In the Linux kernel, the following vulnerability has been resolved: net/tls: Fix flipped sign in tls_err_abort() calls sk->sk_err appears to expect a positive value, a convention that ktls doesn’t always follow and that leads to memory corruption in other code. For instance, [kworker] tls_encrypt_done(…, err=<negative error from crypto request>) tls_err_abort(…, err) sk->sk_err = err; [task] splice_from_pipe_feed … tls_sw_do_sendpage if (sk->sk_err) { ret = -sk->sk_err; // ret is positive splice_from_pipe_feed (continued) ret = actor(…) // ret is still positive and interpreted as bytes // written, resulting in underflow of buf->len and // sd->len, leading to huge buf->offset and bogus // addresses computed in later calls to actor() Fix all tls_err_abort() callers to pass a negative error code consistently and centralize the error-prone sign flip there, throwing in a warning to catch future misuse and uninlining the function so it really does only warn once.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | linux | < 5.15.3-1 | linux_5.15.3-1_all.deb |
Debian | 11 | all | linux | < 5.10.84-1 | linux_5.10.84-1_all.deb |
Debian | 10 | all | linux | <= 4.19.249-2 | linux_4.19.249-2_all.deb |
Debian | 999 | all | linux | < 5.15.3-1 | linux_5.15.3-1_all.deb |
Debian | 13 | all | linux | < 5.15.3-1 | linux_5.15.3-1_all.deb |