CVE-2024-56611: mm/mempolicy: fix migrate_to_node() assuming there is at least one VMA in a MM
First published: Fri Dec 27 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: mm/mempolicy: fix migrate_to_node() assuming there is at least one VMA in a MM We currently assume that there is at least one VMA in a MM, which isn't true. So we might end up having find_vma() return NULL, to then de-reference NULL. So properly handle find_vma() returning NULL. This fixes the report: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 6021 Comm: syz-executor284 Not tainted 6.12.0-rc7-syzkaller-00187-gf868cd251776 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:migrate_to_node mm/mempolicy.c:1090 [inline] RIP: 0010:do_migrate_pages+0x403/0x6f0 mm/mempolicy.c:1194 Code: ... RSP: 0018:ffffc9000375fd08 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc9000375fd78 RCX: 0000000000000000 RDX: ffff88807e171300 RSI: dffffc0000000000 RDI: ffff88803390c044 RBP: ffff88807e171428 R08: 0000000000000014 R09: fffffbfff2039ef1 R10: ffffffff901cf78f R11: 0000000000000000 R12: 0000000000000003 R13: ffffc9000375fe90 R14: ffffc9000375fe98 R15: ffffc9000375fdf8 FS: 00005555919e1380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555919e1ca8 CR3: 000000007f12a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> kernel_migrate_pages+0x5b2/0x750 mm/mempolicy.c:1709 __do_sys_migrate_pages mm/mempolicy.c:1727 [inline] __se_sys_migrate_pages mm/mempolicy.c:1723 [inline] __x64_sys_migrate_pages+0x96/0x100 mm/mempolicy.c:1723 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f [akpm@linux-foundation.org: add unlikely()]
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | >=2.6.16<6.6.66 | |
| Linux kernel | >=6.7<6.12.5 | |
| Linux kernel | =6.13-rc1 | |
| Linux Kernel | >=2.6.16<6.6.66 | |
| Linux Kernel | >=6.7<6.12.5 | |
| Linux Kernel | =6.13-rc1 | |
| debian/linux | <=5.10.223-1<=5.10.234-1<=6.1.129-1<=6.1.128-1 | 6.12.20-1 6.12.21-1 |
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Reference Links
- https://git.kernel.org/stable/c/a13b2b9b0b0b04612c7d81e3b3dfb485c5f7abc3
- https://git.kernel.org/stable/c/42d9fe2adf8613f9eea1f0c2619c9e2611eae0ea
- https://git.kernel.org/stable/c/091c1dd2d4df6edd1beebe0e5863d4034ade9572
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56611
- https://nvd.nist.gov/vuln/detail/CVE-2024-56611
- https://launchpad.net/bugs/cve/CVE-2024-56611
- https://security-tracker.debian.org/tracker/CVE-2024-56611
- https://ubuntu.com/security/CVE-2024-56611
- https://git.kernel.org/linus/091c1dd2d4df6edd1beebe0e5863d4034ade9572
Frequently Asked Questions
What is the severity of CVE-2024-56611?
CVE-2024-56611 is considered a moderate severity vulnerability in the Linux Kernel.
How do I fix CVE-2024-56611?
To fix CVE-2024-56611, upgrade to a patched version of the Linux Kernel that addresses this issue.
What systems are affected by CVE-2024-56611?
CVE-2024-56611 affects various versions of the Linux Kernel from 2.6.16 to 6.12.5 and specifically includes 6.13-rc1.
What does CVE-2024-56611 affect in the Linux Kernel?
CVE-2024-56611 affects the memory management subsystem, specifically the migrate_to_node() function which incorrectly assumes the presence of at least one VMA.
When was CVE-2024-56611 discovered?
CVE-2024-56611 was resolved in recent updates to the Linux Kernel, although specific discovery dates are not detailed in the provided information.
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