{"id":"DEBIAN-CVE-2025-22002","details":"In the Linux kernel, the following vulnerability has been resolved:  netfs: Call `invalidate_cache` only if implemented  Many filesystems such as NFS and Ceph do not implement the `invalidate_cache` method.  On those filesystems, if writing to the cache (`NETFS_WRITE_TO_CACHE`) fails for some reason, the kernel crashes like this:   BUG: kernel NULL pointer dereference, address: 0000000000000000  #PF: supervisor instruction fetch in kernel mode  #PF: error_code(0x0010) - not-present page  PGD 0 P4D 0  Oops: Oops: 0010 [#1] SMP PTI  CPU: 9 UID: 0 PID: 3380 Comm: kworker/u193:11 Not tainted 6.13.3-cm4all1-hp #437  Hardware name: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 10/17/2018  Workqueue: events_unbound netfs_write_collection_worker  RIP: 0010:0x0  Code: Unable to access opcode bytes at 0xffffffffffffffd6.  RSP: 0018:ffff9b86e2ca7dc0 EFLAGS: 00010202  RAX: 0000000000000000 RBX: 0000000000000000 RCX: 7fffffffffffffff  RDX: 0000000000000001 RSI: ffff89259d576a18 RDI: ffff89259d576900  RBP: ffff89259d5769b0 R08: ffff9b86e2ca7d28 R09: 0000000000000002  R10: ffff89258ceaca80 R11: 0000000000000001 R12: 0000000000000020  R13: ffff893d158b9338 R14: ffff89259d576900 R15: ffff89259d5769b0  FS:  0000000000000000(0000) GS:ffff893c9fa40000(0000) knlGS:0000000000000000  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033  CR2: ffffffffffffffd6 CR3: 000000054442e003 CR4: 00000000001706f0  Call Trace:   \u003cTASK\u003e   ? __die+0x1f/0x60   ? page_fault_oops+0x15c/0x460   ? try_to_wake_up+0x2d2/0x530   ? exc_page_fault+0x5e/0x100   ? asm_exc_page_fault+0x22/0x30   netfs_write_collection_worker+0xe9f/0x12b0   ? xs_poll_check_readable+0x3f/0x80   ? xs_stream_data_receive_workfn+0x8d/0x110   process_one_work+0x134/0x2d0   worker_thread+0x299/0x3a0   ? __pfx_worker_thread+0x10/0x10   kthread+0xba/0xe0   ? __pfx_kthread+0x10/0x10   ret_from_fork+0x30/0x50   ? __pfx_kthread+0x10/0x10   ret_from_fork_asm+0x1a/0x30   \u003c/TASK\u003e  Modules linked in:  CR2: 0000000000000000  This patch adds the missing `NULL` check.","modified":"2026-08-27T23:05:20.290023758Z","published":"2025-04-03T08:15:15.723Z","upstream":["CVE-2025-22002"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-22002"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.21-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-22002.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.21-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-22002.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}