{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-26944 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-26944 is a high-severity use after free vulnerability in Linux kernel, published on 1 May 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-2024-26944 and fix it if it is affected.\n\nWhat it is: CVE-2024-26944 is a high-severity use after free vulnerability in Linux kernel, published on 1 May 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-2024-26944 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-2024-26944/ (Markdown: https://insights.sbomify.com/CVE-2024-26944/index.md)","id":"CVE-2024-26944","markdown":"https://insights.sbomify.com/CVE-2024-26944/index.md","name":"CVE-2024-26944","record":{"aliases":["AZL-55497","BELL-CVE-2024-26944","DEBIAN-CVE-2024-26944","GHSA-phc9-mf56-r5f6","ROOT-OS-DEBIAN-12-CVE-2024-26944","UBUNTU-CVE-2024-26944"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel's btrfs zoned mode allows attackers to cause a denial of service or potentially execute code.","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":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/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\nbtrfs: zoned: fix use-after-free in do_zone_finish()\n\nShinichiro reported the following use-after-free triggered by the device\nreplace operation in fstests btrfs/070.\n\n BTRFS info (device nullb1): scrub: finished on devid 1 with status: 0\n ==================================================================\n BUG: KASAN: slab-use-after-free in do_zone_finish+0x91a/0xb90 [btrfs]\n Read of size 8 at addr ffff8881543c8060 by task btrfs-cleaner/3494007\n\n CPU: 0 PID: 3494007 Comm: btrfs-cleaner Tainted: G        W          6.8.0-rc5-kts #1\n Hardware name: Supermicro Super Server/X11SPi-TF, BIOS 3.3 02/21/2020\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x5b/0x90\n  print_report+0xcf/0x670\n  ? __virt_addr_valid+0x200/0x3e0\n  kasan_report+0xd8/0x110\n  ? do_zone_finish+0x91a/0xb90 [btrfs]\n  ? do_zone_finish+0x91a/0xb90 [btrfs]\n  do_zone_finish+0x91a/0xb90 [btrfs]\n  btrfs_delete_unused_bgs+0x5e1/0x1750 [btrfs]\n  ? __pfx_btrfs_delete_unused_bgs+0x10/0x10 [btrfs]\n  ? btrfs_put_root+0x2d/0x220 [btrfs]\n  ? btrfs_clean_one_deleted_snapshot+0x299/0x430 [btrfs]\n  cleaner_kthread+0x21e/0x380 [btrfs]\n  ? __pfx_cleaner_kthread+0x10/0x10 [btrfs]\n  kthread+0x2e3/0x3c0\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork+0x31/0x70\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork_asm+0x1b/0x30\n  \u003c/TASK\u003e\n\n Allocated by task 3493983:\n  kasan_save_stack+0x33/0x60\n  kasan_save_track+0x14/0x30\n  __kasan_kmalloc+0xaa/0xb0\n  btrfs_alloc_device+0xb3/0x4e0 [btrfs]\n  device_list_add.constprop.0+0x993/0x1630 [btrfs]\n  btrfs_scan_one_device+0x219/0x3d0 [btrfs]\n  btrfs_control_ioctl+0x26e/0x310 [btrfs]\n  __x64_sys_ioctl+0x134/0x1b0\n  do_syscall_64+0x99/0x190\n  entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\n Freed by task 3494056:\n  kasan_save_stack+0x33/0x60\n  kasan_save_track+0x14/0x30\n  kasan_save_free_info+0x3f/0x60\n  poison_slab_object+0x102/0x170\n  __kasan_slab_free+0x32/0x70\n  kfree+0x11b/0x320\n  btrfs_rm_dev_replace_free_srcdev+0xca/0x280 [btrfs]\n  btrfs_dev_replace_finishing+0xd7e/0x14f0 [btrfs]\n  btrfs_dev_replace_by_ioctl+0x1286/0x25a0 [btrfs]\n  btrfs_ioctl+0xb27/0x57d0 [btrfs]\n  __x64_sys_ioctl+0x134/0x1b0\n  do_syscall_64+0x99/0x190\n  entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\n The buggy address belongs to the object at ffff8881543c8000\n  which belongs to the cache kmalloc-1k of size 1024\n The buggy address is located 96 bytes inside of\n  freed 1024-byte region [ffff8881543c8000, ffff8881543c8400)\n\n The buggy address belongs to the physical page:\n page:00000000fe2c1285 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1543c8\n head:00000000fe2c1285 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0\n flags: 0x17ffffc0000840(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\n page_type: 0xffffffff()\n raw: 0017ffffc0000840 ffff888100042dc0 ffffea0019e8f200 dead000000000002\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n  ffff8881543c7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n  ffff8881543c7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n \u003effff8881543c8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n                                                        ^\n  ffff8881543c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n  ffff8881543c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\nThis UAF happens because we're accessing stale zone information of a\nalready removed btrfs_device in do_zone_finish().\n\nThe sequence of events is as follows:\n\nbtrfs_dev_replace_start\n  btrfs_scrub_dev\n   btrfs_dev_replace_finishing\n    btrfs_dev_replace_update_device_in_mapping_tree \u003c-- devices replaced\n    btrfs_rm_dev_replace_free_srcdev\n     btrfs_free_device                              \u003c-- device freed\n\ncleaner_kthread\n btrfs_delete_unused_bgs\n  btrfs_zone_finish\n   do_zone_finish              \u003c-- refers the freed device\n\nThe reason for this is that we're using a\n---truncated---","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":"btrfs: zoned: fix use-after-free in do_zone_finish()","id":"CVE-2024-26944","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":2,"next":{"headline":"crypto: iaa - Fix nr_cpus \u003c nr_iaa case","id":"CVE-2024-26945"},"packages":[],"prev":{"headline":"nouveau/dmem: handle kcalloc() allocation failure","id":"CVE-2024-26943"},"products":["Linux"],"published":"2024-05-01","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":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel's btrfs zoned mode allows attackers to cause a denial of service or potentially execute code.","url":"https://insights.sbomify.com/CVE-2024-26944/"}