linux: In the Linux kernel, the following vulnerability has been resolved: tcp: take care of mixed splice()/sendmsg(MSG_ZER...
CVE-2022-48819 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48819, released July 16, 2024. It is not reported as exploited. Patch Radar priority: Routine.
In the Linux kernel, the following vulnerability has been resolved: tcp: take care of mixed splice()/sendmsg(MSG_ZEROCOPY) case syzbot found that mixing sendpage() and sendmsg(MSG_ZEROCOPY) calls over the same TCP socket would again trigger the infamous warning in inet_sock_destruct() WARN_ON(sk_forward_alloc_get(sk)); While Talal took into account a mix of regular copied data and MSG_ZEROCOPY one in the same skb, the sendpage() path has been forgotten. We want the charging to happen for sendpage(), because pages could be coming from a pipe. What is missing is the downgrading of pure zerocopy status to make sure sk_forward_alloc will stay synced. Add tcp_downgrade_zcopy_pure() helper so that we can use it from the two callers.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 5.16.10-1 | DEBIAN-CVE-2022-48819 | Jul 16, 2024 |
| linux · Debian 13.5 (trixie) | 5.16.10-1 | DEBIAN-CVE-2022-48819 | Jul 16, 2024 |
| linux · Debian 14 | 5.16.10-1 | DEBIAN-CVE-2022-48819 | Jul 16, 2024 |
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