CVE-2024-35896
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-35896
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-35896.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-35896
- Downstream
- Related
- Published
- 2024-05-19T08:34:51Z
- Modified
- 2025-10-09T10:02:57.564512Z
- Summary
- netfilter: validate user input for expected length
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netfilter: validate user input for expected length
I got multiple syzbot reports showing old bugs exposed by BPF after commit 20f2505fb436 ("bpf: Try to avoid kzalloc in cgroup/{s,g}etsockopt")
setsockopt() @optlen argument should be taken into account before copying data.
BUG: KASAN: slab-out-of-bounds in copyfromsockptroffset include/linux/sockptr.h:49 [inline] BUG: KASAN: slab-out-of-bounds in copyfromsockptr include/linux/sockptr.h:55 [inline] BUG: KASAN: slab-out-of-bounds in doreplace net/ipv4/netfilter/iptables.c:1111 [inline] BUG: KASAN: slab-out-of-bounds in doiptsetctl+0x902/0x3dd0 net/ipv4/netfilter/ip_tables.c:1627 Read of size 96 at addr ffff88802cd73da0 by task syz-executor.4/7238
CPU: 1 PID: 7238 Comm: syz-executor.4 Not tainted 6.9.0-rc2-next-20240403-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: <TASK> _dumpstack lib/dumpstack.c:88 [inline] dumpstacklvl+0x241/0x360 lib/dumpstack.c:114 printaddressdescription mm/kasan/report.c:377 [inline] printreport+0x169/0x550 mm/kasan/report.c:488 kasanreport+0x143/0x180 mm/kasan/report.c:601 kasancheckrange+0x282/0x290 mm/kasan/generic.c:189 _asanmemcpy+0x29/0x70 mm/kasan/shadow.c:105 copyfromsockptroffset include/linux/sockptr.h:49 [inline] copyfromsockptr include/linux/sockptr.h:55 [inline] doreplace net/ipv4/netfilter/iptables.c:1111 [inline] doiptsetctl+0x902/0x3dd0 net/ipv4/netfilter/iptables.c:1627 nfsetsockopt+0x295/0x2c0 net/netfilter/nfsockopt.c:101 dosocksetsockopt+0x3af/0x720 net/socket.c:2311 _syssetsockopt+0x1ae/0x250 net/socket.c:2334 _dosyssetsockopt net/socket.c:2343 [inline] _sesyssetsockopt net/socket.c:2340 [inline] _x64syssetsockopt+0xb5/0xd0 net/socket.c:2340 dosyscall64+0xfb/0x240 entrySYSCALL64afterhwframe+0x72/0x7a RIP: 0033:0x7fd22067dde9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd21f9ff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fd2207abf80 RCX: 00007fd22067dde9 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fd2206ca47a R08: 0000000000000001 R09: 0000000000000000 R10: 0000000020000880 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fd2207abf80 R15: 00007ffd2d0170d8 </TASK>
Allocated by task 7238: kasansavestack mm/kasan/common.c:47 [inline] kasansavetrack+0x3f/0x80 mm/kasan/common.c:68 poisonkmallocredzone mm/kasan/common.c:370 [inline] _kasankmalloc+0x98/0xb0 mm/kasan/common.c:387 kasankmalloc include/linux/kasan.h:211 [inline] _dokmallocnode mm/slub.c:4069 [inline] _kmallocnoprof+0x200/0x410 mm/slub.c:4082 kmallocnoprof include/linux/slab.h:664 [inline] _cgroupbpfrunfiltersetsockopt+0xd47/0x1050 kernel/bpf/cgroup.c:1869 dosocksetsockopt+0x6b4/0x720 net/socket.c:2293 _syssetsockopt+0x1ae/0x250 net/socket.c:2334 _dosyssetsockopt net/socket.c:2343 [inline] _sesyssetsockopt net/socket.c:2340 [inline] _x64syssetsockopt+0xb5/0xd0 net/socket.c:2340 dosyscall64+0xfb/0x240 entrySYSCALL64after_hwframe+0x72/0x7a
The buggy address belongs to the object at ffff88802cd73da0 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes inside of allocated 1-byte region [ffff88802cd73da0, ffff88802cd73da1)
The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802cd73020 pfn:0x2cd73 flags: 0xfff80000000000(node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffefff(slab) raw: 00fff80000000000 ffff888015041280 dead000000000100 dead000000000122 raw: ffff88802cd73020 000000008080007f 00000001ffffefff 00 ---truncated---
- References
-
- https://security.netapp.com/advisory/ntap-20250321-0004/
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/0c83842df40f86e529db6842231154772c20edcc
- https://git.kernel.org/stable/c/0f038242b77ddfc505bf4163d4904c1abd2e74d6
- https://git.kernel.org/stable/c/18aae2cb87e5faa9c5bd865260ceadac60d5a6c5
- https://git.kernel.org/stable/c/440e948cf0eff32cfe322dcbca3f2525354b159b
- https://git.kernel.org/stable/c/58f2bfb789e6bd3bc24a2c9c1580f3c67aec3018
- https://git.kernel.org/stable/c/81d51b9b7c95e791ba3c1a2dd77920a9d3b3f525
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
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
-
Introduced1da177e4c3f41524e886b7f1b8a0c1fc7321cac2Fixed0f038242b77ddfc505bf4163d4904c1abd2e74d6
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1da177e4c3f41524e886b7f1b8a0c1fc7321cac2Fixed440e948cf0eff32cfe322dcbca3f2525354b159b
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1da177e4c3f41524e886b7f1b8a0c1fc7321cac2Fixed18aae2cb87e5faa9c5bd865260ceadac60d5a6c5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1da177e4c3f41524e886b7f1b8a0c1fc7321cac2Fixed81d51b9b7c95e791ba3c1a2dd77920a9d3b3f525
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1da177e4c3f41524e886b7f1b8a0c1fc7321cac2Fixed58f2bfb789e6bd3bc24a2c9c1580f3c67aec3018
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1da177e4c3f41524e886b7f1b8a0c1fc7321cac2Fixed0c83842df40f86e529db6842231154772c20edcc