CVE-2024-41058 (GCVE-0-2024-41058)

Vulnerability from cvelistv5 – Published: 2024-07-29 14:57 – Updated: 2025-11-03 21:59
VLAI?
Title
cachefiles: fix slab-use-after-free in fscache_withdraw_volume()
Summary
In the Linux kernel, the following vulnerability has been resolved: cachefiles: fix slab-use-after-free in fscache_withdraw_volume() We got the following issue in our fault injection stress test: ================================================================== BUG: KASAN: slab-use-after-free in fscache_withdraw_volume+0x2e1/0x370 Read of size 4 at addr ffff88810680be08 by task ondemand-04-dae/5798 CPU: 0 PID: 5798 Comm: ondemand-04-dae Not tainted 6.8.0-dirty #565 Call Trace: kasan_check_range+0xf6/0x1b0 fscache_withdraw_volume+0x2e1/0x370 cachefiles_withdraw_volume+0x31/0x50 cachefiles_withdraw_cache+0x3ad/0x900 cachefiles_put_unbind_pincount+0x1f6/0x250 cachefiles_daemon_release+0x13b/0x290 __fput+0x204/0xa00 task_work_run+0x139/0x230 Allocated by task 5820: __kmalloc+0x1df/0x4b0 fscache_alloc_volume+0x70/0x600 __fscache_acquire_volume+0x1c/0x610 erofs_fscache_register_volume+0x96/0x1a0 erofs_fscache_register_fs+0x49a/0x690 erofs_fc_fill_super+0x6c0/0xcc0 vfs_get_super+0xa9/0x140 vfs_get_tree+0x8e/0x300 do_new_mount+0x28c/0x580 [...] Freed by task 5820: kfree+0xf1/0x2c0 fscache_put_volume.part.0+0x5cb/0x9e0 erofs_fscache_unregister_fs+0x157/0x1b0 erofs_kill_sb+0xd9/0x1c0 deactivate_locked_super+0xa3/0x100 vfs_get_super+0x105/0x140 vfs_get_tree+0x8e/0x300 do_new_mount+0x28c/0x580 [...] ================================================================== Following is the process that triggers the issue: mount failed | daemon exit ------------------------------------------------------------ deactivate_locked_super cachefiles_daemon_release erofs_kill_sb erofs_fscache_unregister_fs fscache_relinquish_volume __fscache_relinquish_volume fscache_put_volume(fscache_volume, fscache_volume_put_relinquish) zero = __refcount_dec_and_test(&fscache_volume->ref, &ref); cachefiles_put_unbind_pincount cachefiles_daemon_unbind cachefiles_withdraw_cache cachefiles_withdraw_volumes list_del_init(&volume->cache_link) fscache_free_volume(fscache_volume) cache->ops->free_volume cachefiles_free_volume list_del_init(&cachefiles_volume->cache_link); kfree(fscache_volume) cachefiles_withdraw_volume fscache_withdraw_volume fscache_volume->n_accesses // fscache_volume UAF !!! The fscache_volume in cache->volumes must not have been freed yet, but its reference count may be 0. So use the new fscache_try_get_volume() helper function try to get its reference count. If the reference count of fscache_volume is 0, fscache_put_volume() is freeing it, so wait for it to be removed from cache->volumes. If its reference count is not 0, call cachefiles_withdraw_volume() with reference count protection to avoid the above issue.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: fe2140e2f57fef8562e0f9b7cd447d2b08dc2f35 , < 90f17e47f1e209c6a3c92a1d038a0a80c95c460e (git)
Affected: fe2140e2f57fef8562e0f9b7cd447d2b08dc2f35 , < 9dd7f5663899ea13a6a73216106d9c13c37453e3 (git)
Affected: fe2140e2f57fef8562e0f9b7cd447d2b08dc2f35 , < 38b88d544216f806d93a273a62ff8ebe82254003 (git)
Affected: fe2140e2f57fef8562e0f9b7cd447d2b08dc2f35 , < 522018a0de6b6fcce60c04f86dfc5f0e4b6a1b36 (git)
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    Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.101 , ≤ 6.1.* (semver)
Unaffected: 6.6.42 , ≤ 6.6.* (semver)
Unaffected: 6.9.11 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: fix slab-use-after-free in fscache_withdraw_volume()\n\nWe got the following issue in our fault injection stress test:\n\n==================================================================\nBUG: KASAN: slab-use-after-free in fscache_withdraw_volume+0x2e1/0x370\nRead of size 4 at addr ffff88810680be08 by task ondemand-04-dae/5798\n\nCPU: 0 PID: 5798 Comm: ondemand-04-dae Not tainted 6.8.0-dirty #565\nCall Trace:\n kasan_check_range+0xf6/0x1b0\n fscache_withdraw_volume+0x2e1/0x370\n cachefiles_withdraw_volume+0x31/0x50\n cachefiles_withdraw_cache+0x3ad/0x900\n cachefiles_put_unbind_pincount+0x1f6/0x250\n cachefiles_daemon_release+0x13b/0x290\n __fput+0x204/0xa00\n task_work_run+0x139/0x230\n\nAllocated by task 5820:\n __kmalloc+0x1df/0x4b0\n fscache_alloc_volume+0x70/0x600\n __fscache_acquire_volume+0x1c/0x610\n erofs_fscache_register_volume+0x96/0x1a0\n erofs_fscache_register_fs+0x49a/0x690\n erofs_fc_fill_super+0x6c0/0xcc0\n vfs_get_super+0xa9/0x140\n vfs_get_tree+0x8e/0x300\n do_new_mount+0x28c/0x580\n [...]\n\nFreed by task 5820:\n kfree+0xf1/0x2c0\n fscache_put_volume.part.0+0x5cb/0x9e0\n erofs_fscache_unregister_fs+0x157/0x1b0\n erofs_kill_sb+0xd9/0x1c0\n deactivate_locked_super+0xa3/0x100\n vfs_get_super+0x105/0x140\n vfs_get_tree+0x8e/0x300\n do_new_mount+0x28c/0x580\n [...]\n==================================================================\n\nFollowing is the process that triggers the issue:\n\n        mount failed         |         daemon exit\n------------------------------------------------------------\n deactivate_locked_super        cachefiles_daemon_release\n  erofs_kill_sb\n   erofs_fscache_unregister_fs\n    fscache_relinquish_volume\n     __fscache_relinquish_volume\n      fscache_put_volume(fscache_volume, fscache_volume_put_relinquish)\n       zero = __refcount_dec_and_test(\u0026fscache_volume-\u003eref, \u0026ref);\n                                 cachefiles_put_unbind_pincount\n                                  cachefiles_daemon_unbind\n                                   cachefiles_withdraw_cache\n                                    cachefiles_withdraw_volumes\n                                     list_del_init(\u0026volume-\u003ecache_link)\n       fscache_free_volume(fscache_volume)\n        cache-\u003eops-\u003efree_volume\n         cachefiles_free_volume\n          list_del_init(\u0026cachefiles_volume-\u003ecache_link);\n        kfree(fscache_volume)\n                                     cachefiles_withdraw_volume\n                                      fscache_withdraw_volume\n                                       fscache_volume-\u003en_accesses\n                                       // fscache_volume UAF !!!\n\nThe fscache_volume in cache-\u003evolumes must not have been freed yet, but its\nreference count may be 0. So use the new fscache_try_get_volume() helper\nfunction try to get its reference count.\n\nIf the reference count of fscache_volume is 0, fscache_put_volume() is\nfreeing it, so wait for it to be removed from cache-\u003evolumes.\n\nIf its reference count is not 0, call cachefiles_withdraw_volume() with\nreference count protection to avoid the above issue."
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fscache_withdraw_volume+0x2e1/0x370\\nRead of size 4 at addr ffff88810680be08 by task ondemand-04-dae/5798\\n\\nCPU: 0 PID: 5798 Comm: ondemand-04-dae Not tainted 6.8.0-dirty #565\\nCall Trace:\\n kasan_check_range+0xf6/0x1b0\\n fscache_withdraw_volume+0x2e1/0x370\\n cachefiles_withdraw_volume+0x31/0x50\\n cachefiles_withdraw_cache+0x3ad/0x900\\n cachefiles_put_unbind_pincount+0x1f6/0x250\\n cachefiles_daemon_release+0x13b/0x290\\n __fput+0x204/0xa00\\n task_work_run+0x139/0x230\\n\\nAllocated by task 5820:\\n __kmalloc+0x1df/0x4b0\\n fscache_alloc_volume+0x70/0x600\\n __fscache_acquire_volume+0x1c/0x610\\n erofs_fscache_register_volume+0x96/0x1a0\\n erofs_fscache_register_fs+0x49a/0x690\\n erofs_fc_fill_super+0x6c0/0xcc0\\n vfs_get_super+0xa9/0x140\\n vfs_get_tree+0x8e/0x300\\n do_new_mount+0x28c/0x580\\n [...]\\n\\nFreed by task 5820:\\n kfree+0xf1/0x2c0\\n fscache_put_volume.part.0+0x5cb/0x9e0\\n erofs_fscache_unregister_fs+0x157/0x1b0\\n erofs_kill_sb+0xd9/0x1c0\\n deactivate_locked_super+0xa3/0x100\\n vfs_get_super+0x105/0x140\\n vfs_get_tree+0x8e/0x300\\n do_new_mount+0x28c/0x580\\n [...]\\n==================================================================\\n\\nFollowing is the process that triggers the issue:\\n\\n        mount failed         |         daemon exit\\n------------------------------------------------------------\\n deactivate_locked_super        cachefiles_daemon_release\\n  erofs_kill_sb\\n   erofs_fscache_unregister_fs\\n    fscache_relinquish_volume\\n     __fscache_relinquish_volume\\n      fscache_put_volume(fscache_volume, fscache_volume_put_relinquish)\\n       zero = __refcount_dec_and_test(\u0026fscache_volume-\u003eref, \u0026ref);\\n                                 cachefiles_put_unbind_pincount\\n                                  cachefiles_daemon_unbind\\n                                   cachefiles_withdraw_cache\\n                                    cachefiles_withdraw_volumes\\n                                     list_del_init(\u0026volume-\u003ecache_link)\\n       fscache_free_volume(fscache_volume)\\n        cache-\u003eops-\u003efree_volume\\n         cachefiles_free_volume\\n          list_del_init(\u0026cachefiles_volume-\u003ecache_link);\\n        kfree(fscache_volume)\\n                                     cachefiles_withdraw_volume\\n                                      fscache_withdraw_volume\\n                                       fscache_volume-\u003en_accesses\\n                                       // fscache_volume UAF !!!\\n\\nThe fscache_volume in cache-\u003evolumes must not have been freed yet, but its\\nreference count may be 0. So use the new fscache_try_get_volume() helper\\nfunction try to get its reference count.\\n\\nIf the reference count of fscache_volume is 0, fscache_put_volume() is\\nfreeing it, so wait for it to be removed from cache-\u003evolumes.\\n\\nIf its reference count is not 0, call cachefiles_withdraw_volume() with\\nreference count protection to avoid the above issue.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T09:11:05.806Z\"}}}",
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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.