CVE-2022-50536
published 2025-10-07CVE-2022-50536: In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data In…
PriorityP340high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.16%
5.4th percentile
In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
In tcp_bpf_send_verdict() redirection, the eval variable is assigned to
__SK_REDIRECT after the apply_bytes data is sent, if msg has more_data,
sock_put() will be called multiple times.
We should reset the eval variable to __SK_NONE every time more_data
starts.
This causes:
IPv4: Attempt to release TCP socket in state 1 00000000b4c925d7
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 5 PID: 4482 at lib/refcount.c:25 refcount_warn_saturate+0x7d/0x110
Modules linked in:
CPU: 5 PID: 4482 Comm: sockhash_bypass Kdump: loaded Not tainted 6.0.0 #1
Hardware name: Red Hat KVM, BIOS 1.11.0-2.el7 04/01/2014
Call Trace:
__tcp_transmit_skb+0xa1b/0xb90
? __alloc_skb+0x8c/0x1a0
? __kmalloc_node_track_caller+0x184/0x320
tcp_write_xmit+0x22a/0x1110
__tcp_push_pending_frames+0x32/0xf0
do_tcp_sendpages+0x62d/0x640
tcp_bpf_push+0xae/0x2c0
tcp_bpf_sendmsg_redir+0x260/0x410
? preempt_count_add+0x70/0xa0
tcp_bpf_send_verdict+0x386/0x4b0
tcp_bpf_sendmsg+0x21b/0x3b0
sock_sendmsg+0x58/0x70
__sys_sendto+0xfa/0x170
? xfd_validate_state+0x1d/0x80
? switch_fpu_return+0x59/0xe0
__x64_sys_sendto+0x24/0x30
do_syscall_64+0x37/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.4-1 (bookworm) | linux 6.1.4-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 15dec6d8f8642a26d6a272af2d7f9877df8f02b8 < 28e4a763cd4a2b1a78852216ef4bd7df3a05cec6 | 28e4a763cd4a2b1a78852216ef4bd7df3a05cec6 |
| linux | linux | >= 5.10.77 < 5.10.163 | 5.10.163 |
| linux | linux | >= 5.14.16 < 5.15 | 5.15 |
| linux | linux | >= 5.4.157 < 5.4.229 | 5.4.229 |
| linux | linux | >= 5f0bfe21c853917aae4bc5a70fe57ddb4054443e < 7508b9f4daac4ec7dfe0b6fb2d688b1c1c105e10 | 7508b9f4daac4ec7dfe0b6fb2d688b1c1c105e10 |
| linux | linux | >= cd9733f5d75c94a32544d6ce5be47e14194cf137 < 8786bde11a4f31b63b3036731df0b47337a7a245 | 8786bde11a4f31b63b3036731df0b47337a7a245 |
| linux | linux | >= cd9733f5d75c94a32544d6ce5be47e14194cf137 < 578a7628b838a3ac8ad61deaab5a816ff032ac13 | 578a7628b838a3ac8ad61deaab5a816ff032ac13 |
| linux | linux | >= cd9733f5d75c94a32544d6ce5be47e14194cf137 < 113236e8f49f262f318c00ebb14b15f4834e87c1 | 113236e8f49f262f318c00ebb14b15f4834e87c1 |
| linux | linux | >= cd9733f5d75c94a32544d6ce5be47e14194cf137 < 7a9841ca025275b5b0edfb0b618934abb6ceec15 | 7a9841ca025275b5b0edfb0b618934abb6ceec15 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.178-1 | 5.10.178-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 0 < 6.1.4-1 | 6.1.4-1 |
| linux | linux_kernel | >= 5.10.77 < 5.10.163 | 5.10.163 |
| linux | linux_kernel | >= 5.14.16 < 5.15 | 5.15 |
| linux | linux_kernel | >= 5.15.1 < 5.15.86 | 5.15.86 |
| linux | linux_kernel | >= 5.16 < 6.0.16 | 6.0.16 |
| linux | linux_kernel | >= 5.4.157 < 5.4.229 | 5.4.229 |
| linux | linux_kernel | >= 6.1 < 6.1.2 | 6.1.2 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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Red Hat
kernel: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
vendor_redhat·2025-10-07·CVSS 7.8
CVE-2022-50536 [HIGH] kernel: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
kernel: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
In tcp_bpf_send_verdict() redirection, the eval variable is assigned to
__SK_REDIRECT after the apply_bytes data is sent, if msg has more_data,
sock_put() will be called multiple times.
We should reset the eval variable to __SK_NONE every time more_data
starts.
This causes:
IPv4: Attempt to release TCP socket in state 1 00000000b4c925d7
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 5 PID: 4482 at lib/refcount.c:25 refcount_warn_saturate+0x7d/0x110
Modules linked in:
CPU: 5 PID: 4482 Comm: sockhash_bypass Kdump: loaded Not tainted
Debian
CVE-2022-50536: linux - In the Linux kernel, the following vulnerability has been resolved: bpf, sockma...
vendor_debian·2022·CVSS 7.8
CVE-2022-50536 [HIGH] CVE-2022-50536: linux - In the Linux kernel, the following vulnerability has been resolved: bpf, sockma...
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data In tcp_bpf_send_verdict() redirection, the eval variable is assigned to __SK_REDIRECT after the apply_bytes data is sent, if msg has more_data, sock_put() will be called multiple times. We should reset the eval variable to __SK_NONE every time more_data starts. This causes: IPv4: Attempt to release TCP socket in state 1 00000000b4c925d7 ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 5 PID: 4482 at lib/refcount.c:25 refcount_warn_saturate+0x7d/0x110 Modules linked in: CPU: 5 PID: 4482 Comm: sockhash_bypass Kdump: loaded Not tainted 6.0.0 #1 Hardware name: Red Hat KVM, BIOS 1.11.0-2.el7 04/01/2014 Call Trace:
OSV
CVE-2022-50536: In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data In tcp_bpf_s
osv·2025-10-07·CVSS 7.8
CVE-2022-50536 [HIGH] CVE-2022-50536: In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data In tcp_bpf_s
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data In tcp_bpf_send_verdict() redirection, the eval variable is assigned to __SK_REDIRECT after the apply_bytes data is sent, if msg has more_data, sock_put() will be called multiple times. We should reset the eval variable to __SK_NONE every time more_data starts. This causes: IPv4: Attempt to release TCP socket in state 1 00000000b4c925d7 ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 5 PID: 4482 at lib/refcount.c:25 refcount_warn_saturate+0x7d/0x110 Modules linked in: CPU: 5 PID: 4482 Comm: sockhash_bypass Kdump: loaded Not tainted 6.0.0 #1 Hardware name: Red Hat KVM, BIOS 1.11.0-2.el7 04/01/2014 Call Trace:
GHSA
GHSA-x73r-r6qr-625x: In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
In tcp_bpf
ghsa_unreviewed·2025-10-07
CVE-2022-50536 [HIGH] CWE-415 GHSA-x73r-r6qr-625x: In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
In tcp_bpf
In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
In tcp_bpf_send_verdict() redirection, the eval variable is assigned to
__SK_REDIRECT after the apply_bytes data is sent, if msg has more_data,
sock_put() will be called multiple times.
We should reset the eval variable to __SK_NONE every time more_data
starts.
This causes:
IPv4: Attempt to release TCP socket in state 1 00000000b4c925d7
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 5 PID: 4482 at lib/refcount.c:25 refcount_warn_saturate+0x7d/0x110
Modules linked in:
CPU: 5 PID: 4482 Comm: sockhash_bypass Kdump: loaded Not tainted 6.0.0 #1
Hardware name: Red Hat KVM, BIOS 1.11.0-2.el7 04/01/2014
Call Tr
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/113236e8f49f262f318c00ebb14b15f4834e87c1https://git.kernel.org/stable/c/28e4a763cd4a2b1a78852216ef4bd7df3a05cec6https://git.kernel.org/stable/c/578a7628b838a3ac8ad61deaab5a816ff032ac13https://git.kernel.org/stable/c/7508b9f4daac4ec7dfe0b6fb2d688b1c1c105e10https://git.kernel.org/stable/c/7a9841ca025275b5b0edfb0b618934abb6ceec15https://git.kernel.org/stable/c/8786bde11a4f31b63b3036731df0b47337a7a245
2025-10-07
Published