CVE-2026-45935fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot
- 7.8HighCVSS base score
- 0.15%Exploitation in 30 daysEPSS · top 96% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVDNVD · Undergoing Analysis | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 96% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 36c03f7f177b34d51f1cf1d2304b1074607bf4b0
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < b271c9cb85927210b1b799e55ee7f702d12b4336
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < a584b9d1059b29e97e17c919274e9adfb846f2a0
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < c065541b71b79874c83d418a9acd18ad5826339b
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 78942172d5bff4d4afed8674abc09cc560ce44a0
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < f3b437a4c3e022a1449658ae9f3dd34859894513
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < b2bc7c44ed1779fc9eaab9a186db0f0d01439622
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.202 – ≤ 5.15.*
- unaffected 6.1.165 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References7
- https://git.kernel.org/stable/c/36c03f7f177b34d51f1cf1d2304b1074607bf4b0 (opens in a new tab)
- https://git.kernel.org/stable/c/b271c9cb85927210b1b799e55ee7f702d12b4336 (opens in a new tab)
- https://git.kernel.org/stable/c/a584b9d1059b29e97e17c919274e9adfb846f2a0 (opens in a new tab)
- https://git.kernel.org/stable/c/c065541b71b79874c83d418a9acd18ad5826339b (opens in a new tab)
- https://git.kernel.org/stable/c/78942172d5bff4d4afed8674abc09cc560ce44a0 (opens in a new tab)
- https://git.kernel.org/stable/c/f3b437a4c3e022a1449658ae9f3dd34859894513 (opens in a new tab)
- https://git.kernel.org/stable/c/b2bc7c44ed1779fc9eaab9a186db0f0d01439622 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32219 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45935)Record last updated .