{"id":"CVE-2025-39947","state":"PUBLISHED","title":"net/mlx5e: Harden uplink netdev access against device unbind","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Harden uplink netdev access against device unbind\n\nThe function mlx5_uplink_netdev_get() gets the uplink netdevice\npointer from mdev->mlx5e_res.uplink_netdev. However, the netdevice can\nbe removed and its pointer cleared when unbound from the mlx5_core.eth\ndriver. This results in a NULL pointer, causing a kernel panic.\n\n BUG: unable to handle page fault for address: 0000000000001300\n at RIP: 0010:mlx5e_vport_rep_load+0x22a/0x270 [mlx5_core]\n Call Trace:\n  <TASK>\n  mlx5_esw_offloads_rep_load+0x68/0xe0 [mlx5_core]\n  esw_offloads_enable+0x593/0x910 [mlx5_core]\n  mlx5_eswitch_enable_locked+0x341/0x420 [mlx5_core]\n  mlx5_devlink_eswitch_mode_set+0x17e/0x3a0 [mlx5_core]\n  devlink_nl_eswitch_set_doit+0x60/0xd0\n  genl_family_rcv_msg_doit+0xe0/0x130\n  genl_rcv_msg+0x183/0x290\n  netlink_rcv_skb+0x4b/0xf0\n  genl_rcv+0x24/0x40\n  netlink_unicast+0x255/0x380\n  netlink_sendmsg+0x1f3/0x420\n  __sock_sendmsg+0x38/0x60\n  __sys_sendto+0x119/0x180\n  do_syscall_64+0x53/0x1d0\n  entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nEnsure the pointer is valid before use by checking it for NULL. If it\nis valid, immediately call netdev_hold() to take a reference, and\npreventing the netdevice from being freed while it is in use.","publishedAt":"2025-10-04T07:31:08.636Z","updatedAt":"2026-05-11T21:39:30.137Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7a9fb35e8c3a67145fca262c304de65cb2f83abf","status":"affected","lessThan":"2cb17c88edd3a1c7aa6bc880dcdb35a6866fcb2e","versionType":"git"},{"version":"7a9fb35e8c3a67145fca262c304de65cb2f83abf","status":"affected","lessThan":"d1f3db4e7a3be29fc17f01850f162363f919370d","versionType":"git"},{"version":"7a9fb35e8c3a67145fca262c304de65cb2f83abf","status":"affected","lessThan":"8df354eb2dd63d111ed5ae2e956e0dbb22bcf93b","versionType":"git"},{"version":"7a9fb35e8c3a67145fca262c304de65cb2f83abf","status":"affected","lessThan":"6b4be64fd9fec16418f365c2d8e47a7566e9eba5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en_rep.c","drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c","drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h","include/linux/mlx5/driver.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"6.6.108","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.49","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.16.9","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en_rep.c","drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c","drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h","include/linux/mlx5/driver.h"]}],"references":["https://git.kernel.org/stable/c/2cb17c88edd3a1c7aa6bc880dcdb35a6866fcb2e","https://git.kernel.org/stable/c/d1f3db4e7a3be29fc17f01850f162363f919370d","https://git.kernel.org/stable/c/8df354eb2dd63d111ed5ae2e956e0dbb22bcf93b","https://git.kernel.org/stable/c/6b4be64fd9fec16418f365c2d8e47a7566e9eba5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/39xxx/CVE-2025-39947.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-39947","state":"PUBLISHED","datePublished":"2025-10-04T07:31:08.636Z","dateUpdated":"2026-05-11T21:39:30.137Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.148Z"},"containers":{"cna":{"title":"net/mlx5e: Harden uplink netdev access against device unbind","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Harden uplink netdev access against device unbind\n\nThe function mlx5_uplink_netdev_get() gets the uplink netdevice\npointer from mdev->mlx5e_res.uplink_netdev. However, the netdevice can\nbe removed and its pointer cleared when unbound from the mlx5_core.eth\ndriver. This results in a NULL pointer, causing a kernel panic.\n\n BUG: unable to handle page fault for address: 0000000000001300\n at RIP: 0010:mlx5e_vport_rep_load+0x22a/0x270 [mlx5_core]\n Call Trace:\n  <TASK>\n  mlx5_esw_offloads_rep_load+0x68/0xe0 [mlx5_core]\n  esw_offloads_enable+0x593/0x910 [mlx5_core]\n  mlx5_eswitch_enable_locked+0x341/0x420 [mlx5_core]\n  mlx5_devlink_eswitch_mode_set+0x17e/0x3a0 [mlx5_core]\n  devlink_nl_eswitch_set_doit+0x60/0xd0\n  genl_family_rcv_msg_doit+0xe0/0x130\n  genl_rcv_msg+0x183/0x290\n  netlink_rcv_skb+0x4b/0xf0\n  genl_rcv+0x24/0x40\n  netlink_unicast+0x255/0x380\n  netlink_sendmsg+0x1f3/0x420\n  __sock_sendmsg+0x38/0x60\n  __sys_sendto+0x119/0x180\n  do_syscall_64+0x53/0x1d0\n  entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nEnsure the pointer is valid before use by checking it for NULL. If it\nis valid, immediately call netdev_hold() to take a reference, and\npreventing the netdevice from being freed while it is in use."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7a9fb35e8c3a67145fca262c304de65cb2f83abf","status":"affected","lessThan":"2cb17c88edd3a1c7aa6bc880dcdb35a6866fcb2e","versionType":"git"},{"version":"7a9fb35e8c3a67145fca262c304de65cb2f83abf","status":"affected","lessThan":"d1f3db4e7a3be29fc17f01850f162363f919370d","versionType":"git"},{"version":"7a9fb35e8c3a67145fca262c304de65cb2f83abf","status":"affected","lessThan":"8df354eb2dd63d111ed5ae2e956e0dbb22bcf93b","versionType":"git"},{"version":"7a9fb35e8c3a67145fca262c304de65cb2f83abf","status":"affected","lessThan":"6b4be64fd9fec16418f365c2d8e47a7566e9eba5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en_rep.c","drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c","drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h","include/linux/mlx5/driver.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"6.6.108","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.49","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.16.9","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en_rep.c","drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c","drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h","include/linux/mlx5/driver.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/2cb17c88edd3a1c7aa6bc880dcdb35a6866fcb2e"},{"url":"https://git.kernel.org/stable/c/d1f3db4e7a3be29fc17f01850f162363f919370d"},{"url":"https://git.kernel.org/stable/c/8df354eb2dd63d111ed5ae2e956e0dbb22bcf93b"},{"url":"https://git.kernel.org/stable/c/6b4be64fd9fec16418f365c2d8e47a7566e9eba5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:39:30.137Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.108"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.49"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.16.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}