# CVE-2022-48691: linux: In the Linux kernel, the following vulnerability has been resolved:  netfilter: nf_tables: clean up hook list when of...

CVE-2022-48691 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48691, released May 3, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48691
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 3, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  netfilter: nf_tables: clean up hook list when offload flags check fails  splice back the hook list so nft_chain_release_hook() has a chance to release the hooks.  BUG: memory leak unreferenced object 0xffff88810180b100 (size 96):   comm "syz-executor133", pid 3619, jiffies 4294945714 (age 12.690s)   hex dump (first 32 bytes):     28 64 23 02 81 88 ff ff 28 64 23 02 81 88 ff ff  (d#.....(d#.....     90 a8 aa 83 ff ff ff ff 00 00 b5 0f 81 88 ff ff  ................   backtrace:     [<ffffffff83a8c59b>] kmalloc include/linux/slab.h:600 [inline]     [<ffffffff83a8c59b>] nft_netdev_hook_alloc+0x3b/0xc0 net/netfilter/nf_tables_api.c:1901     [<ffffffff83a9239a>] nft_chain_parse_netdev net/netfilter/nf_tables_api.c:1998 [inline]     [<ffffffff83a9239a>] nft_chain_parse_hook+0x33a/0x530 net/netfilter/nf_tables_api.c:2073     [<ffffffff83a9b14b>] nf_tables_addchain.constprop.0+0x10b/0x950 net/netfilter/nf_tables_api.c:2218     [<ffffffff83a9c41b>] nf_tables_newchain+0xa8b/0xc60 net/netfilter/nf_tables_api.c:2593     [<ffffffff83a3d6a6>] nfnetlink_rcv_batch+0xa46/0xd20 net/netfilter/nfnetlink.c:517     [<ffffffff83a3db79>] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:638 [inline]     [<ffffffff83a3db79>] nfnetlink_rcv+0x1f9/0x220 net/netfilter/nfnetlink.c:656     [<ffffffff83a13b17>] netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]     [<ffffffff83a13b17>] netlink_unicast+0x397/0x4c0 net/netlink/af_netlink.c:1345     [<ffffffff83a13fd6>] netlink_sendmsg+0x396/0x710 net/netlink/af_netlink.c:1921     [<ffffffff83865ab6>] sock_sendmsg_nosec net/socket.c:714 [inline]     [<ffffffff83865ab6>] sock_sendmsg+0x56/0x80 net/socket.c:734     [<ffffffff8386601c>] ____sys_sendmsg+0x36c/0x390 net/socket.c:2482     [<ffffffff8386a918>] ___sys_sendmsg+0xa8/0x110 net/socket.c:2536     [<ffffffff8386aaa8>] __sys_sendmsg+0x88/0x100 net/socket.c:2565     [<ffffffff845e5955>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]     [<ffffffff845e5955>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80     [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.19.11-1 | [DEBIAN-CVE-2022-48691](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48691.md) | May 3, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.19.11-1 | [DEBIAN-CVE-2022-48691](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48691.md) | May 3, 2024 |
| Linux | linux Debian 14 | 5.19.11-1 | [DEBIAN-CVE-2022-48691](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48691.md) | May 3, 2024 |

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