RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt
Priority MEDIUM 44CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 5 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt In rxe_comp_queue_pkt() an incoming response packet skb is enqueued to the resp_pkts queue and then a decision is made whether to run the completer task inline or schedule it. Finally the skb is dereferenced to bump a 'hw' performance counter. This is wrong because if the completer task is already running in a separate thread it may have already processed the skb and freed it which can cause a seg fault. This has been observed infrequently in testing at high scale. This patch fixes this by changing the order of enqueuing the packet until after the counter is accessed.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00815 57th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.4.285, 5.10.227, 5.15.168 +5Red Hat: 1 advisoryRed Hat: 5 fixed, 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 4.12 and later | 5.4.285, 5.10.227, 5.15.168, 6.1.93, 6.6.33, 6.8.12, 6.9.3, 6.10 | Patch available | CNA |
- Linux VendorLinux Affected 4.12 and later Fixed in 5.4.285, 5.10.227, 5.15.168, 6.1.93, 6.6.33, 6.8.12, 6.9.3, 6.10 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.12 to before 5.4.285; 5.5 to before 5.10.227; 5.11 to before 5.15.168; 5.16 to before 6.1.93; 6.2 to before 6.6.33; 6.7 to before 6.8.12; 6.9 to before 6.9.3 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.12 to before 5.4.285; 5.5 to before 5.10.227; 5.11 to before 5.15.168; 5.16 to before 6.1.93; 6.2 to before 6.6.33; 6.7 to before 6.8.12; 6.9 to before 6.9.3 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.285, 5.10.227, 5.15.168, 6.1.93, 6.6.33, 6.8.12, 6.9.3, 6.10
Red Hat 1 advisory
- RHSA-2024:5928 Released 2024-08-28 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.33.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.33.1.el9_4, kernel-64k-devel-5.14.0-427.33.1.el9_4 +11
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.33.1.el9_4, kernel-5.14.0-427.33.1.el9_4, kernel-64k-5.14.0-427.33.1.el9_4 +29
- Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.33.1.el9_4, libperf-5.14.0-427.33.1.el9_4
- Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.33.1.el9_4, kernel-rt-core-5.14.0-427.33.1.el9_4, kernel-rt-debug-5.14.0-427.33.1.el9_4 +11
- Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.33.1.el9_4, kernel-rt-core-5.14.0-427.33.1.el9_4, kernel-rt-debug-5.14.0-427.33.1.el9_4 +9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2024:5928 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2024:5928 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2024:5928 |
| Red Hat Enterprise Linux NFV (v. 9) | Fixed | RHSA-2024:5928 |
| Red Hat Enterprise Linux RT (v. 9) | Fixed | RHSA-2024:5928 |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2024-38544
- 2026-10-03 Alias added: GHSA-mqxf-7jx4-2h8p
- 2026-10-29 Affected versions changed · Red Hat
References
Patch 8
- https://git.kernel.org/stable/c/c91fb72a2ca6480d8d77262eef52dc5b178463a3
- https://git.kernel.org/stable/c/de5a059e36657442b5637cc16df5163e435b9cb4
- https://git.kernel.org/stable/c/e0e14dd35d4242340c7346aac60c7ff8fbf87ffc
- https://git.kernel.org/stable/c/faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19
- https://git.kernel.org/stable/c/21b4c6d4d89030fd4657a8e7c8110fd941049794
- https://git.kernel.org/stable/c/bbad88f111a1829f366c189aa48e7e58e57553fc
- https://git.kernel.org/stable/c/30df4bef8b8e183333e9b6e9d4509d552c7da6eb
- https://git.kernel.org/stable/c/2b23b6097303ed0ba5f4bc036a1c07b6027af5c6
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- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2024-38544 · CVE Program
- CVE-2024-38544 · NVD
- FIRST EPSS
- GHSA-mqxf-7jx4-2h8p · GitHub Advisory Database · CC BY 4.0
- CVE-2024-38544 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences