Search/CVE-2025-21866
● CVE — Medium

CVE-2025-21866

VendorlinuxProductlinux kernelDiscoveredMar 12, 2025UpdatedNov 3, 2025

In the Linux kernel, the following vulnerability has been resolved: powerpc/code-patching: Fix KASAN hit by not flagging text patching area as VM_ALLOC Erhard reported the following KASAN hit while booting his PowerMac G4 with a KASAN-enabled kernel 6.13-rc6: BUG: KASAN: vmalloc-out-of-bounds in copy_to_kernel_nofault+0xd8/0x1c8 Write of size 8 at addr f1000000 by task chronyd/1293 CPU: 0 UID: 123 PID: 1293 Comm: chronyd Tainted: G W 6.13.0-rc6-PMacG4 #2 Tainted: [W]=WARN Hardware name: PowerMac3,6 7455 0x80010303 PowerMac Call Trace: [c2437590] [c1631a84] dump_stack_lvl+0x70/0x8c (unreliable) [c24375b0] [c0504998] print_report+0xdc/0x504 [c2437610] [c050475c] kasan_report+0xf8/0x108 [c2437690] [c0505a3c] kasan_check_range+0x24/0x18c [c24376a0] [c03fb5e4] copy_to_kernel_nofault+0xd8/0x1c8…

CVSS v3.1
5.5 MEDIUM
EPSS
0.25%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
3
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Oct 6, 2026
▲ 0.03pp
0.22% → 0.25% over 4 tracked changes
CVSS v3.1 Detail
Attack VectorLOCAL
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
ConfidentialityNONE
IntegrityNONE
AvailabilityHIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Connections
5 relationships
Timeline
disclosure → media coverage
Mar 12, 2025
Disclosure — published as a CVE record. · last revised by NVD Nov 3, 2025
Aug 19, 2025
ubuntu.com reports: USN-7703-1: Linux kernel vulnerabilities
Aug 20, 2025
ubuntu.com reports: USN-7703-2: Linux kernel vulnerabilities
Aug 26, 2025
ubuntu.com reports: USN-7719-1: Linux kernel (Raspberry Pi Real-time) vulnerabilities