CVE-2026-72164ocfs2: avoid moving extents to occupied clusters
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: ocfs2: avoid moving extents to occupied clusters For non-auto OCFS2_IOC_MOVE_EXT operations, userspace supplies a physical me_goal. ocfs2_move_extent() initializes new_phys_cpos from that goal and expects ocfs2_probe_alloc_group() to replace it with a free run in the target block group. The probe currently leaves *phys_cpos unchanged if the scan reaches the end of the group without finding a free run. An occupied goal at the last bit can therefore survive the probe and be passed to __ocfs2_move_extent(), which copies file data into a cluster still owned by another inode before the bitmap is updated. When the probe does find a free run, it also subtracts move_len from the ending bit. The start of an N-bit run ending at i is i - N + 1, so the current calculation can report the bit immediately before the free run. Clear *phys_cpos before scanning and use the correct free-run start. Callers already treat a zero result as -ENOSPC, so failed probes no longer continue with an occupied caller-controlled goal.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from e6b5859cccfa0fec02f3c5b1069481efc7186f47 before 3112afebf2a76e522fbaabcbb0c47aafbdc35932; from e6b5859cccfa0fec02f3c5b1069481efc7186f47 before 35486b291b8fbde6c4d0b1c79e565c6260d3329d; from e6b5859cccfa0fec02f3c5b1069481efc7186f47 before 19f7b04924b20b81dabbeed19d5542792ba5b6d6; from e6b5859cccfa0fec02f3c5b1069481efc7186f47 before e281d892ce5870a50fdc718cb3bfc3dd5b62c728; from e6b5859cccfa0fec02f3c5b1069481efc7186f47 before 0d0c5c17b18bdbc592ac26ab4d1de7e3dbf9be1e; from e6b5859cccfa0fec02f3c5b1069481efc7186f47 before d5d5a21fb33cd9b963aea99da81e4dacd452cd95; from e6b5859cccfa0fec02f3c5b1069481efc7186f47 before 4d1953d3aeb4a7f6623083e1839068ee1c157db2; from e6b5859cccfa0fec02f3c5b1069481efc7186f47 before 22920541c35a9f23f219038ba5874c843a7c4419 | CNA record |
References
- https://git.kernel.org/stable/c/3112afebf2a76e522fbaabcbb0c47aafbdc35932
- https://git.kernel.org/stable/c/35486b291b8fbde6c4d0b1c79e565c6260d3329d
- https://git.kernel.org/stable/c/19f7b04924b20b81dabbeed19d5542792ba5b6d6
- https://git.kernel.org/stable/c/e281d892ce5870a50fdc718cb3bfc3dd5b62c728
- https://git.kernel.org/stable/c/0d0c5c17b18bdbc592ac26ab4d1de7e3dbf9be1e
- https://git.kernel.org/stable/c/d5d5a21fb33cd9b963aea99da81e4dacd452cd95
- https://git.kernel.org/stable/c/4d1953d3aeb4a7f6623083e1839068ee1c157db2
- https://git.kernel.org/stable/c/22920541c35a9f23f219038ba5874c843a7c4419
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.