CVE-2024-56614
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-56614
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56614.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-56614
- Downstream
- Related
- Published
- 2024-12-27T14:51:19Z
- Modified
- 2025-10-22T07:42:21.384950Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- xsk: fix OOB map writes when deleting elements
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
xsk: fix OOB map writes when deleting elements
Jordy says:
" In the xskmapdeleteelem function an unsigned integer (map->maxentries) is compared with a user-controlled signed integer (k). Due to implicit type conversion, a large unsigned value for map->max_entries can bypass the intended bounds check:
if (k >= map->max_entries) return -EINVAL;This allows k to hold a negative value (between -2147483648 and -2), which is then used as an array index in m->xsk_map[k], which results in an out-of-bounds access.
spin_lock_bh(&m->lock); map_entry = &m->xsk_map[k]; // Out-of-bounds map_entry old_xs = unrcu_pointer(xchg(map_entry, NULL)); // Oob write if (old_xs) xsk_map_sock_delete(old_xs, map_entry); spin_unlock_bh(&m->lock);The xchg operation can then be used to cause an out-of-bounds write. Moreover, the invalid mapentry passed to xskmapsockdelete can lead to further memory corruption. "
It indeed results in following splat:
[76612.897343] BUG: unable to handle page fault for address: ffffc8fc2e461108 [76612.904330] #PF: supervisor write access in kernel mode [76612.909639] #PF: errorcode(0x0002) - not-present page [76612.914855] PGD 0 P4D 0 [76612.917431] Oops: Oops: 0002 [#1] PREEMPT SMP [76612.921859] CPU: 11 UID: 0 PID: 10318 Comm: a.out Not tainted 6.12.0-rc1+ #470 [76612.929189] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019 [76612.939781] RIP: 0010:xskmapdeleteelem+0x2d/0x60 [76612.944738] Code: 00 00 41 54 55 53 48 63 2e 3b 6f 24 73 38 4c 8d a7 f8 00 00 00 48 89 fb 4c 89 e7 e8 2d bf 05 00 48 8d b4 eb 00 01 00 00 31 ff <48> 87 3e 48 85 ff 74 05 e8 16 ff ff ff 4c 89 e7 e8 3e bc 05 00 31 [76612.963774] RSP: 0018:ffffc9002e407df8 EFLAGS: 00010246 [76612.969079] RAX: 0000000000000000 RBX: ffffc9002e461000 RCX: 0000000000000000 [76612.976323] RDX: 0000000000000001 RSI: ffffc8fc2e461108 RDI: 0000000000000000 [76612.983569] RBP: ffffffff80000001 R08: 0000000000000000 R09: 0000000000000007 [76612.990812] R10: ffffc9002e407e18 R11: ffff888108a38858 R12: ffffc9002e4610f8 [76612.998060] R13: ffff888108a38858 R14: 00007ffd1ae0ac78 R15: ffffc9002e4610c0 [76613.005303] FS: 00007f80b6f59740(0000) GS:ffff8897e0ec0000(0000) knlGS:0000000000000000 [76613.013517] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [76613.019349] CR2: ffffc8fc2e461108 CR3: 000000011e3ef001 CR4: 00000000007726f0 [76613.026595] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [76613.033841] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [76613.041086] PKRU: 55555554 [76613.043842] Call Trace: [76613.046331] <TASK> [76613.048468] ? _die+0x20/0x60 [76613.051581] ? pagefaultoops+0x15a/0x450 [76613.055747] ? searchextable+0x22/0x30 [76613.059649] ? searchbpfextables+0x5f/0x80 [76613.063988] ? excpagefault+0xa9/0x140 [76613.067975] ? asmexcpagefault+0x22/0x30 [76613.072229] ? xskmapdeleteelem+0x2d/0x60 [76613.076573] ? xskmapdeleteelem+0x23/0x60 [76613.080914] _sysbpf+0x19b7/0x23c0 [76613.084555] _x64sysbpf+0x1a/0x20 [76613.088194] dosyscall64+0x37/0xb0 [76613.091832] entrySYSCALL64afterhwframe+0x4b/0x53 [76613.096962] RIP: 0033:0x7f80b6d1e88d [76613.100592] Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 b5 0f 00 f7 d8 64 89 01 48 [76613.119631] RSP: 002b:00007ffd1ae0ac68 EFLAGS: 00000206 ORIG_RAX: 0000000000000141 [76613.131330] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f80b6d1e88d [76613.142632] RDX: 0000000000000098 RSI: 00007ffd1ae0ad20 RDI: 0000000000000003 [76613.153967] RBP: 00007ffd1ae0adc0 R08: 0000000000000000 R09: 0000000000000000 [76613.166030] R10: 00007f80b6f77040 R11: 0000000000000206 R12: 00007ffd1ae0aed8 [76613.177130] R13: 000055ddf42ce1e9 R14: 000055ddf42d0d98 R15: 00 ---truncated---
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/32cd3db7de97c0c7a018756ce66244342fd583f0
- https://git.kernel.org/stable/c/4d03f705e9d7aabebc6bfa5810f8aab6d176cbb7
- https://git.kernel.org/stable/c/d486b5741d987d3e0e6be4ac22cafdf94e6d1a47
- https://git.kernel.org/stable/c/ed08c93d5a9801cc8f224a046411fd603c538d07
- https://git.kernel.org/stable/c/f8abd03f83d5fe81e76eb93e2c4373eb9f75fd8a
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfbfc504a24f53f7ebe128ab55cb5dba634f4ece8Fixed4d03f705e9d7aabebc6bfa5810f8aab6d176cbb7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfbfc504a24f53f7ebe128ab55cb5dba634f4ece8Fixeded08c93d5a9801cc8f224a046411fd603c538d07
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfbfc504a24f53f7ebe128ab55cb5dba634f4ece8Fixedf8abd03f83d5fe81e76eb93e2c4373eb9f75fd8a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfbfc504a24f53f7ebe128ab55cb5dba634f4ece8Fixedd486b5741d987d3e0e6be4ac22cafdf94e6d1a47
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfbfc504a24f53f7ebe128ab55cb5dba634f4ece8Fixed32cd3db7de97c0c7a018756ce66244342fd583f0