rxrpc: Fix recv-recv race of completed call (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.27 % · percentile 20 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix recv-recv race of completed call If a call receives an event (such as incoming data), the call gets placed on the socket's queue and a thread in recvmsg can be awakened to go and process it. Once the thread has picked up the call off of the queue, further events will cause it to be requeued, and once the socket lock is dropped (recvmsg uses call->user_mutex to allow the socket to be used in parallel), a second thread can come in and its recvmsg can pop the call off the socket queue again. In such a case, the first thread will be receiving stuff from the call and the second thread will be blocked on call->user_mutex. The first thread can, at this point, process both the event that it picked call for and the event that the second thread picked the call for and may see the call terminate - in which case the call will be "released", decoupling the call from the user call ID assigned to it (RXRPC_USER_CALL_ID in the control message). The first thread will return okay, but then the second thread will wake up holding the user_mutex and, if it sees that the call has been released by the first thread, it will BUG thusly: kernel BUG at net/rxrpc/recvmsg.c:474! Fix this by just dequeuing the call and ignoring it if it is seen to be already released. We can't tell userspace about it anyway as the user call ID has become stale.
Weaknesses (CWE)
- CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization
References
- https://git.kernel.org/stable/c/4aed0eeca58e26d752bb08b293b8dc75c6820b23
- https://git.kernel.org/stable/c/cb720b068b18fb39c96980eb3c13f09427512be7
- https://git.kernel.org/stable/c/7692bde890061797f3dece0148d7859e85c55778
- https://git.kernel.org/stable/c/839fe96c15209dc2255c064bb44b636efe04f032
- https://git.kernel.org/stable/c/6c75a97a32a5fa2060c3dd30207e63b6914b606d
- https://git.kernel.org/stable/c/962fb1f651c2cf2083e0c3ef53ba69e3b96d3fbc
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | Linux |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
| CVSS 3.1 | MEDIUM 4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2025-27883
- GCVE · GCVE-0-2025-38524
CERT-FR advisories
- CERTFR-2026-AVI-0326 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0316 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0246 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0227 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0218 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0194 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0169 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1135 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1075 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1073 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1050 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0921 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0895 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0841 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0827 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0805 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0787 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.9 < 6.6.100cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.12.40cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.15.8cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 248f219cb8bcbfbd7f132752d44afa2df7c241d1 < 4aed0eeca58e26d752bb08b293b8dc75c6820b23 ; affected 248f219cb8bcbfbd7f132752d44afa2df7c241d1 < cb720b068b18fb39c96980eb3c13f09427512be7 ; affected 248f219cb8bcbfbd7f132752d44afa2df7c241d1 < 7692bde890061797f3dece0148d7859e85c55778 ; affected 248f219cb8bcbfbd7f132752d44afa2df7c241d1 < 839fe96c15209dc2255c064bb44b636efe04f032 ; affected 248f219cb8bcbfbd7f132752d44afa2df7c241d1 < 6c75a97a32a5fa2060c3dd30207e63b6914b606d ; affected 248f219cb8bcbfbd7f132752d44afa2df7c241d1 < 962fb1f651c2cf2083e0c3ef53ba69e3b96d3fbc |
| Linux · Linux | affected 4.9 ; unaffected 0 < 4.9 ; unaffected 5.10.266 ≤ 5.10.* ; unaffected 6.1.191 ≤ 6.1.* ; unaffected 6.6.100 ≤ 6.6.* ; unaffected 6.12.40 ≤ 6.12.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |