Bug 1999544 (CVE-2021-3752)
| Summary: | CVE-2021-3752 kernel: possible use-after-free in bluetooth module | ||
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| Product: | [Other] Security Response | Reporter: | Marian Rehak <mrehak> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | acaringi, adscvr, airlied, alciregi, allarkin, bhu, brdeoliv, bskeggs, chwhite, crwood, dhoward, dvlasenk, fhrbata, fpacheco, gtiwari, hdegoede, hkrzesin, jarod, jarodwilson, jeremy, jforbes, jglisse, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, security-response-team, steved, vkumar, walters, williams |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | kernel 5.15.3 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A use-after-free flaw was found in the Linux kernel’s Bluetooth subsystem in the way user calls connect to the socket and disconnect simultaneously due to a race condition. This flaw allows a user to crash the system or escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2022-05-11 09:15:35 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2004506, 2005687, 2005688, 2005689, 2005690, 2005691, 2005692 | ||
| Bug Blocks: | 1999084, 1999567 | ||
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Description
Marian Rehak
2021-08-31 09:15:55 UTC
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 2004506] Hi Alex , Any news on this ? Thanks Gopal In reply to comment #12: > Hi Alex , > > Any news on this ? > > Thanks > Gopal Hi Gopal, I see that "Bluetooth: fix use-after-free error in lock_sock_nested()" included to 5.10.84-1: https://packages.qa.debian.org/l/linux/news/20211209T191708Z.html , and the newer patch https://lore.kernel.org/lkml/20211115165435.133245729@linuxfoundation.org/ looks like reworked older patch https://lore.kernel.org/lkml/20210714031733.1395549-1-bobo.shaobowang@huawei.com/ Could you please check this and if this is correct, then go on with https://lore.kernel.org/lkml/20211115165435.133245729@linuxfoundation.org/ ? Thank you. Alex (In reply to Alex from comment #13) > In reply to comment #12: > > Hi Alex , > > > > Any news on this ? > > > > Thanks > > Gopal > > Hi Gopal, > > I see that "Bluetooth: fix use-after-free error in lock_sock_nested()" > included to 5.10.84-1: > https://packages.qa.debian.org/l/linux/news/20211209T191708Z.html > , and the newer patch > https://lore.kernel.org/lkml/20211115165435.133245729@linuxfoundation.org/ > looks like reworked older patch > https://lore.kernel.org/lkml/20210714031733.1395549-1-bobo.shaobowang@huawei. > com/ > > Could you please check this and if this is correct, then go on with > https://lore.kernel.org/lkml/20211115165435.133245729@linuxfoundation.org/ > ? > > Thank you. > Alex Yeah I see https://lore.kernel.org/lkml/20211115165435.133245729@linuxfoundation.org/ merged to 5.15 commit 1bff51ea59a9afb67d2dd78518ab0582a54a472c Author: Wang ShaoBo <bobo.shaobowang> Date: Tue Aug 31 17:35:37 2021 -0700 Bluetooth: fix use-after-free error in lock_sock_nested() use-after-free error in lock_sock_nested is reported: [ 179.140137][ T3731] ===================================================== [ 179.142675][ T3731] BUG: KMSAN: use-after-free in lock_sock_nested+0x280/0x2c0 [ 179.145494][ T3731] CPU: 4 PID: 3731 Comm: kworker/4:2 Not tainted 5.12.0-rc6+ #54 [ 179.148432][ T3731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/0104 [ 179.151806][ T3731] Workqueue: events l2cap_chan_timeout [ 179.152730][ T3731] Call Trace: [ 179.153301][ T3731] dump_stack+0x24c/0x2e0 [ 179.154063][ T3731] kmsan_report+0xfb/0x1e0 [ 179.154855][ T3731] __msan_warning+0x5c/0xa0 [ 179.155579][ T3731] lock_sock_nested+0x280/0x2c0 [ 179.156436][ T3731] ? kmsan_get_metadata+0x116/0x180 Thanks for the details. Gopal .. This was fixed for Fedora with the 5.15.3 stable kernel updates. This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2022:0620 https://access.redhat.com/errata/RHSA-2022:0620 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2022:0622 https://access.redhat.com/errata/RHSA-2022:0622 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2022:1975 https://access.redhat.com/errata/RHSA-2022:1975 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2022:1988 https://access.redhat.com/errata/RHSA-2022:1988 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-3752 |