{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89780","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.765Z","datePublished":"2026-09-16T08:48:19.760Z","dateUpdated":"2026-09-16T08:48:19.760Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-16T08:48:19.760Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: restore skb->dev on deaggregated frames\n\nrmnet_map_deaggregate() allocates each sub-frame with alloc_skb() and\nleaves skb->dev NULL. __rmnet_map_ingress_handler() assigns\nskb->dev = ep->egress_dev only on the data path, but a MAP command frame\nis dispatched to rmnet_map_command() before that, so rmnet_map_send_ack()\nruns netif_tx_lock(skb->dev) on a NULL device. An unprivileged user\nreaches this by unsharing a user+net namespace, creating an rmnet link\nover a tap device with INGRESS_DEAGGREGATION and INGRESS_MAP_COMMANDS,\nand writing an aggregated frame carrying a flow-control command to the\ntap fd.\n\nRestore the assignment dropped by 378e25357ac7, so every skb leaving\nrmnet_map_deaggregate() has a valid device.\n\n  BUG: KASAN: null-ptr-deref in _raw_spin_lock (kernel/locking/spinlock.c:158)\n  Write of size 4 at addr 00000000000004b4 by task exploit/144\n  Call Trace:\n   _raw_spin_lock (kernel/locking/spinlock.c:158)\n   netif_tx_lock (net/sched/sch_generic.c:497)\n   rmnet_map_command (drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c:67)\n   rmnet_rx_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:125)\n   __netif_receive_skb_core.constprop.0 (net/core/dev.c:6103)\n   ...\n   __netif_receive_skb_one_core (net/core/dev.c:6214)\n   netif_receive_skb (net/core/dev.c:6474)\n   tun_get_user (drivers/net/tun.c:1966)\n   tun_chr_write_iter (drivers/net/tun.c:2012)\n   vfs_write (fs/read_write.c:687)\n   ksys_write (fs/read_write.c:739)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n  Kernel panic - not syncing: Fatal exception in interrupt"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c"],"versions":[{"version":"378e25357ac78ad02fbc98bec9b4e3baaa916c5c","lessThan":"5aaa7409c1b4ca4c60d66e2afa99703bf4eb7ddd","status":"affected","versionType":"git"},{"version":"378e25357ac78ad02fbc98bec9b4e3baaa916c5c","lessThan":"9b78ab84ddf97c06a8567edb62b6c0fd582f9a62","status":"affected","versionType":"git"},{"version":"378e25357ac78ad02fbc98bec9b4e3baaa916c5c","lessThan":"9d18c6c6cd1666b2cb7915cad052e22abf520997","status":"affected","versionType":"git"},{"version":"378e25357ac78ad02fbc98bec9b4e3baaa916c5c","lessThan":"4bcef54e4a3355a62d9ad90729fe563435ec76c3","status":"affected","versionType":"git"},{"version":"378e25357ac78ad02fbc98bec9b4e3baaa916c5c","lessThan":"b14c22c31d9e30f38ea1693ac06d318f32258f5d","status":"affected","versionType":"git"},{"version":"378e25357ac78ad02fbc98bec9b4e3baaa916c5c","lessThan":"7abe769e72c792e5f9eb273813eb3ecd8389854c","status":"affected","versionType":"git"},{"version":"378e25357ac78ad02fbc98bec9b4e3baaa916c5c","lessThan":"200460a0793dc6af97d3b36d92ac245350ac26fc","status":"affected","versionType":"git"},{"version":"378e25357ac78ad02fbc98bec9b4e3baaa916c5c","lessThan":"a66734a1c5e36525ea07e9f4547fddc51e916de3","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c"],"versions":[{"version":"4.17","status":"affected"},{"version":"0","lessThan":"4.17","status":"unaffected","versionType":"semver"},{"version":"5.10.270","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.221","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.188","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.52","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/5aaa7409c1b4ca4c60d66e2afa99703bf4eb7ddd"},{"url":"https://git.kernel.org/stable/c/9b78ab84ddf97c06a8567edb62b6c0fd582f9a62"},{"url":"https://git.kernel.org/stable/c/9d18c6c6cd1666b2cb7915cad052e22abf520997"},{"url":"https://git.kernel.org/stable/c/4bcef54e4a3355a62d9ad90729fe563435ec76c3"},{"url":"https://git.kernel.org/stable/c/b14c22c31d9e30f38ea1693ac06d318f32258f5d"},{"url":"https://git.kernel.org/stable/c/7abe769e72c792e5f9eb273813eb3ecd8389854c"},{"url":"https://git.kernel.org/stable/c/200460a0793dc6af97d3b36d92ac245350ac26fc"},{"url":"https://git.kernel.org/stable/c/a66734a1c5e36525ea07e9f4547fddc51e916de3"}],"title":"net: qualcomm: rmnet: restore skb->dev on deaggregated frames","x_generator":{"engine":"bippy-1.2.0"}}}}