CVE-2026-97610 (GCVE-0-2026-97610)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:22 – Updated: 2026-09-25 10:22
VLAI
Title
netfs: Fix uninitialized return value in netfs_unbuffered_write()
Summary
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix uninitialized return value in netfs_unbuffered_write() If preparation of the first subrequest fails, netfs_unbuffered_write() exits its loop before ret is initialized. The empty-iterator check can do the same. For synchronous writes, netfs_unbuffered_write_iter_locked() may then return an unrelated error instead of wreq->error. This is reachable through CIFS if cifs_prepare_write() fails to reopen the file or obtain credits. Initialize ret to 0 so the caller returns wreq->error if no data was written, or the number of bytes already written otherwise. Found with Clang's -Wconditional-uninitialized.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7100 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 72d08d2839649d1c5efbe375751f4473fa4486af , < 3d038eebdbd400c3bc4b66bd8aa0dff0c2bcce26 (git)
Affected: a0b4c7a49137ed21279f354eb59f49ddae8dffc2 , < 2e38d500471d097cda87d7d374bbc1b13493075d (git)
Affected: a0b4c7a49137ed21279f354eb59f49ddae8dffc2 , < f18e8774f4d3137fa0a5fb8ffa83d59a719666d8 (git)
Affected: 0c29f6d63122a0168d67cb8ecde5b4cf7fe4acb0 (git)
Affected: 6.18.17 , < 6.18.53 (semver)
Affected: 6.19.7 , < 6.20 (semver)
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Linux Linux Affected: 7.0
Unaffected: 0 , < 7.0 (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc3 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
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          "value": "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 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-\u003eerror. 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-\u003eerror if no data was\nwritten, or the number of bytes already written otherwise.\n\nFound with Clang\u0027s -Wconditional-uninitialized."
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    "datePublished": "2026-09-25T10:22:20.228Z",
    "dateReserved": "2026-09-24T16:01:01.158Z",
    "dateUpdated": "2026-09-25T10:22:20.228Z",
    "state": "PUBLISHED"
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            "value": "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 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-\u003eerror. 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-\u003eerror if no data was\nwritten, or the number of bytes already written otherwise.\n\nFound with Clang\u0027s -Wconditional-uninitialized."
          }
        ],
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        "metrics": {},
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}



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