{"id":"CVE-2026-97610","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix uninitialized return value in netfs_unbuffered_write()\n\nIf preparation of the first subrequest fails,\nnetfs_unbuffered_write() exits its loop before ret is i…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix uninitialized return value in netfs_unbuffered_write()\n\nIf preparation of the first subrequest fails,\nnetfs_unbuffered_write() exits its loop before ret is i…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 72d08d2839649d1c5efbe375751f4473fa4486af < 3d038eebdbd400c3bc4b66bd8aa0dff0c2bcce26","Linux >= a0b4c7a49137ed21279f354eb59f49ddae8dffc2 < 2e38d500471d097cda87d7d374bbc1b13493075d","Linux >= a0b4c7a49137ed21279f354eb59f49ddae8dffc2 < f18e8774f4d3137fa0a5fb8ffa83d59a719666d8","Linux 0c29f6d63122a0168d67cb8ecde5b4cf7fe4acb0","Linux >= 6.18.17 < 6.18.53","Linux >= 6.19.7 < 6.20","Linux 7.0"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:15.100","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97610","references":[{"url":"https://git.kernel.org/stable/c/2e38d500471d097cda87d7d374bbc1b13493075d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3d038eebdbd400c3bc4b66bd8aa0dff0c2bcce26","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f18e8774f4d3137fa0a5fb8ffa83d59a719666d8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97610.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97610"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541016"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97610"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97610"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97610.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-25T11:06:38.900Z","epss":0.00198,"epssPercentile":0.09495,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-908"],"slug":"CVE-2026-97610","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix uninitialized return value in netfs_unbuffered_write()\n\nIf preparation of the first subrequest fails,\nnetfs_unbuffered_write() exits its loop before ret is initialized. The\nempty-iterator check can do the same.\n\nFor synchronous writes, netfs_unbuffered_write_iter_locked() may then\nreturn an unrelated error instead of wreq->error. This is reachable\nthrough CIFS if cifs_prepare_write() fails to reopen the file or obtain\ncredits.\n\nInitialize ret to 0 so the caller returns wreq->error if no data was\nwritten, or the number of bytes already written otherwise.\n\nFound with Clang's -Wconditional-uninitialized.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97610.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213573,"id":"CVE-2026-97610","ts":1790754783962,"field":"cvss","old":null,"new":"5.5"},{"seq":213572,"id":"CVE-2026-97610","ts":1790754783962,"field":"severity","old":"none","new":"medium"}]}