net: rds: don't hold sock lock when cancelling work from rds_tcp_reset_callbacks()
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: net: rds: don't hold sock lock when cancelling work from rds_tcp_reset_callbacks() syzbot is reporting lockdep warning at rds_tcp_reset_callbacks() [1], for commit ac3615e7f3cffe2a ("RDS: TCP: Reduce code duplication in rds_tcp_reset_callbacks()") added cancel_delayed_work_sync() into a section protected by lock_sock() without realizing that rds_send_xmit() might call lock_sock(). We don't need to protect cancel_delayed_work_sync() using lock_sock(), for even if rds_{send,recv}_worker() re-queued this work while __flush_work() from cancel_delayed_work_sync() was waiting for this work to complete, retried rds_{send,recv}_worker() is no-op due to the absence of RDS_CONN_UP bit.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 4.8 and later | 4.9.331, 4.14.296, 4.19.262, 5.4.220, 5.10.150, 5.15.75, 5.19.17, 6.0.3, 6.1 | Patch available | CNA |
- Linux VendorLinux Affected 4.8 and later Fixed in 4.9.331, 4.14.296, 4.19.262, 5.4.220, 5.10.150, 5.15.75, 5.19.17, 6.0.3, 6.1 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.9.331, 4.14.296, 4.19.262, 5.4.220, 5.10.150, 5.15.75, 5.19.17, 6.0.3, 6.1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
Not affected: 4 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2022-50676
- 2026-10-03 Alias added: GHSA-3p2f-fj9w-3jg5
References
Other 9
- https://git.kernel.org/stable/c/5d2ba255e93211e541373469dffbda7c99dfa0e5
- https://git.kernel.org/stable/c/2425007c0967a7c04b0dee7cce05ecf0ca869ad1
- https://git.kernel.org/stable/c/e3cb25d3ad08f5dbd53ce2b31720cad529944322
- https://git.kernel.org/stable/c/360aa7219285fac63dab99706a16f2daf3222abe
- https://git.kernel.org/stable/c/da349221c4d2d4ac5f606c1c3b36d4ef0b3e6a0c
- https://git.kernel.org/stable/c/30bfa5aa7228eb1e67663d67e553627e572cc717
- https://git.kernel.org/stable/c/c380c28ab9b15fc53565909c814f6dd3e7f77c4b
- https://git.kernel.org/stable/c/afe7053c390fe8ff27d0c2ceaece5625283044ba
- https://git.kernel.org/stable/c/a91b750fd6629354460282bbf5146c01b05c4859
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Sources
- CVE-2022-50676 · CVE Program
- CVE-2022-50676 · NVD
- FIRST EPSS
- GHSA-3p2f-fj9w-3jg5 · GitHub Advisory Database · CC BY 4.0
- CVE-2022-50676 · Red Hat security data · CC BY 4.0
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