sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-667 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop With this refcnt added in sctp_stream_priorities, we don't need to traverse all streams to check if the prio is used by other streams when freeing one stream's prio in sctp_sched_prio_free_sid(). This can avoid a nested loop (up to 65535 * 65535), which may cause a stuck as Ying reported: watchdog: BUG: soft lockup - CPU#23 stuck for 26s! [ksoftirqd/23:136] Call Trace: <TASK> sctp_sched_prio_free_sid+0xab/0x100 [sctp] sctp_stream_free_ext+0x64/0xa0 [sctp] sctp_stream_free+0x31/0x50 [sctp] sctp_association_free+0xa5/0x200 [sctp] Note that it doesn't need to use refcount_t type for this counter, as its accessing is always protected under the sock lock. v1->v2: - add a check in sctp_sched_prio_set to avoid the possible prio_head refcnt overflow.
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 | 5.4.226 to before 5.4.235; 5.10.158 to before 5.10.173; 5.15.82 to before 5.15.100; 6.0.12 to before 6.1 | 5.4.235, 5.10.173, 5.15.100, 6.1 | Patch available | CNA |
| Linux | Linux | 6.1 and later | 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, 6.3 | Patch available | CNA |
- Linux VendorLinux Affected 5.4.226 to before 5.4.235; 5.10.158 to before 5.10.173; 5.15.82 to before 5.15.100; 6.0.12 to before 6.1 Fixed in 5.4.235, 5.10.173, 5.15.100, 6.1 Patch available CNA
- Linux VendorLinux Affected 6.1 and later Fixed in 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, 6.3 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.4.226 to before 5.4.235; 5.10.158 to before 5.10.173; 5.15.82 to before 5.15.100; 6.0.12 to before 6.1; 6.1.1 to before 6.1.18; 6.2 to before 6.2.5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.1:-:*:*:*:*:*:* | 6.1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:* | 6.1 rc8 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.4.226 to before 5.4.235; 5.10.158 to before 5.10.173; 5.15.82 to before 5.15.100; 6.0.12 to before 6.1; 6.1.1 to before 6.1.18; 6.2 to before 6.2.5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.1:-:*:*:*:*:*:* Versions 6.1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:* Versions 6.1 rc8 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.235, 5.10.173, 5.15.100, 6.1
- Fix · CNA Linux (Linux) Fixed in 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, 6.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-53590
- 2026-10-03 Alias added: GHSA-h343-797x-8cg9
References
Patch 6
- https://git.kernel.org/stable/c/cec326443f01283ef68ea00c06ea073b1835a562
- https://git.kernel.org/stable/c/8ee401f89cdb10f39098c0656d695b2bc4052100
- https://git.kernel.org/stable/c/bf5540cbd20e2dae2c81ab9b31deef41ef147d0a
- https://git.kernel.org/stable/c/03c3a5584a0a29821e59b7834635ce823050caaa
- https://git.kernel.org/stable/c/6d529928ea212127851a2df8c40d822237ca946b
- https://git.kernel.org/stable/c/68ba44639537de6f91fe32783766322d41848127
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Sources
- CVE-2023-53590 · CVE Program
- CVE-2023-53590 · NVD
- FIRST EPSS
- GHSA-h343-797x-8cg9 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-53590 · Red Hat security data · CC BY 4.0
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