^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) .. _securitybugs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) Security bugs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) =============
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) Linux kernel developers take security very seriously. As such, we'd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) like to know when a security bug is found so that it can be fixed and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) disclosed as quickly as possible. Please report security bugs to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) Linux kernel security team.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) Contact
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) -------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) The Linux kernel security team can be contacted by email at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) <security@kernel.org>. This is a private list of security officers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) who will help verify the bug report and develop and release a fix.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) If you already have a fix, please include it with your report, as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) that can speed up the process considerably. It is possible that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) security team will bring in extra help from area maintainers to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) understand and fix the security vulnerability.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) As it is with any bug, the more information provided the easier it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) will be to diagnose and fix. Please review the procedure outlined in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) :doc:`reporting-bugs` if you are unclear about what
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) information is helpful. Any exploit code is very helpful and will not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) be released without consent from the reporter unless it has already been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) made public.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) Please send plain text emails without attachments where possible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) It is much harder to have a context-quoted discussion about a complex
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) issue if all the details are hidden away in attachments. Think of it like a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) :doc:`regular patch submission <../process/submitting-patches>`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) (even if you don't have a patch yet): describe the problem and impact, list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) reproduction steps, and follow it with a proposed fix, all in plain text.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) Disclosure and embargoed information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) ------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) The security list is not a disclosure channel. For that, see Coordination
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) below.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) Once a robust fix has been developed, the release process starts. Fixes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) for publicly known bugs are released immediately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) Although our preference is to release fixes for publicly undisclosed bugs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) as soon as they become available, this may be postponed at the request of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) the reporter or an affected party for up to 7 calendar days from the start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) of the release process, with an exceptional extension to 14 calendar days
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if it is agreed that the criticality of the bug requires more time. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) only valid reason for deferring the publication of a fix is to accommodate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) the logistics of QA and large scale rollouts which require release
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) coordination.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) While embargoed information may be shared with trusted individuals in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) order to develop a fix, such information will not be published alongside
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) the fix or on any other disclosure channel without the permission of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) reporter. This includes but is not limited to the original bug report
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) and followup discussions (if any), exploits, CVE information or the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) identity of the reporter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) In other words our only interest is in getting bugs fixed. All other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) information submitted to the security list and any followup discussions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) of the report are treated confidentially even after the embargo has been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) lifted, in perpetuity.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) Coordination
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) ------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) Fixes for sensitive bugs, such as those that might lead to privilege
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) escalations, may need to be coordinated with the private
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) <linux-distros@vs.openwall.org> mailing list so that distribution vendors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) are well prepared to issue a fixed kernel upon public disclosure of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) upstream fix. Distros will need some time to test the proposed patch and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) will generally request at least a few days of embargo, and vendor update
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) publication prefers to happen Tuesday through Thursday. When appropriate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) the security team can assist with this coordination, or the reporter can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) include linux-distros from the start. In this case, remember to prefix
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) the email Subject line with "[vs]" as described in the linux-distros wiki:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) <http://oss-security.openwall.org/wiki/mailing-lists/distros#how-to-use-the-lists>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) CVE assignment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) --------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) The security team does not normally assign CVEs, nor do we require them
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) for reports or fixes, as this can needlessly complicate the process and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) may delay the bug handling. If a reporter wishes to have a CVE identifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) assigned ahead of public disclosure, they will need to contact the private
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) linux-distros list, described above. When such a CVE identifier is known
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) before a patch is provided, it is desirable to mention it in the commit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) message if the reporter agrees.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) Non-disclosure agreements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) -------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) The Linux kernel security team is not a formal body and therefore unable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) to enter any non-disclosure agreements.