CVSS: -EPSS: 0%CPEs: 10EXPL: 0CVE-2024-40910 – ax25: Fix refcount imbalance on inbound connections
https://notcve.org/view.php?id=CVE-2024-40910
In the Linux kernel, the following vulnerability has been resolved: ax25: Fix refcount imbalance on inbound connections When releasing a socket in ax25_release(), we call netdev_put() to decrease the refcount on the associated ax.25 device. However, the execution path for accepting an incoming connection never calls netdev_hold(). This imbalance leads to refcount errors, and ultimately to kernel crashes. A typical call trace for the above situation will start with one of the following errors: refcount_t: decrement hit 0; leaking memory. refcount_t: underflow; use-after-free. And will then have a trace like: Call Trace: <TASK> ? show_regs+0x64/0x70 ? __warn+0x83/0x120 ? • https://git.kernel.org/stable/c/9fd75b66b8f68498454d685dc4ba13192ae069b0 https://git.kernel.org/stable/c/c44a453ffe16eb08acdc6129ac4fa0192dbc0456 https://git.kernel.org/stable/c/de55a1338e6a48ff1e41ea8db1432496fbe2a62b https://git.kernel.org/stable/c/9e1e088a57c23251f1cfe9601bbd90ade2ea73b9 https://git.kernel.org/stable/c/b20a5ab0f5fb175750c6bafd4cf12daccf00c738 https://git.kernel.org/stable/c/452ae92b99062d2f6a34324eaf705a3b7eac9f8b https://git.kernel.org/stable/c/534156dd4ed768e30a43de0036f45dca7c54818f https://git.kernel.org/stable/c/f4df9d6c8d4e4c818252b0419c2165d66 •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-40909 – bpf: Fix a potential use-after-free in bpf_link_free()
https://notcve.org/view.php?id=CVE-2024-40909
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free in bpf_link_free() After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation. • https://git.kernel.org/stable/c/876941f533e7b47fc69977fc4551c02f2d18af97 https://git.kernel.org/stable/c/1a80dbcb2dbaf6e4c216e62e30fa7d3daa8001ce https://git.kernel.org/stable/c/5d8d447777564b35f67000e7838e7ccb64d525c8 https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209 https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382 https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-40908 – bpf: Set run context for rawtp test_run callback
https://notcve.org/view.php?id=CVE-2024-40908
In the Linux kernel, the following vulnerability has been resolved: bpf: Set run context for rawtp test_run callback syzbot reported crash when rawtp program executed through the test_run interface calls bpf_get_attach_cookie helper or any other helper that touches task->bpf_ctx pointer. Setting the run context (task->bpf_ctx pointer) for test_run callback. • https://git.kernel.org/stable/c/7adfc6c9b315e174cf8743b21b7b691c8766791b https://git.kernel.org/stable/c/789bd77c9342aa6125003871ae5c6034d0f6f9d2 https://git.kernel.org/stable/c/3708b6c2546c9eb34aead8a34a17e8ae69004e4d https://git.kernel.org/stable/c/d387805d4b4a46ee01e3dae133c81b6d80195e5b https://git.kernel.org/stable/c/ae0ba0ab7475a129ef7d449966edf677367efeb4 https://git.kernel.org/stable/c/d0d1df8ba18abc57f28fb3bc053b2bf319367f2c •
CVSS: 7.3EPSS: 0%CPEs: 4EXPL: 0CVE-2024-40906 – net/mlx5: Always stop health timer during driver removal
https://notcve.org/view.php?id=CVE-2024-40906
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Always stop health timer during driver removal Currently, if teardown_hca fails to execute during driver removal, mlx5 does not stop the health timer. Afterwards, mlx5 continue with driver teardown. This may lead to a UAF bug, which results in page fault Oops[1], since the health timer invokes after resources were freed. Hence, stop the health monitor even if teardown_hca fails. [1] mlx5_core 0000:18:00.0: E-Switch: Unload vfs: mode(LEGACY), nvfs(0), necvfs(0), active vports(0) mlx5_core 0000:18:00.0: E-Switch: Disable: mode(LEGACY), nvfs(0), necvfs(0), active vports(0) mlx5_core 0000:18:00.0: E-Switch: Disable: mode(LEGACY), nvfs(0), necvfs(0), active vports(0) mlx5_core 0000:18:00.0: E-Switch: cleanup mlx5_core 0000:18:00.0: wait_func:1155:(pid 1967079): TEARDOWN_HCA(0x103) timeout. Will cause a leak of a command resource mlx5_core 0000:18:00.0: mlx5_function_close:1288:(pid 1967079): tear_down_hca failed, skip cleanup BUG: unable to handle page fault for address: ffffa26487064230 PGD 100c00067 P4D 100c00067 PUD 100e5a067 PMD 105ed7067 PTE 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 0 PID: 0 Comm: swapper/0 Tainted: G OE ------- --- 6.7.0-68.fc38.x86_64 #1 Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0013.121520200651 12/15/2020 RIP: 0010:ioread32be+0x34/0x60 RSP: 0018:ffffa26480003e58 EFLAGS: 00010292 RAX: ffffa26487064200 RBX: ffff9042d08161a0 RCX: ffff904c108222c0 RDX: 000000010bbf1b80 RSI: ffffffffc055ddb0 RDI: ffffa26487064230 RBP: ffff9042d08161a0 R08: 0000000000000022 R09: ffff904c108222e8 R10: 0000000000000004 R11: 0000000000000441 R12: ffffffffc055ddb0 R13: ffffa26487064200 R14: ffffa26480003f00 R15: ffff904c108222c0 FS: 0000000000000000(0000) GS:ffff904c10800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffa26487064230 CR3: 00000002c4420006 CR4: 00000000007706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <IRQ> ? __die+0x23/0x70 ? • https://git.kernel.org/stable/c/9b98d395b85dd042fe83fb696b1ac02e6c93a520 https://git.kernel.org/stable/c/e7d4485d47839f4d1284592ae242c4e65b2810a9 https://git.kernel.org/stable/c/6ccada6ffb42e0ac75e3db06d41baf5a7f483f8a https://git.kernel.org/stable/c/e6777ae0bf6fd5bc626bb051c8c93e3c8198a3f8 https://git.kernel.org/stable/c/c8b3f38d2dae0397944814d691a419c451f9906f https://access.redhat.com/security/cve/CVE-2024-40906 https://bugzilla.redhat.com/show_bug.cgi?id=2297490 • CWE-416: Use After Free •
CVSS: 4.4EPSS: 0%CPEs: 7EXPL: 0CVE-2024-40905 – ipv6: fix possible race in __fib6_drop_pcpu_from()
https://notcve.org/view.php?id=CVE-2024-40905
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible race in __fib6_drop_pcpu_from() syzbot found a race in __fib6_drop_pcpu_from() [1] If compiler reads more than once (*ppcpu_rt), second read could read NULL, if another cpu clears the value in rt6_get_pcpu_route(). Add a READ_ONCE() to prevent this race. Also add rcu_read_lock()/rcu_read_unlock() because we rely on RCU protection while dereferencing pcpu_rt. [1] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] CPU: 0 PID: 7543 Comm: kworker/u8:17 Not tainted 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: netns cleanup_net RIP: 0010:__fib6_drop_pcpu_from.part.0+0x10a/0x370 net/ipv6/ip6_fib.c:984 Code: f8 48 c1 e8 03 80 3c 28 00 0f 85 16 02 00 00 4d 8b 3f 4d 85 ff 74 31 e8 74 a7 fa f7 49 8d bf 90 00 00 00 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 1e 02 00 00 49 8b 87 90 00 00 00 48 8b 0c 24 48 RSP: 0018:ffffc900040df070 EFLAGS: 00010206 RAX: 0000000000000012 RBX: 0000000000000001 RCX: ffffffff89932e16 RDX: ffff888049dd1e00 RSI: ffffffff89932d7c RDI: 0000000000000091 RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000007 R10: 0000000000000001 R11: 0000000000000006 R12: ffff88807fa080b8 R13: fffffbfff1a9a07d R14: ffffed100ff41022 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32c26000 CR3: 000000005d56e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __fib6_drop_pcpu_from net/ipv6/ip6_fib.c:966 [inline] fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1027 [inline] fib6_purge_rt+0x7f2/0x9f0 net/ipv6/ip6_fib.c:1038 fib6_del_route net/ipv6/ip6_fib.c:1998 [inline] fib6_del+0xa70/0x17b0 net/ipv6/ip6_fib.c:2043 fib6_clean_node+0x426/0x5b0 net/ipv6/ip6_fib.c:2205 fib6_walk_continue+0x44f/0x8d0 net/ipv6/ip6_fib.c:2127 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2175 fib6_clean_tree+0xd7/0x120 net/ipv6/ip6_fib.c:2255 __fib6_clean_all+0x100/0x2d0 net/ipv6/ip6_fib.c:2271 rt6_sync_down_dev net/ipv6/route.c:4906 [inline] rt6_disable_ip+0x7ed/0xa00 net/ipv6/route.c:4911 addrconf_ifdown.isra.0+0x117/0x1b40 net/ipv6/addrconf.c:3855 addrconf_notify+0x223/0x19e0 net/ipv6/addrconf.c:3778 notifier_call_chain+0xb9/0x410 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1992 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline] call_netdevice_notifiers net/core/dev.c:2044 [inline] dev_close_many+0x333/0x6a0 net/core/dev.c:1585 unregister_netdevice_many_notify+0x46d/0x19f0 net/core/dev.c:11193 unregister_netdevice_many net/core/dev.c:11276 [inline] default_device_exit_batch+0x85b/0xae0 net/core/dev.c:11759 ops_exit_list+0x128/0x180 net/core/net_namespace.c:178 cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:640 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 • https://git.kernel.org/stable/c/d52d3997f843ffefaa8d8462790ffcaca6c74192 https://git.kernel.org/stable/c/c90af1cced2f669a7b2304584be4ada495eaa0e5 https://git.kernel.org/stable/c/c693698787660c97950bc1f93a8dd19d8307153d https://git.kernel.org/stable/c/a0bc020592b54a8f3fa2b7f244b6e39e526c2e12 https://git.kernel.org/stable/c/2498960dac9b6fc49b6d1574f7cd1a4872744adf https://git.kernel.org/stable/c/7e796c3fefa8b17b30e7252886ae8cffacd2b9ef https://git.kernel.org/stable/c/09e5a5a80e205922151136069e440477d6816914 https://git.kernel.org/stable/c/b01e1c030770ff3b4fe37fc7cc6bca03f • CWE-476: NULL Pointer Dereference •