# CVE-2022-49065: linux: In the Linux kernel, the following vulnerability has been resolved:  SUNRPC: Fix the svc_deferred_event trace class...

CVE-2022-49065 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49065, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49065
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0064
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  SUNRPC: Fix the svc_deferred_event trace class  Fix a NULL deref crash that occurs when an svc_rqst is deferred while the sunrpc tracing subsystem is enabled. svc_revisit() sets dr->xprt to NULL, so it can't be relied upon in the tracepoint to provide the remote's address.  Unfortunately we can't revert the "svc_deferred_class" hunk in commit ece200ddd54b ("sunrpc: Save remote presentation address in svc_xprt for trace events") because there is now a specific check of event format specifiers for unsafe dereferences. The warning that check emits is:    event svc_defer_recv has unsafe dereference of argument 1  A "%pISpc" format specifier with a "struct sockaddr *" is indeed flagged by this check.  Instead, take the brute-force approach used by the svcrdma_qp_error tracepoint. Convert the dr::addr field into a presentation address in the TP_fast_assign() arm of the trace event, and store that as a string. This fix can be backported to -stable kernels.  In the meantime, commit c6ced22997ad ("tracing: Update print fmt check to handle new __get_sockaddr() macro") is now in v5.18, so this wonky fix can be replaced with __sockaddr() and friends properly during the v5.19 merge window.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.17.6-1 | [DEBIAN-CVE-2022-49065](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49065.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.17.6-1 | [DEBIAN-CVE-2022-49065](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49065.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.17.6-1 | [DEBIAN-CVE-2022-49065](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49065.md) | Feb 26, 2025 |

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