ipv4: Fix uninit-value access in __ip_make_skb()
In the Linux kernel, the following vulnerability has been resolved: ipv4: Fix uninit-value access in __ip_make_skb() KMSAN reported uninit-value access in __ip_make_skb() [1]. __ip_make_skb() tests HDRINCL to know if the skb has icmphdr. However, HDRINCL can cause a race condition. If calling setsockopt(2) with IP_HDRINCL changes HDRINCL while __ip_make_skb() is running, the function will access icmphdr in the skb even if it is not included. This causes the issue reported by KMSAN. Check FLOWI_FLAG_KNOWN_NH on fl4->flowi4_flags instead of testing HDRINCL on the socket. Also, fl4->fl4_icmp_type and fl4->fl4_icmp_code are not initialized. These are union in struct flowi4 and are implicitly initialized by flowi4_init_output(), but we should not rely on specific union layout. Initialize these explicitly in raw_sendmsg(). [1] BUG: KMSAN: uninit-value in __ip_make_skb+0x2b74/0x2d20 net/ipv4/ip_output.c:1481 __ip_make_skb+0x2b74/0x2d20 net/ipv4/ip_output.c:1481 ip_finish_skb include/net/ip.h:243 [inline] ip_push_pending_frames+0x4c/0x5c0 net/ipv4/ip_output.c:1508 raw_sendmsg+0x2381/0x2690 net/ipv4/raw.c:654 inet_sendmsg+0x27b/0x2a0 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x274/0x3c0 net/socket.c:745 __sys_sendto+0x62c/0x7b0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0x130/0x200 net/socket.c:2199 do_syscall_64+0xd8/0x1f0 arch/x86/entry/common.c:83 entry_SYSCALL_64_
CVE-2024-36927
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-2024-36927
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": "566785731c6dd41ef815196ddc36d1ae30a63763",
"lessThan": "88c66f1879f322f11de34d37b2d3d87497afdcb6",
"versionType": "git"
},
{
"status": "affected",
"version": "a54ec573d9b81b05d368f8e6edc1b3e49f688658",
"lessThan": "20d3eb00ab81462d554ac6d09691b8d9aa5a5741",
"versionType": "git"
},
{
"status": "affected",
"version": "fc60067260c20da8cddcf968bec47416f3e2cde2",
"lessThan": "55bf541e018b76b3750cb6c6ea18c46e1ac5562e",
"versionType": "git"
},
{
"status": "affected",
"version": "99e5acae193e369b71217efe6f1dad42f3f18815",
"lessThan": "5db08343ddb1b239320612036c398e4e1bb52818",
"versionType": "git"
},
{
"status": "affected",
"version": "99e5acae193e369b71217efe6f1dad42f3f18815",
"lessThan": "f5c603ad4e6fcf42f84053e882ebe20184bb309e",
"versionType": "git"
},
{
"status": "affected",
"version": "99e5acae193e369b71217efe6f1dad42f3f18815",
"lessThan": "fc1092f51567277509563800a3c56732070b6aa4",
"versionType": "git"
},
{
"status": "affected",
"version": "dc4e3bb0710178c8d03fc43064e0a71fe7440cdd",
"versionType": "git"
},
{
"status": "affected",
"version": "022ea4374c319690c804706bda9dc42946d1556d",
"versionType": "git"
},
{
"status": "affected",
"version": "27c468ec1af113f6ae94fb5378f65e6038bd16e7",
"versionType": "git"
},
{
"status": "affected",
"version": "32a5a13d556e4f804e5a447a08c70b172d600707",
"versionType": "git"
},
{
"status": "affected",
"version": "9e3c96aed8fe32907e0a4bca05aad457629a820c",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.180",
"lessThan": "5.10.248",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.111",
"lessThan": "5.15.198",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.28",
"lessThan": "6.1.140",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.315",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.283",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.243",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.2.15",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.3.2",
"lessThan": "6.4",
"versionType": "semver"
}
],
"programFiles": [
"net/ipv4/ip_output.c",
"net/ipv4/raw.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.248",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.198",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.140",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.31",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.8.10",
"versionType": "semver",
"lessThanOrEqual": "6.8.*"
},
{
"status": "unaffected",
"version": "6.9",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv4/ip_output.c",
"net/ipv4/raw.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-36927
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26592 · Revision 1
- Added to Heist Feed
- Publisher date