CVE-2023-53259 [High] | Out-of-bounds Read in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: VMCI: check context->notify_page after call to get_user_pages_fast() to avoid GPF The call to get_user_pages_fast() in vmci_host_setup_notify() can return NULL context->notify_page causing a GPF. To avoid GPF check if context->notify_page == NULL and return error if so. general protection fault, probably for non-canonical address 0xe0009d1000000060: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0x0005088000000300- 0x0005088000000307] CPU: 2 PID: 26180 Comm: repro_34802241 Not tainted 6.1.0-rc4 #1 Hardware name: Red Hat KVM, BIOS 1.15.0-2.module+el8.6.0 04/01/2014 RIP: 0010:vmci_ctx_check_signal_notify+0x91/0xe0 Call Trace: <TASK> vmci_host_unlocked_ioctl+0x362/0x1f40 __x64_sys_ioctl+0x1a1/0x230 do_syscall_64+0x3a/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.02%	0.14%	+0.12%
2	2026-01-17	0.05%	0.02%	-0.03%
3	2025-11-21	—	0.05%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.02%

0.14%

+0.12%

2026-01-17

0.05%

0.02%

-0.03%

2025-11-21

—

0.05%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.1	3.1	HIGH	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	5.2	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.1

3.1

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

5.2

[email protected]

OS Trackers for CVE-2023-53259

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2023-53259 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2023-53259
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2023-53259
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2023-53259/
`ubuntu`	medium	CVE-2023-53259 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1414 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 1017, ignored 161, released 113, not-affected 81, needed 41, needs-triage 1.	https://ubuntu.com/security/CVE-2023-53259

Affected software / configurations for CVE-2023-53259

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 4.0, < 5.4.296	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.240	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.99	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.1.16	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.2.3	cpe:2.3:o:linux:linux_kernel::::::::
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*

References for CVE-2023-53259

URL	Tags
https://git.kernel.org/stable/c/055891397f530f9b1b22be38d7eca8b08382941f	Patch
https://git.kernel.org/stable/c/1a726cb47fd204109c767409fa9ca15a96328f14	Patch
https://git.kernel.org/stable/c/91b8e4f61f8f4594ee65368c8d89e6fdc29d3fb1	Patch
https://git.kernel.org/stable/c/a3c89e8c69a58f62451c0a75b77fcab25979b897	Patch
https://git.kernel.org/stable/c/b4239bfb260d1e6837766c41a0b241d7670f1402	Patch
https://git.kernel.org/stable/c/d4198f67e7556b1507f14f60d81a72660e5560e4	Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Third Party Advisory

URL

CVE-2023-53259 | VMCI: check context->notify_page after call to get_user_pages_fast() to avoid GPF

Exploit prediction scoring system (EPSS) score for CVE-2023-53259

Common vulnerability scoring system (CVSS) metrics for CVE-2023-53259

Weakness enumeration for CVE-2023-53259

OS Trackers for CVE-2023-53259

Affected software / configurations for CVE-2023-53259

References for CVE-2023-53259