CVE-2026-89489
CVE CVE-2026-89489EUVD EUVD-2026-76395Published 2026-09-11T19:43:42.000ZLast changed 2026-09-14T12:00:24.000ZCVSS 7.8
What the advisory describes
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. [shorne@gmail.com: fix comment style]
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 5.10.270; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a <a520e8cac54fb403f3800125b606f55fcad42cb9; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a <78004e9a87f240df03e2f73120d291763c32e0a7; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a <b53435c079c78f89f70a62dd5a322cca4e292b34; 3.1; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a <bf310718c6fa6adeee06d207a55489546d860e2c; patch: 6.6.157; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a <1f2e92e499d863f81df1732af59b4a3559969193; patch: 7.3-rc1; patch: 0; patch: 7.2.4; patch: 5.15.221; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a <d64a75369cd0f2ee79afcc9d9ca34a3890989379; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a <574ae2ac2b314aa33498cd2c28add106cbe644f2; patch: 6.18.50; patch: 6.1.188; patch: 6.12.109; 9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a <497cba0b02e5555d99fe9ee1dc478af743ab7f7a
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
Does this concern one of your customers?
This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.
Try it for 28 daysPatchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.