CVE-2022-49877 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix the sk->sk_forward_alloc warning of sk_stream_kill_queues When running `test_sockmap` selftests, the following warning appears: WARNING: CPU: 2 PID: 197 at net/core/stream.c:205 sk_stream_kill_queues+0xd3/0xf0 Call Trace: <TASK> inet_csk_destroy_sock+0x55/0x110 tcp_rcv_state_process+0xd28/0x1380 ? tcp_v4_do_rcv+0x77/0x2c0 tcp_v4_do_rcv+0x77/0x2c0 __release_sock+0x106/0x130 __tcp_close+0x1a7/0x4e0 tcp_close+0x20/0x70 inet_release+0x3c/0x80 __sock_release+0x3a/0xb0 sock_close+0x14/0x20 __fput+0xa3/0x260 task_work_run+0x59/0xb0 exit_to_user_mode_prepare+0x1b3/0x1c0 syscall_exit_to_user_mode+0x19/0x50 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae The root case is in commit 84472b436e76 ("bpf, sockmap: Fix more uncharged while msg has more_data"), where I used msg->sg.size to replace the tosend, causing breakage: if (msg->apply_bytes && msg->apply_bytes < tosend) tosend = psock->apply_bytes;

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.06%	0.16%	+0.10%
2	2026-02-25	0.02%	0.06%	+0.04%
3	2025-05-02	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.06%

0.16%

+0.10%

2026-02-25

0.02%

0.06%

+0.04%

2025-05-02

—

0.02%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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:N) Doesn’t really leak secrets in a meaningful 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	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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:N): Doesn’t really leak secrets in a meaningful 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

3.6

[email protected]

OS Trackers for CVE-2022-49877

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-49877 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-2022-49877
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2022-49877
`suse`	medium	CVE-2022-49877 severity moderate: SUSE including 38 source package names (cluster-md-kmp-default, cluster-md-kmp-default-4.12.14-122.261.1, …), 283 product×package rows across 62 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-HPC-BYOS, … (62 product lines)): Known Not Affected 213, Fixed 70.	https://www.suse.com/security/cve/CVE-2022-49877/
`ubuntu`	medium	CVE-2022-49877 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, ignored 146, released 138, not-affected 121, needs-triage 1.	https://ubuntu.com/security/CVE-2022-49877

Affected software / configurations for CVE-2022-49877

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 5.4.189, < 5.4.225	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.10.110, < 5.10.155	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.15.33, < 5.15.79	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16.19, < 5.17	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.17.2, < 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-2022-49877

URL	Tags
https://git.kernel.org/stable/c/14e8bc3bf7bd6af64d7538a0684c8238d96cdfd7	Patch
https://git.kernel.org/stable/c/8ec95b94716a1e4d126edc3fb2bc426a717e2dba	Patch
https://git.kernel.org/stable/c/95adbd2ac8de82e43fd6b347e7e1b47f74dc1abb	Patch
https://git.kernel.org/stable/c/cc21dc48a78cc9e5af9a4d039cd456446a6e73ff	Patch
https://git.kernel.org/stable/c/d975bec1eaeb52341acc9273db79ddb078220399	Patch

URL

CVE-2022-49877 | bpf, sockmap: Fix the sk->sk_forward_alloc warning of sk_stream_kill_queues

Exploit prediction scoring system (EPSS) score for CVE-2022-49877

Common vulnerability scoring system (CVSS) metrics for CVE-2022-49877

Weakness enumeration for CVE-2022-49877

OS Trackers for CVE-2022-49877

Affected software / configurations for CVE-2022-49877

References for CVE-2022-49877