{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-89780", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89780", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-16T08:48:19.760Z", "updatedAt": "2026-10-19T08:52:32.479Z", "importedAt": "2026-10-24T01:58:35.090Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "net: qualcomm: rmnet: restore skb->dev on deaggregated frames", "summary": "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": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "378e25357ac78ad02fbc98bec9b4e3baaa916c5c", "status": "affected", "versionType": "git", "lessThan": "5aaa7409c1b4ca4c60d66e2afa99703bf4eb7ddd" }, { "version": "378e25357ac78ad02fbc98bec9b4e3baaa916c5c", "status": "affected", "versionType": "git", "lessThan": "9b78ab84ddf97c06a8567edb62b6c0fd582f9a62" }, { "version": "378e25357ac78ad02fbc98bec9b4e3baaa916c5c", "status": "affected", "versionType": "git", "lessThan": "9d18c6c6cd1666b2cb7915cad052e22abf520997" }, { "version": "378e25357ac78ad02fbc98bec9b4e3baaa916c5c", "status": "affected", "versionType": "git", "lessThan": "4bcef54e4a3355a62d9ad90729fe563435ec76c3" }, { "version": "378e25357ac78ad02fbc98bec9b4e3baaa916c5c", "status": "affected", "versionType": "git", "lessThan": "b14c22c31d9e30f38ea1693ac06d318f32258f5d" }, { "version": "378e25357ac78ad02fbc98bec9b4e3baaa916c5c", "status": "affected", "versionType": "git", "lessThan": "7abe769e72c792e5f9eb273813eb3ecd8389854c" }, { "version": "378e25357ac78ad02fbc98bec9b4e3baaa916c5c", "status": "affected", "versionType": "git", "lessThan": "200460a0793dc6af97d3b36d92ac245350ac26fc" }, { "version": "378e25357ac78ad02fbc98bec9b4e3baaa916c5c", "status": "affected", "versionType": "git", "lessThan": "a66734a1c5e36525ea07e9f4547fddc51e916de3" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.17", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.17" }, { "version": "5.10.270", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.221", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.188", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.157", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.110", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.52", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }