CVE-2022-49870 [High] | Out-of-bounds Read in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: capabilities: fix undefined behavior in bit shift for CAP_TO_MASK Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below: UBSAN: shift-out-of-bounds in security/commoncap.c:1252:2 left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> dump_stack_lvl+0x7d/0xa5 dump_stack+0x15/0x1b ubsan_epilogue+0xe/0x4e __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c cap_task_prctl+0x561/0x6f0 security_task_prctl+0x5a/0xb0 __x64_sys_prctl+0x61/0x8f0 do_syscall_64+0x58/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK>

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-02-25	0.03%	0.05%	+0.02%
2	2025-11-11	0.07%	0.03%	-0.04%
3	2025-07-01	—	0.07%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-02-25

0.03%

0.05%

+0.02%

2025-11-11

0.07%

0.03%

-0.04%

2025-07-01

—

0.07%

—

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-2022-49870

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-49870 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-2022-49870
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2022-49870
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2022-49870/
`ubuntu`	medium	CVE-2022-49870 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, released 154, ignored 149, not-affected 98, needed 4, needs-triage 1.	https://ubuntu.com/security/CVE-2022-49870

Affected software / configurations for CVE-2022-49870

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 2.6.25, < 4.9.334	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.10, < 4.14.300	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.15, < 4.19.267	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.20, < 5.4.225	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.155	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.79	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.0.9	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	6.1	cpe:2.3:o:linux:linux_kernel:6.1:rc1::::::
linux	linux_kernel	6.1	cpe:2.3:o:linux:linux_kernel:6.1:rc2::::::
linux	linux_kernel	6.1	cpe:2.3:o:linux:linux_kernel:6.1:rc3::::::
linux	linux_kernel	6.1	cpe:2.3:o:linux:linux_kernel:6.1:rc4::::::

References for CVE-2022-49870

URL	Tags
https://git.kernel.org/stable/c/151dc8087b5609e53b069c068e3f3ee100efa586	Patch
https://git.kernel.org/stable/c/27bdb134c043ff32c459d98f16550d0ffa0b3c34	Patch
https://git.kernel.org/stable/c/46653972e3ea64f79e7f8ae3aa41a4d3fdb70a13	Patch
https://git.kernel.org/stable/c/5661f111a1616ac105ec8cec81bff99b60f847ac	Patch
https://git.kernel.org/stable/c/5b79fa628e2ab789e629a83cd211ef9b4c1a593e	Patch
https://git.kernel.org/stable/c/65b0bc7a0690861812ade523d19f82688ab819dc	Patch
https://git.kernel.org/stable/c/dbaab08c8677d598244d21afb7818e44e1c5d826	Patch
https://git.kernel.org/stable/c/fcbd2b336834bd24e1d9454ad5737856470c10d7	Patch

URL

CVE-2022-49870 | capabilities: fix undefined behavior in bit shift for CAP_TO_MASK

Exploit prediction scoring system (EPSS) score for CVE-2022-49870

Common vulnerability scoring system (CVSS) metrics for CVE-2022-49870

Weakness enumeration for CVE-2022-49870

OS Trackers for CVE-2022-49870

Affected software / configurations for CVE-2022-49870

References for CVE-2022-49870