CVE-2022-50497 [High] | Out-of-bounds Read in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: binfmt_misc: fix shift-out-of-bounds in check_special_flags UBSAN reported a shift-out-of-bounds warning: left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8d/0xcf lib/dump_stack.c:106 ubsan_epilogue+0xa/0x44 lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds+0x1e7/0x208 lib/ubsan.c:322 check_special_flags fs/binfmt_misc.c:241 [inline] create_entry fs/binfmt_misc.c:456 [inline] bm_register_write+0x9d3/0xa20 fs/binfmt_misc.c:654 vfs_write+0x11e/0x580 fs/read_write.c:582 ksys_write+0xcf/0x120 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x34/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4194e1 Since the type of Node's flags is unsigned long, we should define these macros with same type too.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-10-05	—	0.03%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-10-05

—

0.03%

—

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-2022-50497

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-50497 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-2022-50497
`redhat`	low	—	https://access.redhat.com/security/cve/CVE-2022-50497
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2022-50497/
`ubuntu`	medium	CVE-2022-50497 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 150, not-affected 80, needed 5, needs-triage 1.	https://ubuntu.com/security/CVE-2022-50497

Affected software / configurations for CVE-2022-50497

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 2.6.12.1, < 4.9.337	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.10, < 4.14.303	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.15, < 4.19.270	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.20, < 5.4.229	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.163	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.86	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.0.16	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.1, < 6.1.2	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	2.6.12	cpe:2.3:o:linux:linux_kernel:2.6.12:-::::::
linux	linux_kernel	2.6.12	cpe:2.3:o:linux:linux_kernel:2.6.12:rc2::::::
linux	linux_kernel	2.6.12	cpe:2.3:o:linux:linux_kernel:2.6.12:rc3::::::
linux	linux_kernel	2.6.12	cpe:2.3:o:linux:linux_kernel:2.6.12:rc4::::::
linux	linux_kernel	2.6.12	cpe:2.3:o:linux:linux_kernel:2.6.12:rc5::::::

References for CVE-2022-50497

URL	Tags
https://git.kernel.org/stable/c/0f1a48994b3e516d5c7fd5d12204fdba7a604771	Patch
https://git.kernel.org/stable/c/419b808504c26b3e3342365f34ccd0843e09a7f8	Patch
https://git.kernel.org/stable/c/6a46bf558803dd2b959ca7435a5c143efe837217	Patch
https://git.kernel.org/stable/c/88cea1676a09f7c45a1438153a126610c33b1590	Patch
https://git.kernel.org/stable/c/97382a2639b1cd9631f6069061e9d7062cd2b098	Patch
https://git.kernel.org/stable/c/a651bb5ff997b9f02662bcdef3d8b4e6f0d79656	Patch
https://git.kernel.org/stable/c/a91123d4bda463469f68f0427adabf8108001f94	Patch
https://git.kernel.org/stable/c/dcbc51d31d0afbd45e830e3cf565a7b3ca7bf0d8	Patch
https://git.kernel.org/stable/c/ea6145370be8016755c43aca799815fc4b8c88b1	Patch

URL

CVE-2022-50497 | binfmt_misc: fix shift-out-of-bounds in check_special_flags

Exploit prediction scoring system (EPSS) score for CVE-2022-50497

Common vulnerability scoring system (CVSS) metrics for CVE-2022-50497

Weakness enumeration for CVE-2022-50497

OS Trackers for CVE-2022-50497

Affected software / configurations for CVE-2022-50497

References for CVE-2022-50497