CVE-2025-38538dmaengine: nbpfaxi: Fix memory corruption in probe()
- 7.8HighCVSS base score
- 0.19%Exploitation in 30 daysEPSS · top 91% 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: dmaengine: nbpfaxi: Fix memory corruption in probe() The nbpf->chan[] array is allocated earlier in the nbpf_probe() function and it has "num_channels" elements. These three loops iterate one element farther than they should and corrupt memory. The changes to the second loop are more involved. In this case, we're copying data from the irqbuf[] array into the nbpf->chan[] array. If the data in irqbuf[i] is the error IRQ then we skip it, so the iterators are not in sync. I added a check to ensure that we don't go beyond the end of the irqbuf[] array. I'm pretty sure this can't happen, but it seemed harmless to add a check. On the other hand, after the loop has ended there is a check to ensure that the "chan" iterator is where we expect it to be. In the original code we went one element beyond the end of the array so the iterator wasn't in the correct place and it would always return -EINVAL. However, now it will always be in the correct place. I deleted the check since we know the result.
Timeline
ID reserved
By Linux
- 4 months later
· 4 months later
Published
- 9 months later
· 9 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 |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% 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 b45b262cefd5b8eb2ba88d20e5bd295881293894 – < 84fff8e6f11b9af1407e273995b5257d99ff0cff
- affected b45b262cefd5b8eb2ba88d20e5bd295881293894 – < aec396b4f736f3f8d2c28a9cd2924a4ada57ae87
- affected b45b262cefd5b8eb2ba88d20e5bd295881293894 – < 24861ef8b517a309a4225f2793be0cd8fa0bec9e
- affected b45b262cefd5b8eb2ba88d20e5bd295881293894 – < f366b36c5e3ce29c9a3c8eed3d1631908e4fc8bb
- affected b45b262cefd5b8eb2ba88d20e5bd295881293894 – < 4bb016438335ec02b01f96bf1367378c2bfe03e5
- affected b45b262cefd5b8eb2ba88d20e5bd295881293894 – < 122160289adf8ebf15060f1cbf6265b55a914948
- affected b45b262cefd5b8eb2ba88d20e5bd295881293894 – < d6bbd67ab5de37a74ac85c83c5a26664b62034dd
- affected b45b262cefd5b8eb2ba88d20e5bd295881293894 – < 188c6ba1dd925849c5d94885c8bbdeb0b3dcf510
- affected 3.17
- unaffected < 3.17
- unaffected 5.4.297 – ≤ 5.4.*
- unaffected 5.10.241 – ≤ 5.10.*
- unaffected 5.15.190 – ≤ 5.15.*
- unaffected 6.1.147 – ≤ 6.1.*
- unaffected 6.6.100 – ≤ 6.6.*
- unaffected 6.12.40 – ≤ 6.12.*
- unaffected 6.15.8 – ≤ 6.15.*
- unaffected 6.16 – ≤ *
References
References10
- https://git.kernel.org/stable/c/84fff8e6f11b9af1407e273995b5257d99ff0cff (opens in a new tab)
- https://git.kernel.org/stable/c/aec396b4f736f3f8d2c28a9cd2924a4ada57ae87 (opens in a new tab)
- https://git.kernel.org/stable/c/24861ef8b517a309a4225f2793be0cd8fa0bec9e (opens in a new tab)
- https://git.kernel.org/stable/c/f366b36c5e3ce29c9a3c8eed3d1631908e4fc8bb (opens in a new tab)
- https://git.kernel.org/stable/c/4bb016438335ec02b01f96bf1367378c2bfe03e5 (opens in a new tab)
- https://git.kernel.org/stable/c/122160289adf8ebf15060f1cbf6265b55a914948 (opens in a new tab)
- https://git.kernel.org/stable/c/d6bbd67ab5de37a74ac85c83c5a26664b62034dd (opens in a new tab)
- https://git.kernel.org/stable/c/188c6ba1dd925849c5d94885c8bbdeb0b3dcf510 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html (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-2025-26109 (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-2025-38538)Record last updated .