CVE-2024-26641
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-26641
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26641.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-26641
- Downstream
- Related
- Published
- 2024-03-18T10:19:07Z
- Modified
- 2025-10-09T03:14:13.334938Z
- Summary
- ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ip6tunnel: make sure to pull inner header in _ip6tnlrcv()
syzbot found _ip6tnl_rcv() could access unitiliazed data [1].
Call pskbinetmay_pull() to fix this, and initialize ipv6h variable after this call as it can change skb->head.
[1] BUG: KMSAN: uninit-value in _INETECNdecapsulate include/net/inetecn.h:253 [inline] BUG: KMSAN: uninit-value in INETECNdecapsulate include/net/inetecn.h:275 [inline] BUG: KMSAN: uninit-value in IP6ECNdecapsulate+0x7df/0x1e50 include/net/inetecn.h:321 _INETECNdecapsulate include/net/inetecn.h:253 [inline] INETECNdecapsulate include/net/inetecn.h:275 [inline] IP6ECNdecapsulate+0x7df/0x1e50 include/net/inetecn.h:321 ip6ip6dscpecndecapsulate+0x178/0x1b0 net/ipv6/ip6tunnel.c:727 _ip6tnlrcv+0xd4e/0x1590 net/ipv6/ip6tunnel.c:845 ip6tnlrcv+0xce/0x100 net/ipv6/ip6tunnel.c:888 grercv+0x143f/0x1870 ip6protocoldeliverrcu+0xda6/0x2a60 net/ipv6/ip6input.c:438 ip6inputfinish net/ipv6/ip6input.c:483 [inline] NFHOOK include/linux/netfilter.h:314 [inline] ip6input+0x15d/0x430 net/ipv6/ip6input.c:492 ip6mcinput+0xa7e/0xc80 net/ipv6/ip6input.c:586 dstinput include/net/dst.h:461 [inline] ip6rcvfinish+0x5db/0x870 net/ipv6/ip6input.c:79 NFHOOK include/linux/netfilter.h:314 [inline] ipv6rcv+0xda/0x390 net/ipv6/ip6input.c:310 _netifreceiveskbonecore net/core/dev.c:5532 [inline] _netifreceiveskb+0x1a6/0x5a0 net/core/dev.c:5646 netifreceiveskbinternal net/core/dev.c:5732 [inline] netifreceiveskb+0x58/0x660 net/core/dev.c:5791 tunrxbatched+0x3ee/0x980 drivers/net/tun.c:1555 tungetuser+0x53af/0x66d0 drivers/net/tun.c:2002 tunchrwriteiter+0x3af/0x5d0 drivers/net/tun.c:2048 callwriteiter include/linux/fs.h:2084 [inline] newsyncwrite fs/readwrite.c:497 [inline] vfswrite+0x786/0x1200 fs/readwrite.c:590 ksyswrite+0x20f/0x4c0 fs/readwrite.c:643 _dosyswrite fs/readwrite.c:655 [inline] _sesyswrite fs/readwrite.c:652 [inline] _x64syswrite+0x93/0xd0 fs/readwrite.c:652 dosyscallx64 arch/x86/entry/common.c:52 [inline] dosyscall64+0x6d/0x140 arch/x86/entry/common.c:83 entrySYSCALL64after_hwframe+0x63/0x6b
Uninit was created at: slabpostallochook+0x129/0xa70 mm/slab.h:768 slaballocnode mm/slub.c:3478 [inline] kmemcacheallocnode+0x5e9/0xb10 mm/slub.c:3523 kmallocreserve+0x13d/0x4a0 net/core/skbuff.c:560 _allocskb+0x318/0x740 net/core/skbuff.c:651 allocskb include/linux/skbuff.h:1286 [inline] allocskbwithfrags+0xc8/0xbd0 net/core/skbuff.c:6334 sockallocsendpskb+0xa80/0xbf0 net/core/sock.c:2787 tunallocskb drivers/net/tun.c:1531 [inline] tungetuser+0x1e8a/0x66d0 drivers/net/tun.c:1846 tunchrwriteiter+0x3af/0x5d0 drivers/net/tun.c:2048 callwriteiter include/linux/fs.h:2084 [inline] newsyncwrite fs/readwrite.c:497 [inline] vfswrite+0x786/0x1200 fs/readwrite.c:590 ksyswrite+0x20f/0x4c0 fs/readwrite.c:643 _dosyswrite fs/readwrite.c:655 [inline] _sesyswrite fs/readwrite.c:652 [inline] _x64syswrite+0x93/0xd0 fs/readwrite.c:652 dosyscallx64 arch/x86/entry/common.c:52 [inline] dosyscall64+0x6d/0x140 arch/x86/entry/common.c:83 entrySYSCALL64afterhwframe+0x63/0x6b
CPU: 0 PID: 5034 Comm: syz-executor331 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
- References
-
- https://security.netapp.com/advisory/ntap-20241108-0008/
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/350a6640fac4b53564ec20aa3f4a0922cb0ba5e6
- https://git.kernel.org/stable/c/8d975c15c0cd744000ca386247432d57b21f9df0
- https://git.kernel.org/stable/c/a9bc32879a08f23cdb80a48c738017e39aea1080
- https://git.kernel.org/stable/c/af6b5c50d47ab43e5272ad61935d0ed2e264d3f0
- https://git.kernel.org/stable/c/c835df3bcc14858ae9b27315dd7de76370b94f3a
- https://git.kernel.org/stable/c/d54e4da98bbfa8c257bdca94c49652d81d18a4d8
- 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
-
Introduced0d3c703a9d1723c7707e0680019ac8ff5922db42Fixeda9bc32879a08f23cdb80a48c738017e39aea1080
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0d3c703a9d1723c7707e0680019ac8ff5922db42Fixedaf6b5c50d47ab43e5272ad61935d0ed2e264d3f0
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0d3c703a9d1723c7707e0680019ac8ff5922db42Fixedd54e4da98bbfa8c257bdca94c49652d81d18a4d8
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0d3c703a9d1723c7707e0680019ac8ff5922db42Fixed350a6640fac4b53564ec20aa3f4a0922cb0ba5e6
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0d3c703a9d1723c7707e0680019ac8ff5922db42Fixedc835df3bcc14858ae9b27315dd7de76370b94f3a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0d3c703a9d1723c7707e0680019ac8ff5922db42Fixed8d975c15c0cd744000ca386247432d57b21f9df0