High Memory corruption

CVE-2025-39883 — mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory

In the Linux kernel, the following vulnerability has been resolved: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory When I did memory failure tests, below panic occurs: page dumped because: VM_BUG_ON_PAGE(PagePoisoned(page)) kernel BUG at include/linux/page-flags.h:616! Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 3 PID: 720 Comm: bash Not tainted 6.10.0-rc1-00195-g148743902568 #40 RIP: 0010:unpoison_memory+0x2f3/0x590 RSP: 0018:ffffa57fc8787d60 EFLAGS: 00000246 RAX: 0000000000000037 RBX: 0000000000000009 RCX: ffff9be25fcdc9c8 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff9be25fcdc9c0 RBP: 0000000000300000 R08: ffffffffb4956f88 R09: 0000000000009ffb R10: 0000000000000284 R11: ffffffffb4926fa0 R12: ffffe6b00c000000 R13: ffff9bdb453dfd00 R14: 0000000000000000 R15: fffffffffffffffe FS: 00007f08f04e4740(0000) GS:ffff9be25fcc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000564787a30410 CR3: 000000010d4e2000 CR4: 00000000000006f0 Call Trace: <TASK> unpoison_memory+0x2f3/0x590 simple_attr_write_xsigned.constprop.0.isra.0+0xb3/0x110 debugfs_attr_write+0x42/0x60 full_proxy_write+0x5b/0x80 vfs_write+0xd5/0x540 ksys_write+0x64/0xe0 do_syscall_64+0xb9/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f08f0314887 RSP: 002b:00007ffece710078 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00007f08f0314887 RDX: 0000000000000009 RSI: 0000564787a30410 RDI: 0000000000000001 RBP: 0000564787a30410 R08: 000000000000fefe R09: 000000007fffffff R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009 R13: 00007f08f041b780 R14: 00007f08f0417600 R15: 00007f08f0416a00 </TASK> Modules linked in: hwpoison_inject ---[ end trace 0000000000000000 ]--- RIP: 0010:unpoison_memory+0x2f3/0x590 RSP: 0018:ffffa57fc8787d60 EFLAGS: 00000246 RAX: 0000000000000037 RBX: 0000000000000009 RCX: ffff9be25fcdc9c8 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff9be25fcdc9c0 RBP: 0000000000300000 R08: ffffffffb4956f88 R09: 0000000000009ffb R10: 0000000000000284 R11: ffffffffb4926fa0 R12: ffffe6b00c000000 R13: ffff9bdb453dfd00 R14: 0000000000000000 R15: fffffffffffffffe FS: 00007f08f04e4740(0000) GS:ffff9be25fcc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000564787a30410 CR3: 000000010d4e2000 CR4: 00000000000006f0 Kernel panic - not syncing: Fatal exception Kernel Offset: 0x31c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) ---[ end Kernel panic - not syncing: Fatal exception ]--- The root cause is that unpoison_memory() tries to check the PG_HWPoison flags of an uninitialized page. So VM_BUG_ON_PAGE(PagePoisoned(page)) is triggered. This can be reproduced by below steps: 1.Offline memory block: echo offline > /sys/devices/system/memory/memory12/state 2.Get offlined memory pfn: page-types -b n -rlN 3.Write pfn to unpoison-pfn echo <pfn> > /sys/kernel/debug/hwpoison/unpoison-pfn This scenario can be identified by pfn_to_online_page() returning NULL. And ZONE_DEVICE pages are never expected, so we can simply fail if pfn_to_online_page() == NULL to fix the bug.

Published Sep 23, 2025 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.16%

ahead of 4% of scored CVEs · Oct 19, 2026

Affects

Debian

Debian Linux and 2 more

CVSS base

7.1

High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Debian Debian Linux, Linux Linux, Linux Linux Kernel).
Apply the fixed version or the patch documented under Remediation.
Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Debian	Debian Linux	version 11.0	Vulnerable	NIST National Vulnerability Database
Linux	Linux	version 4.13≥ f1dd2cd13c4bbbc9a7c4617b3b034fa643de98fe and < d613f53c83ec47089c4e25859d5e8e0359f6f8da≥ f1dd2cd13c4bbbc9a7c4617b3b034fa643de98fe and < 63a327a2375a8ce7a47dec5aaa4d8a9ae0a00b96≥ f1dd2cd13c4bbbc9a7c4617b3b034fa643de98fe and < 7618fd443aa4cfa553a64cacf5721581653ee7b0≥ f1dd2cd13c4bbbc9a7c4617b3b034fa643de98fe and < 3d278e89c2ea62b1aaa4b0d8a9766a35b3a3164a≥ f1dd2cd13c4bbbc9a7c4617b3b034fa643de98fe and < e4ec6def5643a1c9511115b3884eb879572294c6≥ f1dd2cd13c4bbbc9a7c4617b3b034fa643de98fe and < 99f7048957f5ae3cee1c01189147e73a9a96de02≥ f1dd2cd13c4bbbc9a7c4617b3b034fa643de98fe and < fb65803ccff37cf9123c50c1c02efd1ed73c4ed5 and 1 more ≥ f1dd2cd13c4bbbc9a7c4617b3b034fa643de98fe and < 8e01ea186a52c90694c08a9ff57bea1b0e78256a	Vulnerable	CVE Program (cve.org) e CISA ADP
Linux	Linux Kernel	version 6.17-rc4version 6.17-rc5version 6.17-rc3version 6.17-rc2version 6.17-rc1≥ 6.13 and < 6.16.8≥ 6.7 and < 6.12.48≥ 6.2 and < 6.6.107 and 4 more ≥ 5.16 and < 6.1.153≥ 5.11 and < 5.15.194≥ 5.5 and < 5.10.245≥ 4.13 and < 5.4.300	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.1	CVSS 3.1	High	1.8	5.2	nvd@nist.gov via NIST National Vulnerability Database
7.1	CVSS 3.1	High	—	—	GitHub, Inc. via GitHub Security Advisories

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-125 · Out-of-bounds Read

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.

endpoint telemetry (EDR)crash dumps

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 19, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 19, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 19, 2026
Fix documented
Oct 19, 2026 · NIST National Vulnerability Database
Affected products added · linux/linux kernel, debian/debian linux
Oct 19, 2026 · NIST National Vulnerability Database
CVSS changed · 7.1
Oct 19, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 19, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 19, 2026 · Alertas do Telegram
2025
CVE published
Sep 23, 2025 · Linux

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 19, 2026 – Oct 19, 2026
1× Official description updated · Oct 19, 2026 – Oct 19, 2026

References

11 on the record

git.kernel.org/stable/c/8e01ea186a52c90694c08a9ff57bea1b0e78256a
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/63a327a2375a8ce7a47dec5aaa4d8a9ae0a00b96
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/3d278e89c2ea62b1aaa4b0d8a9766a35b3a3164a
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/d613f53c83ec47089c4e25859d5e8e0359f6f8da
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/7618fd443aa4cfa553a64cacf5721581653ee7b0
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/99f7048957f5ae3cee1c01189147e73a9a96de02
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/e4ec6def5643a1c9511115b3884eb879572294c6
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/fb65803ccff37cf9123c50c1c02efd1ed73c4ed5
Patch, NIST National Vulnerability Database
github.com/advisories/GHSA-r5ff-446r-jr83
GitHub Security Advisories
lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Mailing List, Third Party Advisory, NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2025-39883
GitHub Security Advisories

Elsewhere on this site

Debian
every CVE for this vendor

Memory corruption
same class

CWE-125
other pages naming this weakness

Related CVEs (same products)

Unknown CVE-2026-98866 sched/cache: Introduce task_struct->sched_cache_grp to fix UAF 1d
Unknown CVE-2026-98867 dm-pcache: bound the logical key offset from persistent memory 1d
Unknown CVE-2026-98868 dm-pcache: reject a kset that overruns its segment 1d
Unknown CVE-2026-98856 kprobes: Skip disarmed probes when checking optkprobe overlap 1d
Unknown CVE-2026-98857 ipvs: bound LBLCR and LBLC cache growth 1d
Unknown CVE-2026-98858 io_uring: fix task_work add use-after-free with SQPOLL 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-39883 is "mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory", rated High. It affects Debian Linux (Debian); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.1 describes technical severity. EPSS 0.16% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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