{"id":"DEBIAN-CVE-2022-49021","details":"In the Linux kernel, the following vulnerability has been resolved:  net: phy: fix null-ptr-deref while probe() failed  I got a null-ptr-deref report as following when doing fault injection test:  BUG: kernel NULL pointer dereference, address: 0000000000000058 Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 PID: 253 Comm: 507-spi-dm9051 Tainted: G    B            N 6.1.0-rc3+ Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:klist_put+0x2d/0xd0 Call Trace:  \u003cTASK\u003e  klist_remove+0xf1/0x1c0  device_release_driver_internal+0x23e/0x2d0  bus_remove_device+0x1bd/0x240  device_del+0x357/0x770  phy_device_remove+0x11/0x30  mdiobus_unregister+0xa5/0x140  release_nodes+0x6a/0xa0  devres_release_all+0xf8/0x150  device_unbind_cleanup+0x19/0xd0  //probe path: phy_device_register()   device_add()  phy_connect   phy_attach_direct() //set device driver     probe() //it's failed, driver is not bound     device_bind_driver() // probe failed, it's not called  //remove path: phy_device_remove()   device_del()     device_release_driver_internal()       __device_release_driver() //dev-\u003edrv is not NULL         klist_remove() \u003c- knode_driver is not added yet, cause null-ptr-deref  In phy_attach_direct(), after setting the 'dev-\u003edriver', probe() fails, device_bind_driver() is not called, so the knode_driver-\u003en_klist is not set, then it causes null-ptr-deref in __device_release_driver() while deleting device. Fix this by setting dev-\u003edriver to NULL in the error path in phy_attach_direct().","modified":"2026-09-01T16:05:29.615539884Z","published":"2024-10-21T20:15:13.163Z","upstream":["CVE-2022-49021"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-49021"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49021.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49021.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49021.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"}]}