CVE-2022-50536bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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: <TASK> __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
Timeline
ID reserved
By Linux
Published
- 10 months later
· 10 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 5f0bfe21c853917aae4bc5a70fe57ddb4054443e – < 7508b9f4daac4ec7dfe0b6fb2d688b1c1c105e10
- affected 15dec6d8f8642a26d6a272af2d7f9877df8f02b8 – < 28e4a763cd4a2b1a78852216ef4bd7df3a05cec6
- affected cd9733f5d75c94a32544d6ce5be47e14194cf137 – < 8786bde11a4f31b63b3036731df0b47337a7a245
- affected cd9733f5d75c94a32544d6ce5be47e14194cf137 – < 578a7628b838a3ac8ad61deaab5a816ff032ac13
- affected cd9733f5d75c94a32544d6ce5be47e14194cf137 – < 113236e8f49f262f318c00ebb14b15f4834e87c1
- affected cd9733f5d75c94a32544d6ce5be47e14194cf137 – < 7a9841ca025275b5b0edfb0b618934abb6ceec15
- affected 6f226ffe4458ea3b8c33287cb8c86f87dc198dce
- affected 5.4.157 – < 5.4.229
- affected 5.10.77 – < 5.10.163
- affected 5.14.16 – < 5.15
- affected 5.15
- unaffected < 5.15
- unaffected 5.4.229 – ≤ 5.4.*
- unaffected 5.10.163 – ≤ 5.10.*
- unaffected 5.15.86 – ≤ 5.15.*
- unaffected 6.0.16 – ≤ 6.0.*
- unaffected 6.1.2 – ≤ 6.1.*
- unaffected 6.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/7508b9f4daac4ec7dfe0b6fb2d688b1c1c105e10 (opens in a new tab)
- https://git.kernel.org/stable/c/28e4a763cd4a2b1a78852216ef4bd7df3a05cec6 (opens in a new tab)
- https://git.kernel.org/stable/c/8786bde11a4f31b63b3036731df0b47337a7a245 (opens in a new tab)
- https://git.kernel.org/stable/c/578a7628b838a3ac8ad61deaab5a816ff032ac13 (opens in a new tab)
- https://git.kernel.org/stable/c/113236e8f49f262f318c00ebb14b15f4834e87c1 (opens in a new tab)
- https://git.kernel.org/stable/c/7a9841ca025275b5b0edfb0b618934abb6ceec15 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-32021 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-50536)Record last updated .