{"uuid": "1bdef6b3-652e-46eb-8aa7-8bc0006e073b", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2024-56755", "type": "seen", "source": "https://t.me/cvedetector/13874", "content": "{\n  \"Source\": \"CVE FEED\",\n  \"Title\": \"CVE-2024-56755 - Apache Linux Kernel Double-Submission Race Condition\", \n  \"Content\": \"CVE ID : CVE-2024-56755 \nPublished : Dec. 29, 2024, 12:15 p.m. | 44\u00a0minutes ago \nDescription : In the Linux kernel, the following vulnerability has been resolved:  \n  \nnetfs/fscache: Add a memory barrier for FSCACHE_VOLUME_CREATING  \n  \nIn fscache_create_volume(), there is a missing memory barrier between the  \nbit-clearing operation and the wake-up operation. This may cause a  \nsituation where, after a wake-up, the bit-clearing operation hasn't been  \ndetected yet, leading to an indefinite wait. The triggering process is as  \nfollows:  \n  \n  [cookie1]                [cookie2]                  [volume_work]  \nfscache_perform_lookup  \n  fscache_create_volume  \n                        fscache_perform_lookup  \n                          fscache_create_volume  \n                           fscache_create_volume_work  \n                                                  cachefiles_acquire_volume  \n                                                  clear_and_wake_up_bit  \n    test_and_set_bit  \n                            test_and_set_bit  \n                              goto maybe_wait  \n      goto no_wait  \n  \nIn the above process, cookie1 and cookie2 has the same volume. When cookie1  \nenters the -no_wait- process, it will clear the bit and wake up the waiting  \nprocess. If a barrier is missing, it may cause cookie2 to remain in the  \n-wait- process indefinitely.  \n  \nIn commit 3288666c7256 (\"fscache: Use clear_and_wake_up_bit() in  \nfscache_create_volume_work()\"), barriers were added to similar operations  \nin fscache_create_volume_work(), but fscache_create_volume() was missed.  \n  \nBy combining the clear and wake operations into clear_and_wake_up_bit() to  \nfix this issue. \nSeverity: 0.0 | NA \nVisit the link for more details, such as CVSS details, affected products, timeline, and more...\",\n  \"Detection Date\": \"29 Dec 2024\",\n  \"Type\": \"Vulnerability\"\n}\n\ud83d\udd39 t.me/cvedetector \ud83d\udd39", "creation_timestamp": "2024-12-29T14:02:02.000000Z"}