- 7.8HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% 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: openrisc: fix arbitrary kernel memory access via or1k_atomic syscall sys_or1k_atomic() (syscall 244 in the "or1k" ABI) takes two user pointers, v1 and v2, and swaps the words they point to in hand-written assembly. l.lwz r29,0(r4) l.lwz r27,0(r5) l.sw 0(r4),r27 l.sw 0(r5),r29 The pointers are not checked with access_ok(). The four memory accesses also have no exception table entries. A caller passes a kernel address as either pointer, and the syscall reads from and writes to it directly. This gives an unprivileged process a kernel read/write primitive. It overwrites kernel data such as the sys_call_table, gaining code execution in kernel context. Check both pointers before entering the critical section. Add fixups for the four memory accesses so faults on valid but unmapped user addresses return -EFAULT. [[email protected]: fix comment style]
Timeline
ID reserved
By Linux
Published
- 38 days later
· 38 days 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:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 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)
- 0.14% · top 97% of all CVEs (12 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 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a – < bf310718c6fa6adeee06d207a55489546d860e2c
- affected 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a – < 497cba0b02e5555d99fe9ee1dc478af743ab7f7a
- affected 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a – < 1f2e92e499d863f81df1732af59b4a3559969193
- affected 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a – < 574ae2ac2b314aa33498cd2c28add106cbe644f2
- affected 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a – < a520e8cac54fb403f3800125b606f55fcad42cb9
- affected 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a – < d64a75369cd0f2ee79afcc9d9ca34a3890989379
- affected 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a – < b53435c079c78f89f70a62dd5a322cca4e292b34
- affected 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a – < 78004e9a87f240df03e2f73120d291763c32e0a7
- affected 3.1
- unaffected < 3.1
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/bf310718c6fa6adeee06d207a55489546d860e2c (opens in a new tab)
- https://git.kernel.org/stable/c/497cba0b02e5555d99fe9ee1dc478af743ab7f7a (opens in a new tab)
- https://git.kernel.org/stable/c/1f2e92e499d863f81df1732af59b4a3559969193 (opens in a new tab)
- https://git.kernel.org/stable/c/574ae2ac2b314aa33498cd2c28add106cbe644f2 (opens in a new tab)
- https://git.kernel.org/stable/c/a520e8cac54fb403f3800125b606f55fcad42cb9 (opens in a new tab)
- https://git.kernel.org/stable/c/d64a75369cd0f2ee79afcc9d9ca34a3890989379 (opens in a new tab)
- https://git.kernel.org/stable/c/b53435c079c78f89f70a62dd5a322cca4e292b34 (opens in a new tab)
- https://git.kernel.org/stable/c/78004e9a87f240df03e2f73120d291763c32e0a7 (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-2026-76395 (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-2026-89489)Record last updated .