Answer in brief
CVE-2026-80560 records a Unknown severity vulnerability in openrisc: signal: do not restore privileged SR bits on sigreturn. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ac689eb7f9d4e270d1365853b82eece669387e2c <bc2e24ba6e167ccf374a197457aa5640a802f429 || >=ac689eb7f9d4e270d1365853b82eece669387e2c <cf1b5514ddf9df098ce7e3741fc9679fd85a4ec6 || >=ac689eb7f9d4e270d1365853b82eece669387e2c <cd8b43a71755c516f5c1f265a103438ae9ab15be || >=ac689eb7f9d4e270d1365853b82eece669387e2c <b4d73c3848bae9084fa8b9b2aa76d99a7d8eb17d || >=ac689eb7f9d4e270d1365853b82eece669387e2c <89a91b30685c0493b0fa2b47d0ab41061a63069d || >=ac689eb7f9d4e270d1365853b82eece669387e2c <a88d688be8d7f03cbf927f2ab454ea9fa58d2979 || >=ac689eb7f9d4e270d1365853b82eece669387e2c <212fc482ddd7f9ccdd74a05eab1cac849350dcd6 || >=ac689eb7f9d4e270d1365853b82eece669387e2c <32ef1b30ad736519f7a207bcc2986f3d4129d972 | bc2e24ba6e167ccf374a197457aa5640a802f429, cf1b5514ddf9df098ce7e3741fc9679fd85a4ec6, cd8b43a71755c516f5c1f265a103438ae9ab15be, b4d73c3848bae9084fa8b9b2aa76d99a7d8eb17d, 89a91b30685c0493b0fa2b47d0ab41061a63069d, a88d688be8d7f03cbf927f2ab454ea9fa58d2979, 212fc482ddd7f9ccdd74a05eab1cac849350dcd6, 32ef1b30ad736519f7a207bcc2986f3d4129d972 |
| Linux/Linuxgeneric | 3.1 | Not reported |
Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 26, 2026
In the Linux kernel, the following vulnerability has been resolved: openrisc: signal: do not restore privileged SR bits on sigreturn restore_sigcontext() copies the whole supervision register (SR) from the signal frame and only clears SPR_SR_SM before the value is reloaded into the hardware SR (through ESR and l.rfe) on the return to user space. All other SR bits are left under user control. An unprivileged task can thus return from a signal handler through a crafted sigframe that clears SPR_SR_DME. With the data MMU disabled the CPU performs no translation or protection on data accesses, so the task gains read and write access to arbitrary physical memory, a local privilege escalation. SPR_SR_IME, SPR_SR_SUMRA, SPR_SR_LEE, SPR_SR_EPH and the cache-enable bits are exposed the same way. The ptrace GPR regset already refuses any change to SR for exactly this reason. Restore only the arithmetic flag bits (F, CY, OV) from the signal frame and take every privileged control bit from the SR the kernel saved on signal entry. Verified with qemu-system-or1k -M or1k-sim: before this change an unprivileged PoC clears SPR_SR_DME in rt_sigreturn and writes a marker to physical address 0x03000000 (beyond the kernel's mem=32M); afterwards the same PoC receives SIGSEGV and physical memory is unchanged.
Quoted source text, attributed separately from HOL analysis.