{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"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+0x2e1/0x370Read of size 4 at addr ffff88810680be08 by task ondemand-04-dae/5798CPU: 0 PID: 5798 Comm: ondemand-04-dae Not tainted 6.8.0-dirty #565Call 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+0x139/0x230Allocated 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 itsreference count may be 0. So use the new fscache_try_get_volume() helperfunction try to get its reference count.If the reference count of fscache_volume is 0, fscache_put_volume() isfreeing it, so wait for it to be removed from cache->volumes.If its reference count is not 0, call cachefiles_withdraw_volume() withreference count protection to avoid the above issue.", "category":"general", "title":"Synopsis" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2024-41058" }, { "summary":"CVE-2024-41058 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2024/csaf-openeuler-cve-2024-41058.json" }, { "summary":"openEuler-SA-2024-2076", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-2076" }, { "summary":"CVE-2024-41058", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2024-41058&packageName=kernel" } ], "title":"openEuler cve CVE-2024-41058", "tracking":{ "initial_release_date":"2024-08-30T20:25:35+08:00", "revision_history":[ { "date":"2024-08-30T20:25:35+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2024-08-30T20:25:35+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2024-08-30T20:25:35+08:00", "id":"CVE-2024-41058", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS" }, "product_id":"openEuler-24.03-LTS", "name":"openEuler-24.03-LTS" }, "name":"openEuler-24.03-LTS", 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issue in our fault injection stress test:==================================================================BUG: KASAN: slab-use-after-free in fscache_withdraw_volume+0x2e1/0x370Read of size 4 at addr ffff88810680be08 by task ondemand-04-dae/5798CPU: 0 PID: 5798 Comm: ondemand-04-dae Not tainted 6.8.0-dirty #565Call 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+0x139/0x230Allocated 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 itsreference count may be 0. So use the new fscache_try_get_volume() helperfunction try to get its reference count.If the reference count of fscache_volume is 0, fscache_put_volume() isfreeing it, so wait for it to be removed from cache->volumes.If its reference count is not 0, call cachefiles_withdraw_volume() withreference count protection to avoid the above issue.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS:bpftool-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:bpftool-debuginfo-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debuginfo-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debugsource-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-devel-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-headers-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-source-6.6.0-39.0.0.47.oe2403.aarch64", 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"cvss_v3":{ "baseSeverity":"HIGH", "baseScore":7.8, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version":"3.1" }, "products":[ "openEuler-24.03-LTS:bpftool-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:bpftool-debuginfo-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debuginfo-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debugsource-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-devel-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-headers-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-source-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-tools-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-tools-debuginfo-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:kernel-tools-devel-6.6.0-39.0.0.47.oe2403.aarch64", "openEuler-24.03-LTS:perf-6.6.0-39.0.0.47.oe2403.aarch64", 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"openEuler-24.03-LTS:perf-6.6.0-39.0.0.47.oe2403.x86_64", "openEuler-24.03-LTS:perf-debuginfo-6.6.0-39.0.0.47.oe2403.x86_64", "openEuler-24.03-LTS:python3-perf-6.6.0-39.0.0.47.oe2403.x86_64", "openEuler-24.03-LTS:python3-perf-debuginfo-6.6.0-39.0.0.47.oe2403.x86_64", "openEuler-24.03-LTS:kernel-6.6.0-39.0.0.47.oe2403.src" ] } ], "threats":[ { "details":"High", "category":"impact" } ], "title":"CVE-2024-41058" } ] }