{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-49903 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-49903 is a high-severity use after free vulnerability in Linux kernel, published on 21 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2024-49903 and fix it if it is affected.\n\nWhat it is: CVE-2024-49903 is a high-severity use after free vulnerability in Linux kernel, published on 21 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2024-49903 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2024-49903/ (Markdown: https://insights.sbomify.com/CVE-2024-49903/index.md)","id":"CVE-2024-49903","markdown":"https://insights.sbomify.com/CVE-2024-49903/index.md","name":"CVE-2024-49903","record":{"aliases":["AZL-51330","BELL-CVE-2024-49903","DEBIAN-CVE-2024-49903","GHSA-rgx3-g7m3-gj3j","UBUNTU-CVE-2024-49903"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel JFS","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel's JFS filesystem allows local attackers to execute arbitrary code or escalate privileges.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\njfs: Fix uaf in dbFreeBits\n\n[syzbot reported]\n==================================================================\nBUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/mutex.c:587 [inline]\nBUG: KASAN: slab-use-after-free in __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752\nRead of size 8 at addr ffff8880229254b0 by task syz-executor357/5216\n\nCPU: 0 UID: 0 PID: 5216 Comm: syz-executor357 Not tainted 6.11.0-rc3-syzkaller-00156-gd7a5aa4b3c00 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:93 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n __mutex_lock_common kernel/locking/mutex.c:587 [inline]\n __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752\n dbFreeBits+0x7ea/0xd90 fs/jfs/jfs_dmap.c:2390\n dbFreeDmap fs/jfs/jfs_dmap.c:2089 [inline]\n dbFree+0x35b/0x680 fs/jfs/jfs_dmap.c:409\n dbDiscardAG+0x8a9/0xa20 fs/jfs/jfs_dmap.c:1650\n jfs_ioc_trim+0x433/0x670 fs/jfs/jfs_discard.c:100\n jfs_ioctl+0x2d0/0x3e0 fs/jfs/ioctl.c:131\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:907 [inline]\n __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n\nFreed by task 5218:\n kasan_save_stack mm/kasan/common.c:47 [inline]\n kasan_save_track+0x3f/0x80 mm/kasan/common.c:68\n kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579\n poison_slab_object+0xe0/0x150 mm/kasan/common.c:240\n __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256\n kasan_slab_free include/linux/kasan.h:184 [inline]\n slab_free_hook mm/slub.c:2252 [inline]\n slab_free mm/slub.c:4473 [inline]\n kfree+0x149/0x360 mm/slub.c:4594\n dbUnmount+0x11d/0x190 fs/jfs/jfs_dmap.c:278\n jfs_mount_rw+0x4ac/0x6a0 fs/jfs/jfs_mount.c:247\n jfs_remount+0x3d1/0x6b0 fs/jfs/super.c:454\n reconfigure_super+0x445/0x880 fs/super.c:1083\n vfs_cmd_reconfigure fs/fsopen.c:263 [inline]\n vfs_fsconfig_locked fs/fsopen.c:292 [inline]\n __do_sys_fsconfig fs/fsopen.c:473 [inline]\n __se_sys_fsconfig+0xb6e/0xf80 fs/fsopen.c:345\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n[Analysis]\nThere are two paths (dbUnmount and jfs_ioc_trim) that generate race\ncondition when accessing bmap, which leads to the occurrence of uaf.\n\nUse the lock s_umount to synchronize them, in order to avoid uaf caused\nby race condition.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"jfs: Fix uaf in dbFreeBits","id":"CVE-2024-49903","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2024"},"n_packages":0,"n_references":9,"next":{"headline":"drm/amdgpu: add list empty check to avoid null pointer issue","id":"CVE-2024-49904"},"packages":[],"prev":{"headline":"jfs: check if leafidx greater than num leaves per dmap tree","id":"CVE-2024-49902"},"products":["Linux"],"published":"2024-10-21","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel's JFS filesystem allows local attackers to execute arbitrary code or escalate privileges.","url":"https://insights.sbomify.com/CVE-2024-49903/"}