{"id":"CVE-2026-98082","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix the possible bioc_list memory leak during error\n\nThere are two possible ways to leak bioc memory on\nbtrfs_ordered_extent::bioc_list:\n\n- An error occurred for…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix the possible bioc_list memory leak during error\n\nThere are two possible ways to leak bioc memory on\nbtrfs_ordered_extent::bioc_list:\n\n- An error occurred for…","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","cwe":["CWE-401","CWE-772"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.6.130, < 6.6.158","linux_kernel >= 6.7, < 6.12.111","linux_kernel >= 6.13, < 6.18.53","linux_kernel >= 6.19, < 7.2.7","linux_kernel = 7.3"],"patched":["linux_kernel 7.2.7"],"published":"2026-09-25","updated":"2026-10-06","sourceUpdated":"2026-10-06T15:01:24.780","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98082","references":[{"url":"https://git.kernel.org/stable/c/1b4d4e890c2c85d0f6365b5a08c48b4bbf85deb0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/83f0c973cffb184d019390ffdb5d31de5c85bc61","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/afbe73778338e6d1ac8c4486fbdf33f0cc1f2624","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bb4da45766d16503821f167054db76b735d89e94","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d043c43d2b4ebcd75ee7f907948ef2847306d6b2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98082.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98082"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541300"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98082"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98082"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98082.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00122,"epssPercentile":0.01968,"ingestedAt":"2026-09-25T11:06:38.835Z","slug":"CVE-2026-98082","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix the possible bioc_list memory leak during error\n\nThere are two possible ways to leak bioc memory on\nbtrfs_ordered_extent::bioc_list:\n\n- An error occurred for btrfs_insert_one_raid_extent()\n  Then the function btrfs_insert_raid_extent() immediately return\n  without freeing any bioc in the bioc_list.\n\n- An ordered extent hit an IO error\n  In that case the ordered extent will have BTRFS_ORDERED_IOERR set, and\n  skip the call on btrfs_insert_raid_extent() completely.\n\nFix the problem by:\n\n- Introduce a new helper, btrfs_cleanup_ordered_bioc_list()\n  Which will remove all bioc from the bioc_list, and release the bioc.\n\n- Call the above helper for btrfs_insert_raid_extent()\n  So that the cleanup helper is always called no matter what.\n\n- Call the above helper for btrfs_finish_one_ordered()\n  This is called just before the final release on the ordered extent.\n\nThis was reported by Sashiko when reviewing another patch.\n\n## Affected\n\n- `linux_kernel >= 6.6.130, < 6.6.158`\n- `linux_kernel >= 6.7, < 6.12.111`\n- `linux_kernel >= 6.13, < 6.18.53`\n- `linux_kernel >= 6.19, < 7.2.7`\n- `linux_kernel = 7.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.2.7`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10 · updated 2026-09-30 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98082.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":214165,"id":"CVE-2026-98082","ts":1790841317469,"field":"cvss","old":null,"new":"5.5"},{"seq":214164,"id":"CVE-2026-98082","ts":1790841317469,"field":"severity","old":"none","new":"medium"}]}