RDMA/rxe: Fix double free in rxe_srq_from_init
Priority LOW 35CWE-415Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 27 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-415 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix double free in rxe_srq_from_init In rxe_srq_from_init(), the queue pointer 'q' is assigned to 'srq->rq.queue' before copying the SRQ number to user space. If copy_to_user() fails, the function calls rxe_queue_cleanup() to free the queue, but leaves the now-invalid pointer in 'srq->rq.queue'. The caller of rxe_srq_from_init() (rxe_create_srq) eventually calls rxe_srq_cleanup() upon receiving the error, which triggers a second rxe_queue_cleanup() on the same memory, leading to a double free. The call trace looks like this: kmem_cache_free+0x.../0x... rxe_queue_cleanup+0x1a/0x30 [rdma_rxe] rxe_srq_cleanup+0x42/0x60 [rdma_rxe] rxe_elem_release+0x31/0x70 [rdma_rxe] rxe_create_srq+0x12b/0x1a0 [rdma_rxe] ib_create_srq_user+0x9a/0x150 [ib_core] Fix this by moving 'srq->rq.queue = q' after copy_to_user.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00199 9th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.20, 5.10.259, 5.15.210 +6Red Hat: 15 advisoriesRed Hat: 27 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
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 | 4.19.86 to before 4.20 | 4.20 | Patch available | CNA |
| Linux | Linux | 4.20 and later | 5.10.259, 5.15.210, 6.1.176, 6.6.128, 6.12.75, 6.18.14, 6.19.4, 7.0 | Patch available | CNA |
- Linux VendorLinux Affected 4.19.86 to before 4.20 Fixed in 4.20 Patch available CNA
- Linux VendorLinux Affected 4.20 and later Fixed in 5.10.259, 5.15.210, 6.1.176, 6.6.128, 6.12.75, 6.18.14, 6.19.4, 7.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.19.86 to before 5.10.259; 5.11 to before 5.15.210; 5.16 to before 6.1.176; 6.2 to before 6.6.128; 6.7 to before 6.12.75; 6.13 to before 6.18.14; 6.19 to before 6.19.4 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.86 to before 5.10.259; 5.11 to before 5.15.210; 5.16 to before 6.1.176; 6.2 to before 6.6.128; 6.7 to before 6.12.75; 6.13 to before 6.18.14; 6.19 to before 6.19.4 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.20
- Fix · CNA Linux (Linux) Fixed in 5.10.259, 5.15.210, 6.1.176, 6.6.128, 6.12.75, 6.18.14, 6.19.4, 7.0
Red Hat 15 advisories
- RHSA-2026:72830 Released 2026-09-29 · Red Hat rating Importantkpatch-patch-5_14_0-570_116_1, kpatch-patch-5_14_0-570_135_1, kpatch-patch-5_14_0-570_39_1, kpatch-patch-5_14_0-570_66_1, and kpatch-patch-5_14_0-570_94_1 security update
- Red Hat Enterprise Linux BaseOS EUS (v.9.6) kpatch-patch-5_14_0-570_116_1-1-10.el9_6, kpatch-patch-5_14_0-570_135_1-1-1.el9_6, kpatch-patch-5_14_0-570_39_1-1-16.el9_6 +2
- RHSA-2026:72832 Released 2026-09-29 · Red Hat rating Importantkpatch-patch-5_14_0-687_10_1 security update
- Red Hat Enterprise Linux BaseOS (v. 9) kpatch-patch-5_14_0-687_10_1-1-9.el9_8
- RHSA-2026:72629 Released 2026-09-28 · Red Hat rating Importantkpatch-patch-4_18_0-553_109_1, kpatch-patch-4_18_0-553_125_1, kpatch-patch-4_18_0-553_158_1, kpatch-patch-4_18_0-553_72_1, and kpatch-patch-4_18_0-553_85_1 security update
- Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-553_109_1-1-12.el8_10, kpatch-patch-4_18_0-553_125_1-1-9.el8_10, kpatch-patch-4_18_0-553_158_1-1-1.el8_10 +2
Show 12 more Red Hat advisories
- RHSA-2026:72630 Released 2026-09-28 · Red Hat rating Importantkpatch-patch-5_14_0-427_100_1, kpatch-patch-5_14_0-427_113_1, kpatch-patch-5_14_0-427_126_1, kpatch-patch-5_14_0-427_146_1, and kpatch-patch-5_14_0-427_84_1 security update
- Red Hat Enterprise Linux BaseOS E4S (v.9.4) kpatch-patch-5_14_0-427_100_1-1-15.el9_4, kpatch-patch-5_14_0-427_113_1-1-13.el9_4, kpatch-patch-5_14_0-427_126_1-1-10.el9_4 +2
- RHSA-2026:72627 Released 2026-09-28 · Red Hat rating Importantkpatch-patch-4_18_0-477_107_1, kpatch-patch-4_18_0-477_120_1, kpatch-patch-4_18_0-477_130_1, kpatch-patch-4_18_0-477_143_1, and kpatch-patch-4_18_0-477_161_1 security update
- Red Hat Enterprise Linux BaseOS E4S (v.8.8) kpatch-patch-4_18_0-477_107_1-1-15.el8_8, kpatch-patch-4_18_0-477_120_1-1-14.el8_8, kpatch-patch-4_18_0-477_130_1-1-12.el8_8 +2
- RHSA-2026:41236 Released 2026-07-17 · Red Hat rating Criticalkernel-rt security, bug fix, and enhancement update
- Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-debug-3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-debug-devel-3.10.0-1160.155.1.rt56.1307.el7 +4
- RHSA-2026:35896 Released 2026-07-06 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.197.1.el8_4, kernel-4.18.0-305.197.1.el8_4, kernel-abi-stablelists-4.18.0-305.197.1.el8_4 +14
- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.197.1.el8_4, kernel-4.18.0-305.197.1.el8_4, kernel-abi-stablelists-4.18.0-305.197.1.el8_4 +14
- RHSA-2026:35863 Released 2026-07-06 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.150.1.el8_8, kernel-4.18.0-477.150.1.el8_8, kernel-abi-stablelists-4.18.0-477.150.1.el8_8 +14
- Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.150.1.el8_8, kernel-4.18.0-477.150.1.el8_8, kernel-abi-stablelists-4.18.0-477.150.1.el8_8 +14
- RHSA-2026:35844 Released 2026-07-06 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.154.1.el7, kernel-3.10.0-1160.154.1.el7, kernel-abi-whitelists-3.10.0-1160.154.1.el7 +11
- Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.154.1.el7, kernel-tools-libs-devel-3.10.0-1160.154.1.el7
- RHSA-2026:34094 Released 2026-07-01 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.125.1.el9_6, libperf-5.14.0-570.125.1.el9_6
- Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.125.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.125.1.el9_6, kernel-64k-devel-5.14.0-570.125.1.el9_6 +12
- Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.125.1.el9_6, kernel-64k-5.14.0-570.125.1.el9_6, kernel-64k-core-5.14.0-570.125.1.el9_6 +28
- Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.125.1.el9_6, kernel-rt-64k-5.14.0-570.125.1.el9_6, kernel-rt-64k-core-5.14.0-570.125.1.el9_6 +21
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.125.1.el9_6, kernel-rt-core-5.14.0-570.125.1.el9_6, kernel-rt-debug-5.14.0-570.125.1.el9_6 +11
- RHSA-2026:33899 Released 2026-07-01 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.198.1.el8_6, kernel-4.18.0-372.198.1.el8_6, kernel-abi-stablelists-4.18.0-372.198.1.el8_6 +14
- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.198.1.el8_6, kernel-4.18.0-372.198.1.el8_6, kernel-abi-stablelists-4.18.0-372.198.1.el8_6 +14
- RHSA-2026:27713 Released 2026-06-22 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.134.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.134.1.el9_4, kernel-64k-devel-5.14.0-427.134.1.el9_4 +11
- Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.134.1.el9_4, kernel-5.14.0-427.134.1.el9_4, kernel-64k-5.14.0-427.134.1.el9_4 +29
- Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.134.1.el9_4, kernel-rt-core-5.14.0-427.134.1.el9_4, kernel-rt-debug-5.14.0-427.134.1.el9_4 +9
- Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.134.1.el9_4, kernel-rt-core-5.14.0-427.134.1.el9_4, kernel-rt-debug-5.14.0-427.134.1.el9_4 +11
- RHSA-2026:25217 Released 2026-06-11 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.15.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.15.1.el9_8, kernel-64k-devel-5.14.0-687.15.1.el9_8 +12
- Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.15.1.el9_8, kernel-64k-5.14.0-687.15.1.el9_8, kernel-64k-core-5.14.0-687.15.1.el9_8 +28
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.15.1.el9_8, libperf-5.14.0-687.15.1.el9_8
- Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.15.1.el9_8, kernel-rt-64k-5.14.0-687.15.1.el9_8, kernel-rt-64k-core-5.14.0-687.15.1.el9_8 +21
- Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.15.1.el9_8, kernel-rt-core-5.14.0-687.15.1.el9_8, kernel-rt-debug-5.14.0-687.15.1.el9_8 +9
- RHSA-2026:25121 Released 2026-06-10 · Red Hat rating Criticalkernel security update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.132.1.el8_10, kernel-4.18.0-553.132.1.el8_10, kernel-abi-stablelists-4.18.0-553.132.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.132.1.el8_10
- RHSA-2026:25120 Released 2026-06-10 · Red Hat rating Criticalkernel-rt security update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-core-4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-debug-4.18.0-553.132.1.rt7.473.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-core-4.18.0-553.132.1.rt7.473.el8_10, kernel-rt-debug-4.18.0-553.132.1.rt7.473.el8_10 +7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat CodeReady Linux Builder EUS (v.9.6) | Fixed | RHSA-2026:34094 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:25217 |
| Red Hat Enterprise Linux AppStream E4S (v.9.4) | Fixed | RHSA-2026:27713 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:34094 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2026:25121, RHSA-2026:72629 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2026:25217, RHSA-2026:72832 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.4) | Fixed | RHSA-2026:35896 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.6) | Fixed | RHSA-2026:33899 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.8) | Fixed | RHSA-2026:35863, RHSA-2026:72627 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.4) | Fixed | RHSA-2026:27713, RHSA-2026:72630 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.6) | Fixed | RHSA-2026:34094, RHSA-2026:72830 |
| Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | Fixed | RHSA-2026:35896 |
| Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) | Fixed | RHSA-2026:33899 |
| Red Hat Enterprise Linux BaseOS TUS (v.8.8) | Fixed | RHSA-2026:35863 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2026:25121 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2026:25217 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2026:25120 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2026:25120 |
| Red Hat Enterprise Linux Real Time (v. 9) | Fixed | RHSA-2026:25217 |
| Red Hat Enterprise Linux Real Time E4S (v.9.4) | Fixed | RHSA-2026:27713 |
| Red Hat Enterprise Linux Real Time EUS (v.9.6) | Fixed | RHSA-2026:34094 |
| Red Hat Enterprise Linux Real Time for NFV (v. 9) | Fixed | RHSA-2026:25217 |
| Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) | Fixed | RHSA-2026:27713 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) | Fixed | RHSA-2026:34094 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2026:35844 |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Fixed | RHSA-2026:35844 |
| Red Hat Enterprise Linux for Real Time (v. 7 ELS) | Fixed | RHSA-2026:41236 |
Not affected: 2 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2026-45852
- 2026-10-03 Alias added: GHSA-m5rc-6p5x-73gp
- 2026-10-16 CISA SSVC decision points changed
- 2026-10-19 Weakness changed · CISA ADP
References
Patch 8
- https://git.kernel.org/stable/c/b98ab5494dbd48652561aa0b9c32f10500220745
- https://git.kernel.org/stable/c/d493e0bfc748a520c349d6c8791b262aa5ad2e4e
- https://git.kernel.org/stable/c/9abff51163aa1bc275ec356f74fe976291860a7f
- https://git.kernel.org/stable/c/26793db60925df1e88a29466813d586cbc190b8c
- https://git.kernel.org/stable/c/ce6f8e007682f378279d4cf83b240f12d52c723b
- https://git.kernel.org/stable/c/5c07aef09a121a4cd622a71eb0753a9e135c84a8
- https://git.kernel.org/stable/c/26a9cfe12f4ffdeaa136f252478986fa5f397ddc
- https://git.kernel.org/stable/c/0beefd0e15d962f497aad750b2d5e9c3570b66d1
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Sources
- CVE-2026-45852 · CVE Program
- CVE-2026-45852 · NVD
- FIRST EPSS
- GHSA-m5rc-6p5x-73gp · GitHub Advisory Database · CC BY 4.0
- CVE-2026-45852 · Red Hat security data · CC BY 4.0
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