CVE-2024-35841
- Source
- https://cve.org/CVERecord?id=CVE-2024-35841
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35841.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-35841
- Downstream
- Related
- Published
- 2024-05-17T14:27:31Z
- Modified
- 2026-08-12T03:51:18Z
- Summary
- net: tls, fix WARNIING in __sk_msg_free
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: tls, fix WARNIING in __sk_msg_free
A splice with MSG_SPLICE_PAGES will cause tls code to use the tls_sw_sendmsg_splice path in the TLS sendmsg code to move the user provided pages from the msg into the msg_pl. This will loop over the msg until msg_pl is full, checked by sk_msg_full(msg_pl). The user can also set the MORE flag to hint stack to delay sending until receiving more pages and ideally a full buffer.
If the user adds more pages to the msg than can fit in the msg_pl scatterlist (MAX_MSG_FRAGS) we should ignore the MORE flag and send the buffer anyways.
What actually happens though is we abort the msg to msg_pl scatterlist setup and then because we forget to set 'full record' indicating we can no longer consume data without a send we fallthrough to the 'continue' path which will check if msg_data_left(msg) has more bytes to send and then attempts to fit them in the already full msg_pl. Then next iteration of sender doing send will encounter a full msg_pl and throw the warning in the syzbot report.
To fix simply check if we have a full_record in splice code path and if not send the msg regardless of MORE flag.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35841.json" }- References
-
- https://git.kernel.org/stable/c/02e368eb1444a4af649b73cbe2edd51780511d86
- https://git.kernel.org/stable/c/294e7ea85f34748f04e5f3f9dba6f6b911d31aa8
- https://git.kernel.org/stable/c/dc9dfc8dc629e42f2234e3327b75324ffc752bc9
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35841.json
- https://nvd.nist.gov/vuln/detail/CVE-2024-35841
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git