# CVE-2024-49903: linux: In the Linux kernel, the following vulnerability has been resolved:  jfs: Fix uaf in dbFreeBits  [syzbot reported] ==...

CVE-2024-49903 is fixed in 44 products on 1 platform, first by DEBIAN-CVE-2024-49903, released October 21, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-49903
- Priority: High
- CVSS: 7.0 (high)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  jfs: Fix uaf in dbFreeBits  [syzbot reported] ================================================================== BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/mutex.c:587 [inline] BUG: KASAN: slab-use-after-free in __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752 Read of size 8 at addr ffff8880229254b0 by task syz-executor357/5216  CPU: 0 UID: 0 PID: 5216 Comm: syz-executor357 Not tainted 6.11.0-rc3-syzkaller-00156-gd7a5aa4b3c00 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace:  <TASK>  __dump_stack lib/dump_stack.c:93 [inline]  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119  print_address_description mm/kasan/report.c:377 [inline]  print_report+0x169/0x550 mm/kasan/report.c:488  kasan_report+0x143/0x180 mm/kasan/report.c:601  __mutex_lock_common kernel/locking/mutex.c:587 [inline]  __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752  dbFreeBits+0x7ea/0xd90 fs/jfs/jfs_dmap.c:2390  dbFreeDmap fs/jfs/jfs_dmap.c:2089 [inline]  dbFree+0x35b/0x680 fs/jfs/jfs_dmap.c:409  dbDiscardAG+0x8a9/0xa20 fs/jfs/jfs_dmap.c:1650  jfs_ioc_trim+0x433/0x670 fs/jfs/jfs_discard.c:100  jfs_ioctl+0x2d0/0x3e0 fs/jfs/ioctl.c:131  vfs_ioctl fs/ioctl.c:51 [inline]  __do_sys_ioctl fs/ioctl.c:907 [inline]  __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893  do_syscall_x64 arch/x86/entry/common.c:52 [inline]  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83  Freed by task 5218:  kasan_save_stack mm/kasan/common.c:47 [inline]  kasan_save_track+0x3f/0x80 mm/kasan/common.c:68  kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579  poison_slab_object+0xe0/0x150 mm/kasan/common.c:240  __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256  kasan_slab_free include/linux/kasan.h:184 [inline]  slab_free_hook mm/slub.c:2252 [inline]  slab_free mm/slub.c:4473 [inline]  kfree+0x149/0x360 mm/slub.c:4594  dbUnmount+0x11d/0x190 fs/jfs/jfs_dmap.c:278  jfs_mount_rw+0x4ac/0x6a0 fs/jfs/jfs_mount.c:247  jfs_remount+0x3d1/0x6b0 fs/jfs/super.c:454  reconfigure_super+0x445/0x880 fs/super.c:1083  vfs_cmd_reconfigure fs/fsopen.c:263 [inline]  vfs_fsconfig_locked fs/fsopen.c:292 [inline]  __do_sys_fsconfig fs/fsopen.c:473 [inline]  __se_sys_fsconfig+0xb6e/0xf80 fs/fsopen.c:345  do_syscall_x64 arch/x86/entry/common.c:52 [inline]  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83  entry_SYSCALL_64_after_hwframe+0x77/0x7f  [Analysis] There are two paths (dbUnmount and jfs_ioc_trim) that generate race condition when accessing bmap, which leads to the occurrence of uaf.  Use the lock s_umount to synchronize them, in order to avoid uaf caused by race condition.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | bpftool ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | dtb-aarch64 opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-64kb opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-64kb sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-azure opensuse-leap 15.6 | 6.4.0-150600.8.17.2 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-azure sles 15.6 | 6.4.0-150600.8.17.2 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-coco sles 15.6 | 6.4.0-15061.9.coco15sp6.1 | [SUSE-SU-2024:4387-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4387-1.md) | Dec 19, 2024 |
| Linux | kernel-coco_debug sles 15.6 | 6.4.0-15061.9.coco15sp6.1 | [SUSE-SU-2024:4387-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4387-1.md) | Dec 19, 2024 |
| Linux | kernel-debug opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-default opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-default-base opensuse-leap 15.6 | 6.4.0-150600.23.30.1.150600.12.12.6 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.30.1.150600.12.12.6 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-docs opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-kvmsmall opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-livepatch-SLE15-SP6-RT_Update_5 sles 15.6 | 1-150600.1.3.1 | [SUSE-SU-2024:3986-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3986-1.md) | Nov 13, 2024 |
| Linux | kernel-livepatch-SLE15-SP6_Update_6 sles 15.6 | 1-150600.13.3.5 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-obs-build opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-obs-qa opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-rt opensuse-leap 15.6 | 6.4.0-150600.10.17.1 | [SUSE-SU-2024:3986-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3986-1.md) | Nov 13, 2024 |
| Linux | kernel-rt_debug opensuse-leap 15.6 | 6.4.0-150600.10.17.1 | [SUSE-SU-2024:3986-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3986-1.md) | Nov 13, 2024 |
| Linux | kernel-source opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-source-azure opensuse-leap 15.6 | 6.4.0-150600.8.17.1 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-source-azure sles 15.6 | 6.4.0-150600.8.17.1 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-source-coco sles 15.6 | 6.4.0-15061.9.coco15sp6.1 | [SUSE-SU-2024:4387-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4387-1.md) | Dec 19, 2024 |
| Linux | kernel-source-rt opensuse-leap 15.6 | 6.4.0-150600.10.17.1 | [SUSE-SU-2024:3986-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3986-1.md) | Nov 13, 2024 |
| Linux | kernel-syms opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-syms-azure opensuse-leap 15.6 | 6.4.0-150600.8.17.1 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-syms-azure sles 15.6 | 6.4.0-150600.8.17.1 | [SUSE-SU-2024:3984-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3984-1.md) | Nov 13, 2024 |
| Linux | kernel-syms-coco sles 15.6 | 6.4.0-15061.9.coco15sp6.1 | [SUSE-SU-2024:4387-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4387-1.md) | Dec 19, 2024 |
| Linux | kernel-syms-rt opensuse-leap 15.6 | 6.4.0-150600.10.17.1 | [SUSE-SU-2024:3986-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3986-1.md) | Nov 13, 2024 |
| Linux | kernel-uek ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek ol 8 | 0:5.4.17-2136.338.4.1.el8uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |
| Linux | kernel-uek ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-container ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-container ol 8 | 0:5.4.17-2136.338.4.1.el8uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |
| Linux | kernel-uek-container ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-container-debug ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-container-debug ol 8 | 0:5.4.17-2136.338.4.1.el8uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |
| Linux | kernel-uek-container-debug ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-core ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-core ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-debug ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-debug ol 8 | 0:5.4.17-2136.338.4.1.el8uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |
| Linux | kernel-uek-debug ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-debug-core ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-debug-core ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-debug-devel ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-debug-devel ol 8 | 0:5.4.17-2136.338.4.1.el8uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |
| Linux | kernel-uek-debug-devel ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-debug-modules ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-debug-modules ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-debug-modules-extra ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-debug-modules-extra ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-devel ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-devel ol 8 | 0:5.4.17-2136.338.4.1.el8uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |
| Linux | kernel-uek-devel ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-doc ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-doc ol 8 | 0:5.4.17-2136.338.4.1.el8uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |
| Linux | kernel-uek-doc ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-modules ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-modules ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-modules-extra ol 8 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-modules-extra ol 9 | 0:5.15.0-303.171.5.2.el9uek | [ELSA-2024-12887](https://patchblox.com/security/data/fix/linux/elsa-2024-12887.md) | Dec 18, 2024 |
| Linux | kernel-uek-tools ol 8 | 0:5.4.17-2136.338.4.1.el7uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |
| Linux | kernel-uek-tools-libs ol 8 | 0:5.4.17-2136.338.4.1.el7uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |
| Linux | kernel-zfcpdump opensuse-leap 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | kernel-zfcpdump sles 15.6 | 6.4.0-150600.23.30.1 | [SUSE-SU-2024:4318-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-4318-1.md) | Dec 13, 2024 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.115-1 | [DEBIAN-CVE-2024-49903](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49903.md) | Oct 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.11.4-1 | [DEBIAN-CVE-2024-49903](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49903.md) | Oct 21, 2024 |
| Linux | linux Debian 14 | 6.11.4-1 | [DEBIAN-CVE-2024-49903](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49903.md) | Oct 21, 2024 |
| Linux | perf ol 8 | 0:5.4.17-2136.338.4.1.el7uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |
| Linux | python-perf ol 8 | 0:5.4.17-2136.338.4.1.el7uek | [ELSA-2024-12884](https://patchblox.com/security/data/fix/linux/elsa-2024-12884.md) | Dec 16, 2024 |

---

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