{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-74722", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-74722", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-22T15:33:14.582Z", "updatedAt": "2026-08-22T15:33:14.582Z", "importedAt": "2026-10-24T01:58:30.346Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "btrfs: fix memory leak in btrfs_do_encoded_write()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix memory leak in btrfs_do_encoded_write()\n\nLocal fuzzing of 6.12.94 has found the following memory leak:\n\nUnreferenced object 0xffff888018050a80 (size 64):\n comm \"syz.0.17\", pid 10297, jiffies 4294953601\n hex dump (first 32 bytes):\n 00 10 00 00 00 00 00 00 01 00 00 00 00 00 00 00 ................\n 10 0a 05 18 80 88 ff ff 10 0a 05 18 80 88 ff ff ................\n backtrace (crc a8a6fc29):\n kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]\n slab_post_alloc_hook mm/slub.c:4152 [inline]\n slab_alloc_node mm/slub.c:4197 [inline]\n __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358\n kmalloc_noprof include/linux/slab.h:878 [inline]\n extent_changeset_alloc fs/btrfs/extent_io.h:207 [inline]\n qgroup_reserve_data+0x1c5/0x7d0 fs/btrfs/qgroup.c:4305\n btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355\n btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746\n btrfs_encoded_write fs/btrfs/file.c:1482 [inline]\n btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507\n btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738\n btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:906 [inline]\n __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892\n do_syscall_x64 arch/x86/entry/common.c:47 [inline]\n do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUnreferenced object 0xffff888018050a00 (size 64):\n comm \"syz.0.17\", pid 10297, jiffies 4294953601\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 ff 0f 00 00 00 00 00 00 ................\n 90 0a 05 18 80 88 ff ff 90 0a 05 18 80 88 ff ff ................\n backtrace (crc cb5c9580):\n kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]\n slab_post_alloc_hook mm/slub.c:4152 [inline]\n slab_alloc_node mm/slub.c:4197 [inline]\n __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358\n kmalloc_noprof include/linux/slab.h:878 [inline]\n kzalloc_noprof include/linux/slab.h:1014 [inline]\n ulist_prealloc+0x9c/0x110 fs/btrfs/ulist.c:114\n extent_changeset_prealloc fs/btrfs/extent_io.h:217 [inline]\n __set_extent_bit+0x16b/0x1a70 fs/btrfs/extent-io-tree.c:1086\n set_record_extent_bits+0x50/0x90 fs/btrfs/extent-io-tree.c:1821\n qgroup_reserve_data+0x274/0x7d0 fs/btrfs/qgroup.c:4312\n btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355\n btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746\n btrfs_encoded_write fs/btrfs/file.c:1482 [inline]\n btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507\n btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738\n btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:906 [inline]\n __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892\n do_syscall_x64 arch/x86/entry/common.c:47 [inline]\n do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nFix this by freeing an extent changeset before returning from\nbtrfs_do_encoded_write().", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22", "status": "affected", "versionType": "git", "lessThan": "0f0da96ccb1b9f35f4d3d4540dcaab0969d9d6b0" }, { "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22", "status": "affected", "versionType": "git", "lessThan": "e2c7e88815edd5ecfb88e7660ab9fd42bda6bc47" }, { "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22", "status": "affected", "versionType": "git", "lessThan": "20c0eeb4313f9f89d47b80b672b5846f9827cb31" }, { "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22", "status": "affected", "versionType": "git", "lessThan": "24a8f2c29aebb753ccb962fbb25bae18d7978f6e" }, { "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22", "status": "affected", "versionType": "git", "lessThan": "60b50ceba6243802f8d2c0a9a7c2d549a93b1d64" }, { "version": "7c0c7269f7b508ba6e4b063a9314d6bd1fb6db22", "status": "affected", "versionType": "git", "lessThan": "d2a4e4e626b2f4670b69b430c357f03f53eb6632" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.18", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.18" }, { "version": "6.1.183", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.152", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.104", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.45", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.9", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }