cve-2024-35841
Vulnerability from cvelistv5
Published
2024-05-17 14:27
Modified
2024-11-05 09:23
Severity ?
Summary
net: tls, fix WARNIING in __sk_msg_free
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/02e368eb1444a4af649b73cbe2edd51780511d86
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/294e7ea85f34748f04e5f3f9dba6f6b911d31aa8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dc9dfc8dc629e42f2234e3327b75324ffc752bc9
Impacted products
Vendor Product Version
Linux Linux Version: 6.5
Show details on NVD website

To clipboard 

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                "id": "CVE-2024-35841",
                "options": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tls, fix WARNIING in __sk_msg_free\n\nA splice with MSG_SPLICE_PAGES will cause tls code to use the\ntls_sw_sendmsg_splice path in the TLS sendmsg code to move the user\nprovided pages from the msg into the msg_pl. This will loop over the\nmsg until msg_pl is full, checked by sk_msg_full(msg_pl). The user\ncan also set the MORE flag to hint stack to delay sending until receiving\nmore pages and ideally a full buffer.\n\nIf the user adds more pages to the msg than can fit in the msg_pl\nscatterlist (MAX_MSG_FRAGS) we should ignore the MORE flag and send\nthe buffer anyways.\n\nWhat actually happens though is we abort the msg to msg_pl scatterlist\nsetup and then because we forget to set \u0027full record\u0027 indicating we\ncan no longer consume data without a send we fallthrough to the \u0027continue\u0027\npath which will check if msg_data_left(msg) has more bytes to send and\nthen attempts to fit them in the already full msg_pl. Then next\niteration of sender doing send will encounter a full msg_pl and throw\nthe warning in the syzbot report.\n\nTo fix simply check if we have a full_record in splice code path and\nif not send the msg regardless of MORE flag."
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    "dateReserved": "2024-05-17T13:50:33.104Z",
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