netfilter: nft_tunnel: fix geneve_opt type confusion addition
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_tunnel: fix geneve_opt type confusion addition When handling multiple NFTA_TUNNEL_KEY_OPTS_GENEVE attributes, the parsing logic should place every geneve_opt structure one by one compactly. Hence, when deciding the next geneve_opt position, the pointer addition should be in units of char *. However, the current implementation erroneously does type conversion before the addition, which will lead to heap out-of-bounds write. [ 6.989857] ================================================================== [ 6.990293] BUG: KASAN: slab-out-of-bounds in nft_tunnel_obj_init+0x977/0xa70 [ 6.990725] Write of size 124 at addr ffff888005f18974 by task poc/178 [ 6.991162] [ 6.991259] CPU: 0 PID: 178 Comm: poc-oob-write Not tainted 6.1.132 #1 [ 6.991655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 [ 6.992281] Call Trace: [ 6.992423] [ 6.992586] dump_stack_lvl+0x44/0x5c [ 6.992801] print_report+0x184/0x4be [ 6.993790] kasan_report+0xc5/0x100 [ 6.994252] kasan_check_range+0xf3/0x1a0 [ 6.994486] memcpy+0x38/0x60 [ 6.994692] nft_tunnel_obj_init+0x977/0xa70 [ 6.995677] nft_obj_init+0x10c/0x1b0 [ 6.995891] nf_tables_newobj+0x585/0x950 [ 6.996922] nfnetlink_rcv_batch+0xdf9/0x1020 [ 6.998997] nfnetlink_rcv+0x1df/0x220 [ 6.999537] netlink_unicast+0x395/0x530 [ 7.000771] netlink_sendmsg+0x3d0/0x6d0 [ 7.001462] __sock_sendmsg+0x99/0xa0 [ 7.001707] _
CVE-2025-22056
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-22056
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "925d844696d9287f841d6b3e0ed62a35fb175970",
"lessThan": "31d49eb436f2da61280508d7adf8c9b473b967aa",
"versionType": "git"
},
{
"status": "affected",
"version": "925d844696d9287f841d6b3e0ed62a35fb175970",
"lessThan": "ca2adfc03cd6273f0b589fe65afc6f75e0fe116e",
"versionType": "git"
},
{
"status": "affected",
"version": "925d844696d9287f841d6b3e0ed62a35fb175970",
"lessThan": "a263d31c8c92e5919d41af57d9479cfb66323782",
"versionType": "git"
},
{
"status": "affected",
"version": "925d844696d9287f841d6b3e0ed62a35fb175970",
"lessThan": "28d88ee1e1cc8ac2d79aeb112717b97c5c833d43",
"versionType": "git"
},
{
"status": "affected",
"version": "925d844696d9287f841d6b3e0ed62a35fb175970",
"lessThan": "0a93a710d6df334b828ea064c6d39fda34f901dc",
"versionType": "git"
},
{
"status": "affected",
"version": "925d844696d9287f841d6b3e0ed62a35fb175970",
"lessThan": "446d94898c560ed2f61e26ae445858a4c4830762",
"versionType": "git"
},
{
"status": "affected",
"version": "925d844696d9287f841d6b3e0ed62a35fb175970",
"lessThan": "708e268acb3a446ad2a8a3d2e9bd41cc23660cd6",
"versionType": "git"
},
{
"status": "affected",
"version": "925d844696d9287f841d6b3e0ed62a35fb175970",
"lessThan": "1b755d8eb1ace3870789d48fbd94f386ad6e30be",
"versionType": "git"
}
],
"programFiles": [
"net/netfilter/nft_tunnel.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.236",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.180",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.134",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.87",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.23",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.11",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14.2",
"versionType": "semver",
"lessThanOrEqual": "6.14.*"
},
{
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/nft_tunnel.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-22056
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #26977 · Revision 1
- Added to Heist Feed
- Publisher date