Bug 2176140 (CVE-2023-1252)
| Summary: | CVE-2023-1252 kernel: ovl: fix use after free in struct ovl_aio_req | ||
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| Product: | [Other] Security Response | Reporter: | Alex <allarkin> |
| Component: | vulnerability | Assignee: | Nobody <nobody> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | acaringi, bhu, chwhite, crwood, ddepaula, debarbos, dfreiber, drow, dvlasenk, ezulian, fhrbata, hkrzesin, jarod, jburrell, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, lgoncalv, lzampier, nmurray, ptalbert, qzhao, rogbas, rvrbovsk, scweaver, tyberry, vkumar, walters, williams |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Linux kernel 5.16-rc1 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A use-after-free flaw was found in the Linux kernel’s Ext4 File System in how a user triggers several file operations simultaneously with the overlay FS usage. This flaw allows a local user to crash or potentially escalate their privileges on the system. Only if patch 9a2544037600 ("ovl: fix use after free in struct ovl_aio_req") not applied yet, the kernel could be affected.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 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: | 2176141, 2176159, 2176160, 2176161, 2176162 | ||
| Bug Blocks: | 2156315 | ||
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 2176141] This was fixed for Fedora with the 5.14.19 stable kernel updates. This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2023:6583 https://access.redhat.com/errata/RHSA-2023:6583 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2023:6901 https://access.redhat.com/errata/RHSA-2023:6901 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2023:7077 https://access.redhat.com/errata/RHSA-2023:7077 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Extended Update Support Via RHSA-2024:0724 https://access.redhat.com/errata/RHSA-2024:0724 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Extended Update Support Via RHSA-2024:8107 https://access.redhat.com/errata/RHSA-2024:8107 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Extended Update Support Via RHSA-2024:8614 https://access.redhat.com/errata/RHSA-2024:8614 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Extended Update Support Via RHSA-2024:8613 https://access.redhat.com/errata/RHSA-2024:8613 |
A flaw found in the Linux Kernel. For the Ext4 file system if overlay FS being used, use after free could happen as result of the race condition. The bug actual if patch 9a2544037600 not applied yet. Example for triggering in a overlay on ext4 setup: aio_read ovl_read_iter vfs_iter_read ext4_file_read_iter ext4_dio_read_iter iomap_dio_rw -> -EIOCBQUEUED /* * Here IO is completed in a separate thread, * ovl_aio_cleanup_handler() frees aio_req which has iocb embedded */ file_accessed(iocb->ki_filp); /**BOOM**/ Reference: https://lore.kernel.org/lkml/20211115165433.449951285@linuxfoundation.org/