"https://access.redhat.com/errata/RHSA-2026:85943","label":"RHSA-2026:85943"},{"url":"https://access.redhat.com/errata/RHSA-2026:85941","label":"RHSA-2026:85941"},{"url":"https://access.redhat.com/errata/RHSA-2026:85944","label":"RHSA-2026:85944"},{"url":"https://access.redhat.com/errata/RHSA-2026:85945","label":"RHSA-2026:85945"},{"url":"https://access.redhat.com/errata/RHSA-2026:85939","label":"RHSA-2026:85939"},{"url":"https://access.redhat.com/errata/RHSA-2026:86606","label":"RHSA-2026:86606"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-01T18:01:43.116734Z"},"epss":0.00622,"epssPercentile":0.49631,"ingestedAt":"2026-09-30T23:29:32.576Z","slug":"CVE-2026-84268","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:73998** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-09-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:73998)\n- **RHSA-2026:73997** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-09-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:73997)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84268.json)\n- **RHSA-2026:74370** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:74370)\n- **RHSA-2026:86606** · Red Hat · fixed in: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:86606)\n- **RHSA-2026:85941** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:85941)\n- **RHSA-2026:85945** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:85945)\n- **RHSA-2026:85943** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:85943)\n- **RHSA-2026:85940** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:85940)\n- **RHSA-2026:85942** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:85942)\n- **RHSA-2026:85944** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:85944)\n- **RHSA-2026:85939** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:85939)","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}