CVE-2022-49065
SUNRPC: Fix the svc_deferred_event trace class
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.64% · top 49% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
- affected ece200ddd54b9ce840cfee554fb812560c545c7d – < 85ee17ca21cf92989e8c923e3ea4514c291e9d38
- affected ece200ddd54b9ce840cfee554fb812560c545c7d – < 726ae7300fcc25fefa46d188cc07eb16dc908f9e
- affected ece200ddd54b9ce840cfee554fb812560c545c7d – < c2456f470eea3bd06574d988bf6089e7c3f4c5cc
- affected ece200ddd54b9ce840cfee554fb812560c545c7d – < 4d5004451ab2218eab94a30e1841462c9316ba19
- affected 4.17
- unaffected < 4.17
- unaffected 5.10.112 – ≤ 5.10.*
- unaffected 5.15.35 – ≤ 5.15.*
- unaffected 5.17.4 – ≤ 5.17.*
- unaffected 5.18 – ≤ *
References (4)
- https://git.kernel.org/stable/c/85ee17ca21cf92989e8c923e3ea4514c291e9d38 (opens in a new tab)
- https://git.kernel.org/stable/c/726ae7300fcc25fefa46d188cc07eb16dc908f9e (opens in a new tab)
- https://git.kernel.org/stable/c/c2456f470eea3bd06574d988bf6089e7c3f4c5cc (opens in a new tab)
- https://git.kernel.org/stable/c/4d5004451ab2218eab94a30e1841462c9316ba19 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49065)Record last updated .