CVE-2026-45935fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot
Updated under an hour ago ()
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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
- Undergoing Analysis
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from b46acd6a6a627d876898e1c84d3f84902264b445 before 36c03f7f177b34d51f1cf1d2304b1074607bf4b0; from b46acd6a6a627d876898e1c84d3f84902264b445 before b271c9cb85927210b1b799e55ee7f702d12b4336; from b46acd6a6a627d876898e1c84d3f84902264b445 before a584b9d1059b29e97e17c919274e9adfb846f2a0; from b46acd6a6a627d876898e1c84d3f84902264b445 before c065541b71b79874c83d418a9acd18ad5826339b; from b46acd6a6a627d876898e1c84d3f84902264b445 before 78942172d5bff4d4afed8674abc09cc560ce44a0; from b46acd6a6a627d876898e1c84d3f84902264b445 before f3b437a4c3e022a1449658ae9f3dd34859894513; from b46acd6a6a627d876898e1c84d3f84902264b445 before b2bc7c44ed1779fc9eaab9a186db0f0d01439622 | CNA record |
linux linux_kernel linux:linux_kernel | from 5.15 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.14; from 6.19 before 6.19.4 | NVD |
References
- https://git.kernel.org/stable/c/36c03f7f177b34d51f1cf1d2304b1074607bf4b0patch
- https://git.kernel.org/stable/c/b271c9cb85927210b1b799e55ee7f702d12b4336patch
- https://git.kernel.org/stable/c/a584b9d1059b29e97e17c919274e9adfb846f2a0patch
- https://git.kernel.org/stable/c/c065541b71b79874c83d418a9acd18ad5826339bpatch
- https://git.kernel.org/stable/c/78942172d5bff4d4afed8674abc09cc560ce44a0patch
- https://git.kernel.org/stable/c/f3b437a4c3e022a1449658ae9f3dd34859894513patch
- https://git.kernel.org/stable/c/b2bc7c44ed1779fc9eaab9a186db0f0d01439622patch
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.