ocfs2: always run deallocs on copy-on-write completion
In the Linux kernel, the following vulnerability has been resolved: ocfs2: always run deallocs on copy-on-write completion Local fuzzing of 6.12.94 has found the following memory leak caused by doing 'copy_file_range()' within the same filesystem: unreferenced object 0xffff88812192c980 (size 32): comm "syz.0.49", pid 12095, jiffies 4294964143 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 ................ c0 c5 92 21 81 88 ff ff 00 02 00 00 00 06 00 00 ...!............ backtrace (crc 7068d63f): kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] slab_post_alloc_hook mm/slub.c:4152 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358 kmalloc_noprof include/linux/slab.h:878 [inline] ocfs2_find_per_slot_free_list fs/ocfs2/alloc.c:6618 [inline] ocfs2_cache_block_dealloc+0x155/0x4b0 fs/ocfs2/alloc.c:6786 ocfs2_cache_extent_block_free fs/ocfs2/alloc.c:6819 [inline] ocfs2_unlink_path+0x286/0x450 fs/ocfs2/alloc.c:2613 ocfs2_rotate_subtree_left fs/ocfs2/alloc.c:2779 [inline] __ocfs2_rotate_tree_left+0x1f6f/0x2da0 fs/ocfs2/alloc.c:2985 ocfs2_rotate_tree_left+0x283/0xe00 fs/ocfs2/alloc.c:3237 ocfs2_try_to_merge_extent+0xf56/0x1a20 fs/ocfs2/alloc.c:3825 ocfs2_split_extent+0x15f4/0x2940 fs/ocfs2/alloc.c:5138 ocfs2_clear_ext_refcount+0x2f6/0x550 fs/ocfs2/refcounttree.c:3098 ocfs2_replace_clusters fs/ocfs2/refcounttree.c:3131 [inline] ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3255 [inline] ocfs2_r
CVE-2026-89496
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89496
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6f70fa519976a379d72781d927cf8e5f5b05ec86",
"lessThan": "5ff30f07def6d0e6edacf47952807b5ff60f3af6",
"versionType": "git"
},
{
"status": "affected",
"version": "6f70fa519976a379d72781d927cf8e5f5b05ec86",
"lessThan": "2753e12853ed2023555cec2c5fe22fbaabb2c0b7",
"versionType": "git"
},
{
"status": "affected",
"version": "6f70fa519976a379d72781d927cf8e5f5b05ec86",
"lessThan": "f0261b3aca027f5c409a402ea22f6982750f911c",
"versionType": "git"
},
{
"status": "affected",
"version": "6f70fa519976a379d72781d927cf8e5f5b05ec86",
"lessThan": "a4adaa722977f46511d4247172cd4ec991b80ff2",
"versionType": "git"
},
{
"status": "affected",
"version": "6f70fa519976a379d72781d927cf8e5f5b05ec86",
"lessThan": "123c050eb96aae0bab74c9f06c6ad3de7992722b",
"versionType": "git"
},
{
"status": "affected",
"version": "6f70fa519976a379d72781d927cf8e5f5b05ec86",
"lessThan": "71f07b7f90b3109c9098d1b9c8efbbeece5deb8a",
"versionType": "git"
},
{
"status": "affected",
"version": "6f70fa519976a379d72781d927cf8e5f5b05ec86",
"lessThan": "09e93a60e18e83a630ff84ae00cb564bab96ab1f",
"versionType": "git"
},
{
"status": "affected",
"version": "6f70fa519976a379d72781d927cf8e5f5b05ec86",
"lessThan": "82ea9d4fc05fb7a387db547c6a7c0aa6a3719616",
"versionType": "git"
}
],
"programFiles": [
"fs/ocfs2/refcounttree.c",
"fs/ocfs2/xattr.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.32"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.32",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ocfs2/refcounttree.c",
"fs/ocfs2/xattr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89496
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #35022 · Revision 1
- Added to Heist Feed
- Publisher date