CVE-2026-45935
Description
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot In the 'DeleteIndexEntryRoot' case of the 'do_action' function, the entry size ('esize') is retrieved from the log record without adequate bounds checking. Specifically, the code calculates the end of the entry ('e2') using: e2 = Add2Ptr(e1, esize); It then calculates the size for memmove using 'PtrOffset(e2, ...)', which subtracts the end pointer from the buffer limit. If 'esize' is maliciously large, 'e2' exceeds the used buffer size. This results in a negative offset which, when cast to size_t for memmove, interprets as a massive unsigned integer, leading to a heap buffer overflow. This commit adds a check to ensure that the entry size ('esize') strictly fits within the remaining used space of the index header before performing memory operations.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 6.1.170-1 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.18.14-1 |
| debian | sid | fixed | 6.18.14-1 |
| debian | trixie | fixed | 6.12.85-1 |
| sles | affected | |
References
- https://git.kernel.org/stable/c/36c03f7f177b34d51f1cf1d2304b1074607bf4b0
- https://git.kernel.org/stable/c/b271c9cb85927210b1b799e55ee7f702d12b4336
- https://git.kernel.org/stable/c/a584b9d1059b29e97e17c919274e9adfb846f2a0
- https://git.kernel.org/stable/c/c065541b71b79874c83d418a9acd18ad5826339b
- https://git.kernel.org/stable/c/78942172d5bff4d4afed8674abc09cc560ce44a0
- https://git.kernel.org/stable/c/f3b437a4c3e022a1449658ae9f3dd34859894513
- https://git.kernel.org/stable/c/b2bc7c44ed1779fc9eaab9a186db0f0d01439622
- https://security-tracker.debian.org/tracker/CVE-2026-45935
- https://www.suse.com/security/cve/CVE-2026-45935.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.