{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-46678", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.248Z", "datePublished": "2024-09-13T05:29:12.835Z", "dateUpdated": "2026-08-05T11:37:54.501Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:37:54.501Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: change ipsec_lock from spin lock to mutex\n\nIn the cited commit, bond->ipsec_lock is added to protect ipsec_list,\nhence xdo_dev_state_add and xdo_dev_state_delete are called inside\nthis lock. As ipsec_lock is a spin lock and such xfrmdev ops may sleep,\n\"scheduling while atomic\" will be triggered when changing bond's\nactive slave.\n\n[ 101.055189] BUG: scheduling while atomic: bash/902/0x00000200\n[ 101.055726] Modules linked in:\n[ 101.058211] CPU: 3 PID: 902 Comm: bash Not tainted 6.9.0-rc4+ #1\n[ 101.058760] Hardware name:\n[ 101.059434] Call Trace:\n[ 101.059436] \n[ 101.060873] dump_stack_lvl+0x51/0x60\n[ 101.061275] __schedule_bug+0x4e/0x60\n[ 101.061682] __schedule+0x612/0x7c0\n[ 101.062078] ? __mod_timer+0x25c/0x370\n[ 101.062486] schedule+0x25/0xd0\n[ 101.062845] schedule_timeout+0x77/0xf0\n[ 101.063265] ? asm_common_interrupt+0x22/0x40\n[ 101.063724] ? __bpf_trace_itimer_state+0x10/0x10\n[ 101.064215] __wait_for_common+0x87/0x190\n[ 101.064648] ? usleep_range_state+0x90/0x90\n[ 101.065091] cmd_exec+0x437/0xb20 [mlx5_core]\n[ 101.065569] mlx5_cmd_do+0x1e/0x40 [mlx5_core]\n[ 101.066051] mlx5_cmd_exec+0x18/0x30 [mlx5_core]\n[ 101.066552] mlx5_crypto_create_dek_key+0xea/0x120 [mlx5_core]\n[ 101.067163] ? bonding_sysfs_store_option+0x4d/0x80 [bonding]\n[ 101.067738] ? kmalloc_trace+0x4d/0x350\n[ 101.068156] mlx5_ipsec_create_sa_ctx+0x33/0x100 [mlx5_core]\n[ 101.068747] mlx5e_xfrm_add_state+0x47b/0xaa0 [mlx5_core]\n[ 101.069312] bond_change_active_slave+0x392/0x900 [bonding]\n[ 101.069868] bond_option_active_slave_set+0x1c2/0x240 [bonding]\n[ 101.070454] __bond_opt_set+0xa6/0x430 [bonding]\n[ 101.070935] __bond_opt_set_notify+0x2f/0x90 [bonding]\n[ 101.071453] bond_opt_tryset_rtnl+0x72/0xb0 [bonding]\n[ 101.071965] bonding_sysfs_store_option+0x4d/0x80 [bonding]\n[ 101.072567] kernfs_fop_write_iter+0x10c/0x1a0\n[ 101.073033] vfs_write+0x2d8/0x400\n[ 101.073416] ? alloc_fd+0x48/0x180\n[ 101.073798] ksys_write+0x5f/0xe0\n[ 101.074175] do_syscall_64+0x52/0x110\n[ 101.074576] entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nAs bond_ipsec_add_sa_all and bond_ipsec_del_sa_all are only called\nfrom bond_change_active_slave, which requires holding the RTNL lock.\nAnd bond_ipsec_add_sa and bond_ipsec_del_sa are xfrm state\nxdo_dev_state_add and xdo_dev_state_delete APIs, which are in user\ncontext. So ipsec_lock doesn't have to be spin lock, change it to\nmutex, and thus the above issue can be resolved." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable paths are entered from local configuration syscalls — xfrm netlink (`XFRM_MSG_NEWSA`/`DELSA` with `XFRMA_OFFLOAD_DEV`) and rtnetlink/sysfs writes that call `bond_change_active_slave()`. No remote peer data reaches this code; the auto-failover variant only lets an on-link party influence timing, not reach the code directly.\nAC:L - The atomic-sleep BUG is deterministic — a single active-slave change with offloaded SAs present reliably calls a sleeping `xdo_dev_state_add()` under `spin_lock_bh()`. For the RCU/UAF variant the attacker drives both sides of the race (one thread adding offloaded SAs, another enslaving/releasing the slave), so no uncontrolled condition is required.\nPR:L - Both entry points gate only on CAP_NET_ADMIN scoped to the network namespace (`netlink_net_capable()` in xfrm_user.c, netns-scoped rtnetlink/bonding options), which an unprivileged user obtains via `unshare -Urn` or holds inside a container that has a delegated offload-capable VF. Real root in the init namespace is not required.\nUI:N - The attacker performs all steps themselves — adding the offloaded xfrm state and changing the bond's active slave — with no action by any other user or administrator.\nS:U - The fault, the corrupted scheduler/lock state, and the freed objects all live in the kernel of the same host; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Sleeping inside the RCU read-side section defeats the `synchronize_rcu()` barrier in `__bond_release_one()`, so the sleeping caller resumes on a freed `slave`/`net_device` — a use-after-free that lets a heap-sprayed replacement object be read back through the driver's SA-programming path, exposing kernel memory.\nI:H - The same use-after-free gives a write primitive: `xs->xso.real_dev` and driver state are written through the stale `net_device`/`slave` allocation, and the fix's addition of `netdev_hold()`/`netdev_put()` confirms the object could be freed while still in use, which is exploitable for control-flow hijacking.\nA:H - The confirmed, trivially reproducible effect is `BUG: scheduling while atomic` with `bond->ipsec_lock` held across a context switch, causing spinning CPUs, soft lockups/deadlock, and a panic under `panic_on_warn`; the use-after-free independently crashes the kernel." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/bonding/bond_main.c", "include/net/bonding.h" ], "versions": [ { "version": "9a5605505d9c7dbfdb89cc29a8f5fc5cf9fd2334", "lessThan": "6b598069164ac1bb60996d6ff94e7f9169dbd2d3", "status": "affected", "versionType": "git" }, { "version": "9a5605505d9c7dbfdb89cc29a8f5fc5cf9fd2334", "lessThan": "56354b0a2c24a7828eeed7de4b4dc9652d9affa3", "status": "affected", "versionType": "git" }, { "version": "9a5605505d9c7dbfdb89cc29a8f5fc5cf9fd2334", "lessThan": "2aeeef906d5a526dc60cf4af92eda69836c39b1f", "status": "affected", "versionType": "git" }, { "version": "56ccdf868ab6010739a24a3d72c3e53fd0e1ace2", "status": "affected", "versionType": "git" }, { "version": "42ec69b9cd7d1f9a8b7420807f3a5d899ca99d28", "status": "affected", "versionType": "git" }, { "version": "5.10.54", "lessThan": "5.11", "status": "affected", "versionType": "semver" }, { "version": "5.13.6", "lessThan": "5.14", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/bonding/bond_main.c", "include/net/bonding.h" ], "versions": [ { "version": "5.14", "status": "affected" }, { "version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.49", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.8", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "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": "5.14", "versionEndExcluding": "6.6.49" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.10.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.54" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13.6" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/6b598069164ac1bb60996d6ff94e7f9169dbd2d3" }, { "url": "https://git.kernel.org/stable/c/56354b0a2c24a7828eeed7de4b4dc9652d9affa3" }, { "url": "https://git.kernel.org/stable/c/2aeeef906d5a526dc60cf4af92eda69836c39b1f" } ], "title": "bonding: change ipsec_lock from spin lock to mutex", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-29T15:12:41.184590Z", "id": "CVE-2024-46678", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-29T15:12:56.353Z" } } ] } }