CVE-2023-2269
First published: Tue Apr 25 2023(Updated: )
A bug in the Linux kernel version 6.2.0 by syzkaller with our own templates. The bug causes a possible recursive locking scenario, resulting in a deadlock. The key trace is as follows: down_read+0x9d/0x450 kernel/locking/rwsem.c:1509 dm_get_inactive_table+0x2b/0xc0 drivers/md/dm-ioctl.c:773 __dev_status+0x4fd/0x7c0 drivers/md/dm-ioctl.c:844 table_clear+0x197/0x280 drivers/md/dm-ioctl.c:1537 In table_clear, it acquires a write lock <a href="https://elixir.bootlin.com/linux/v6.2/source/drivers/md/dm-ioctl.c#L1520">https://elixir.bootlin.com/linux/v6.2/source/drivers/md/dm-ioctl.c#L1520</a> down_write(&_hash_lock); Then before the lock is released at L1539, there is a path shown above: table_clear -> __dev_status -> dm_get_inactive_table -> down_read <a href="https://elixir.bootlin.com/linux/v6.2/source/drivers/md/dm-ioctl.c#L773">https://elixir.bootlin.com/linux/v6.2/source/drivers/md/dm-ioctl.c#L773</a> down_read(&_hash_lock); It tries to acquire the same read lock again, resulting in the deadlock problem
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 | |
| Linux Kernel | =6.2 | |
| Fedora | =36 | |
| Fedora | =37 | |
| Fedora | =38 | |
| Debian | =10.0 | |
| Debian | =11.0 | |
| Debian | =12.0 | |
| All of | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| All of | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| All of | ||
| netapp h700s firmware | ||
| netapp h700s | ||
| All of | ||
| netapp h410s firmware | ||
| netapp h410s | ||
| All of | ||
| netapp h410c firmware | ||
| netapp h410c |
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Reference Links
- https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/63AJUCJTZCII2JMAF7MGZEM66KY7IALT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FBLBKW2WM5YSTS6OGEU5SYHXSJ5EWSTV/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IXHBLWYNSUBS77TYPOJTADPDXKBH2F4U/
- https://lore.kernel.org/lkml/ZD1xyZxb3rHot8PV@redhat.com/t/
- https://security.netapp.com/advisory/ntap-20230929-0004/
- https://www.debian.org/security/2023/dsa-5448
- https://www.debian.org/security/2023/dsa-5480
- https://launchpad.net/bugs/cve/CVE-2023-2269
- https://exchange.xforce.ibmcloud.com/vulnerabilities/253813
- https://www.ibm.com/support/pages/node/7144861 (Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/63AJUCJTZCII2JMAF7MGZEM66KY7IALT/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FBLBKW2WM5YSTS6OGEU5SYHXSJ5EWSTV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IXHBLWYNSUBS77TYPOJTADPDXKBH2F4U/
- https://lore.kernel.org/lkml/ZD1xyZxb3rHot8PV%40redhat.com/t/
- https://elixir.bootlin.com/linux/v6.2/source/drivers/md/dm-ioctl.c#L1520
- https://elixir.bootlin.com/linux/v6.2/source/drivers/md/dm-ioctl.c#L773
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2189394
- https://bugzilla.redhat.com/show_bug.cgi?id=2189388
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2269
- https://nvd.nist.gov/vuln/detail/CVE-2023-2269
- https://security-tracker.debian.org/tracker/CVE-2023-2269
- https://ubuntu.com/security/CVE-2023-2269
Frequently Asked Questions
What is the severity of CVE-2023-2269?
CVE-2023-2269 is classified as a moderate severity vulnerability due to the possibility of causing a deadlock in the Linux kernel.
How do I fix CVE-2023-2269?
To fix CVE-2023-2269, upgrade to a patched version of the Linux kernel such as 5.10.223-1 or later.
Which versions of Linux are affected by CVE-2023-2269?
CVE-2023-2269 affects Linux kernel version 6.2 and specific versions of Fedora and Debian.
What can happen if CVE-2023-2269 is exploited?
Exploitation of CVE-2023-2269 can lead to a system deadlock, rendering the system unresponsive.
Is there a workaround for CVE-2023-2269?
There is no known workaround for CVE-2023-2269; the best mitigation is to apply the available updates.
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