All of
 help / color / mirror / Atom feed
From: Laszlo Ersek <>
Cc: Eric Dumazet <>,
	Lorenzo Colitti <>,
	Paolo Abeni <>,
	Pietro Borrello <>,,
Subject: [PATCH 0/2] tun/tap: set sk_uid from current_fsuid()
Date: Mon, 31 Jul 2023 18:42:35 +0200	[thread overview]
Message-ID: <> (raw)

The original patches fixing CVE-2023-1076 are incorrect in my opinion.
This small series fixes them up; see the individual commit messages for

I have a very elaborate test procedure demonstrating the problem for
both tun and tap; it involves libvirt, qemu, and "crash". I can share
that procedure if necessary, but it's indeed quite long (I wrote it
originally for our QE team).

The patches in this series are supposed to "re-fix" CVE-2023-1076; given
that said CVE is classified as Low Impact (CVSSv3=5.5), I'm posting this
publicly, and not suggesting any embargo. Red Hat Product Security may
assign a new CVE number later.

I've tested the patches on top of v6.5-rc4, with "crash" built at commit

Cc: Eric Dumazet <>
Cc: Lorenzo Colitti <>
Cc: Paolo Abeni <>
Cc: Pietro Borrello <>

Laszlo Ersek (2):
  net: tun_chr_open(): set sk_uid from current_fsuid()
  net: tap_open(): set sk_uid from current_fsuid()

 drivers/net/tap.c | 2 +-
 drivers/net/tun.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

base-commit: 5d0c230f1de8c7515b6567d9afba1f196fb4e2f4

             reply	other threads:[~2023-07-31 16:43 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-31 16:42 Laszlo Ersek [this message]
2023-07-31 16:42 ` [PATCH 1/2] net: tun_chr_open(): set sk_uid from current_fsuid() Laszlo Ersek
2023-07-31 16:42 ` [PATCH 2/2] net: tap_open(): " Laszlo Ersek
2023-08-03 16:43 ` [PATCH 0/2] tun/tap: " Jakub Kicinski

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.