CVE-2024-37078 Affecting kernel-source-azure package, versions <6.4.0-150600.8.8.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-SLES156-KERNELSOURCEAZURE-7680867
- published14 Aug 2024
- disclosed13 Aug 2024
Introduced: 13 Aug 2024
CVE-2024-37078 (opens in a new tab)How to fix?
Upgrade SLES:15.6 kernel-source-azure to version 6.4.0-150600.8.8.2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-source-azure package and not the kernel-source-azure package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix potential kernel bug due to lack of writeback flag waiting
Destructive writes to a block device on which nilfs2 is mounted can cause a kernel bug in the folio/page writeback start routine or writeback end routine (__folio_start_writeback in the log below):
kernel BUG at mm/page-writeback.c:3070! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI ... RIP: 0010:__folio_start_writeback+0xbaa/0x10e0 Code: 25 ff 0f 00 00 0f 84 18 01 00 00 e8 40 ca c6 ff e9 17 f6 ff ff e8 36 ca c6 ff 4c 89 f7 48 c7 c6 80 c0 12 84 e8 e7 b3 0f 00 90 <0f> 0b e8 1f ca c6 ff 4c 89 f7 48 c7 c6 a0 c6 12 84 e8 d0 b3 0f 00 ... Call Trace: <TASK> nilfs_segctor_do_construct+0x4654/0x69d0 [nilfs2] nilfs_segctor_construct+0x181/0x6b0 [nilfs2] nilfs_segctor_thread+0x548/0x11c0 [nilfs2] kthread+0x2f0/0x390 ret_from_fork+0x4b/0x80 ret_from_fork_asm+0x1a/0x30 </TASK>
This is because when the log writer starts a writeback for segment summary blocks or a super root block that use the backing device's page cache, it does not wait for the ongoing folio/page writeback, resulting in an inconsistent writeback state.
Fix this issue by waiting for ongoing writebacks when putting folios/pages on the backing device into writeback state.
References
- https://www.suse.com/security/cve/CVE-2024-37078.html
- https://bugzilla.suse.com/1227066
- https://git.kernel.org/stable/c/0ecfe3a92869a59668d27228dabbd7965e83567f
- https://git.kernel.org/stable/c/1f3bff69f1214fe03a02bc650d5bbfaa6e65ae7d
- https://git.kernel.org/stable/c/271dcd977ccda8c7a26e360425ae7b4db7d2ecc0
- https://git.kernel.org/stable/c/33900d7eae616647e179eee1c66ebe654ee39627
- https://git.kernel.org/stable/c/614d397be0cf43412b3f94a0f6460eddced8ce92
- https://git.kernel.org/stable/c/95f6f81e50d858a7c9aa7c795ec14a0ac3819118
- https://git.kernel.org/stable/c/a4ca369ca221bb7e06c725792ac107f0e48e82e7
- https://git.kernel.org/stable/c/a75b8f493dfc48aa38c518430bd9e03b53bffebe