{"id":"CVE-2026-89498","title":"orangefs: fix double-free of trailer_buf on readdir copy failure","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\norangefs: fix double-free of trailer_buf on readdir copy failure\n\nOn a readdir downcall, orangefs_devreq_write_iter() frees\nop->downcall.trailer_buf with vfree() when c…","severity":"medium","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-763"],"vendor":"Linux","product":"Linux","affected":["Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 712c4235fcc73c11a2f1d59a499d489e49c374a4","Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 433c2e470053cc9c712314d3d8c3dfbc862d68eb","Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 6e5924644ef4bce06a3cbb7cb841a8bbfdfc03ad","Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 9c9eacc47c618ed6d7d35fe75a40d294c8cdbffa","Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 2f5454a25127854c232fde5d1d65d16fbcd42d43","Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < f796f38a324e89547738f4b70cc33be5be2bc6da","Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 519f4146b8b8c5f20c2ad01913acd6df2df8fc8e","Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < f574296be7f46eb60beca851240b526df232f480","Linux 4.12"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:47:49.902Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89498","references":[{"url":"https://git.kernel.org/stable/c/712c4235fcc73c11a2f1d59a499d489e49c374a4"},{"url":"https://git.kernel.org/stable/c/433c2e470053cc9c712314d3d8c3dfbc862d68eb"},{"url":"https://git.kernel.org/stable/c/6e5924644ef4bce06a3cbb7cb841a8bbfdfc03ad"},{"url":"https://git.kernel.org/stable/c/9c9eacc47c618ed6d7d35fe75a40d294c8cdbffa"},{"url":"https://git.kernel.org/stable/c/2f5454a25127854c232fde5d1d65d16fbcd42d43"},{"url":"https://git.kernel.org/stable/c/f796f38a324e89547738f4b70cc33be5be2bc6da"},{"url":"https://git.kernel.org/stable/c/519f4146b8b8c5f20c2ad01913acd6df2df8fc8e"},{"url":"https://git.kernel.org/stable/c/f574296be7f46eb60beca851240b526df232f480"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89498.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89498"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532343"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89498"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89498"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89498.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00177,"epssPercentile":0.07173,"ingestedAt":"2026-09-14T15:23:07.452Z","slug":"CVE-2026-89498","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\norangefs: fix double-free of trailer_buf on readdir copy failure\n\nOn a readdir downcall, orangefs_devreq_write_iter() frees\nop->downcall.trailer_buf with vfree() when copy_from_iter_full() fails,\nbut does not clear the pointer before goto Efault. The waiter in\ndo_readdir() is then woken with a negative status and frees the same\npointer again on its r < 0 path, causing a deterministic double-free.\nA client holding /dev/pvfs2-req triggers it by sending a readdir\ndowncall whose declared trailer_size exceeds the bytes it supplies.\n\nClear the pointer after freeing so the readdir-side vfree() becomes a\nno-op.\n\n## Affected\n\n- `Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 712c4235fcc73c11a2f1d59a499d489e49c374a4`\n- `Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 433c2e470053cc9c712314d3d8c3dfbc862d68eb`\n- `Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 6e5924644ef4bce06a3cbb7cb841a8bbfdfc03ad`\n- `Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 9c9eacc47c618ed6d7d35fe75a40d294c8cdbffa`\n- `Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 2f5454a25127854c232fde5d1d65d16fbcd42d43`\n- `Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < f796f38a324e89547738f4b70cc33be5be2bc6da`\n- `Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < 519f4146b8b8c5f20c2ad01913acd6df2df8fc8e`\n- `Linux >= 382f4581e67f57209c7aa67e39f26ba076306a2e < f574296be7f46eb60beca851240b526df232f480`\n- `Linux 4.12`\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 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89498.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205499,"id":"CVE-2026-89498","ts":1789576722230,"field":"cvss","old":"4.1","new":"5.5"},{"seq":203992,"id":"CVE-2026-89498","ts":1789490230953,"field":"cvss","old":null,"new":"4.1"},{"seq":203991,"id":"CVE-2026-89498","ts":1789490230953,"field":"severity","old":"none","new":"medium"},{"seq":147327,"id":"CVE-2026-89498","ts":1789270210406,"field":"cvss","old":null,"new":"4.1"},{"seq":147326,"id":"CVE-2026-89498","ts":1789270210406,"field":"severity","old":"none","new":"medium"},{"seq":109084,"id":"CVE-2026-89498","ts":1789183730243,"field":"cvss","old":null,"new":"4.1"},{"seq":109083,"id":"CVE-2026-89498","ts":1789183730243,"field":"severity","old":"none","new":"medium"}]}