ipv6: prevent UAF in ip6_send_skb()
In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent UAF in ip6_send_skb() syzbot reported an UAF in ip6_send_skb() [1] After ip6_local_out() has returned, we no longer can safely dereference rt, unless we hold rcu_read_lock(). A similar issue has been fixed in commit a688caa34beb ("ipv6: take rcu lock in rawv6_send_hdrinc()") Another potential issue in ip6_finish_output2() is handled in a separate patch. [1] BUG: KASAN: slab-use-after-free in ip6_send_skb+0x18d/0x230 net/ipv6/ip6_output.c:1964 Read of size 8 at addr ffff88806dde4858 by task syz.1.380/6530 CPU: 1 UID: 0 PID: 6530 Comm: syz.1.380 Not tainted 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 ip6_send_skb+0x18d/0x230 net/ipv6/ip6_output.c:1964 rawv6_push_pending_frames+0x75c/0x9e0 net/ipv6/raw.c:588 rawv6_sendmsg+0x19c7/0x23c0 net/ipv6/raw.c:926 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x1a6/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 do_iter_readv_writev+0x60a/0x890 vfs_writev+0x37c/0xbb0 fs/read_write.c:971 do_writev+0x1b1/0x350 fs/read_write.c:1018 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_sysca
CVE-2024-44987
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-2024-44987
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": "0625491493d9000e4556bf566d205c28c8e7dc4e",
"lessThan": "571567e0277008459750f0728f246086b2659429",
"versionType": "git"
},
{
"status": "affected",
"version": "0625491493d9000e4556bf566d205c28c8e7dc4e",
"lessThan": "ce2f6cfab2c637d0bd9762104023a15d0ab7c0a8",
"versionType": "git"
},
{
"status": "affected",
"version": "0625491493d9000e4556bf566d205c28c8e7dc4e",
"lessThan": "cb5880a0de12c7f618d2bdd84e2d985f1e06ed7e",
"versionType": "git"
},
{
"status": "affected",
"version": "0625491493d9000e4556bf566d205c28c8e7dc4e",
"lessThan": "24e93695b1239fbe4c31e224372be77f82dab69a",
"versionType": "git"
},
{
"status": "affected",
"version": "0625491493d9000e4556bf566d205c28c8e7dc4e",
"lessThan": "9a3e55afa95ed4ac9eda112d4f918af645d72f25",
"versionType": "git"
},
{
"status": "affected",
"version": "0625491493d9000e4556bf566d205c28c8e7dc4e",
"lessThan": "af1dde074ee2ed7dd5bdca4e7e8ba17f44e7b011",
"versionType": "git"
},
{
"status": "affected",
"version": "0625491493d9000e4556bf566d205c28c8e7dc4e",
"lessThan": "e44bd76dd072756e674f45c5be00153f4ded68b2",
"versionType": "git"
},
{
"status": "affected",
"version": "0625491493d9000e4556bf566d205c28c8e7dc4e",
"lessThan": "faa389b2fbaaec7fd27a390b4896139f9da662e3",
"versionType": "git"
}
],
"programFiles": [
"net/ipv6/ip6_output.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.32"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.32",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.19.321",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.283",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.225",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.166",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.107",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.48",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.10.7",
"versionType": "semver",
"lessThanOrEqual": "6.10.*"
},
{
"status": "unaffected",
"version": "6.11",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv6/ip6_output.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-44987
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #26703 · Revision 1
- Added to Heist Feed
- Publisher date