CVE-2024-26641— ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()
Possible ATT&CK Techniques 1AI
T1059 · Command and Scripting InterpreterAffected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 0d3c703a9d1723c7707e0680019ac8ff5922db42< a9bc32879a08f23cdb80a48c738017e39aea1080 | affected |
0d3c703a9d1723c7707e0680019ac8ff5922db42< af6b5c50d47ab43e5272ad61935d0ed2e264d3f0 | affected | ||
0d3c703a9d1723c7707e0680019ac8ff5922db42< d54e4da98bbfa8c257bdca94c49652d81d18a4d8 | affected | ||
0d3c703a9d1723c7707e0680019ac8ff5922db42< 350a6640fac4b53564ec20aa3f4a0922cb0ba5e6 | affected | ||
0d3c703a9d1723c7707e0680019ac8ff5922db42< c835df3bcc14858ae9b27315dd7de76370b94f3a | affected | ||
0d3c703a9d1723c7707e0680019ac8ff5922db42< 8d975c15c0cd744000ca386247432d57b21f9df0 | affected | ||
4.7 | affected | ||
< 4.7 | unaffected | ||
| … +6 more rows | |||
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I. Basic Information for CVE-2024-26641
Vulnerability Information
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Vulnerability Title
ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv() syzbot found __ip6_tnl_rcv() could access unitiliazed data [1]. Call pskb_inet_may_pull() to fix this, and initialize ipv6h variable after this call as it can change skb->head. [1] BUG: KMSAN: uninit-value in __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline] BUG: KMSAN: uninit-value in INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline] BUG: KMSAN: uninit-value in IP6_ECN_decapsulate+0x7df/0x1e50 include/net/inet_ecn.h:321 __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline] INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline] IP6_ECN_decapsulate+0x7df/0x1e50 include/net/inet_ecn.h:321 ip6ip6_dscp_ecn_decapsulate+0x178/0x1b0 net/ipv6/ip6_tunnel.c:727 __ip6_tnl_rcv+0xd4e/0x1590 net/ipv6/ip6_tunnel.c:845 ip6_tnl_rcv+0xce/0x100 net/ipv6/ip6_tunnel.c:888 gre_rcv+0x143f/0x1870 ip6_protocol_deliver_rcu+0xda6/0x2a60 net/ipv6/ip6_input.c:438 ip6_input_finish net/ipv6/ip6_input.c:483 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ip6_input+0x15d/0x430 net/ipv6/ip6_input.c:492 ip6_mc_input+0xa7e/0xc80 net/ipv6/ip6_input.c:586 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish+0x5db/0x870 net/ipv6/ip6_input.c:79 NF_HOOK include/linux/netfilter.h:314 [inline] ipv6_rcv+0xda/0x390 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core net/core/dev.c:5532 [inline] __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5646 netif_receive_skb_internal net/core/dev.c:5732 [inline] netif_receive_skb+0x58/0x660 net/core/dev.c:5791 tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1555 tun_get_user+0x53af/0x66d0 drivers/net/tun.c:2002 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:2084 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x786/0x1200 fs/read_write.c:590 ksys_write+0x20f/0x4c0 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:652 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x5e9/0xb10 mm/slub.c:3523 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560 __alloc_skb+0x318/0x740 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6334 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2787 tun_alloc_skb drivers/net/tun.c:1531 [inline] tun_get_user+0x1e8a/0x66d0 drivers/net/tun.c:1846 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:2084 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x786/0x1200 fs/read_write.c:590 ksys_write+0x20f/0x4c0 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:652 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于允许通过__ip6_tnl_rcv()访问数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-26641
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|---|
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Mailing List Discussions for CVE-2024-26641 (1)
Other References for CVE-2024-26641 (6)
Same Patch Batch · Linux · 2024-03-18 · 21 CVEs total
| CVE-2023-52616 | 7.8 HIGH | crypto: lib/mpi - Fix unexpected pointer access in mpi_ec_init |
| CVE-2024-26640 | 7.8 HIGH | tcp: add sanity checks to rx zerocopy |
| CVE-2024-26637 | 7.8 HIGH | wifi: ath11k: rely on mac80211 debugfs handling for vif |
| CVE-2023-52614 | 7.8 HIGH | PM / devfreq: Fix buffer overflow in trans_stat_show |
| CVE-2024-26632 | 7.8 HIGH | block: Fix iterating over an empty bio with bio_for_each_folio_all |
| CVE-2024-26631 | 7.8 HIGH | ipv6: mcast: fix data-race in ipv6_mc_down / mld_ifc_work |
| CVE-2023-52612 | 7.8 HIGH | crypto: scomp - fix req->dst buffer overflow |
| CVE-2023-52610 | 7.5 HIGH | net/sched: act_ct: fix skb leak and crash on ooo frags |
| CVE-2023-52613 | drivers/thermal/loongson2_thermal: Fix incorrect PTR_ERR() judgment | |
| CVE-2024-26633 | ip6_tunnel: fix NEXTHDR_FRAGMENT handling in ip6_tnl_parse_tlv_enc_lim() | |
| CVE-2023-52615 | hwrng: core - Fix page fault dead lock on mmap-ed hwrng | |
| CVE-2023-52609 | binder: fix race between mmput() and do_exit() | |
| CVE-2024-26634 | net: fix removing a namespace with conflicting altnames | |
| CVE-2024-26635 | llc: Drop support for ETH_P_TR_802_2. | |
| CVE-2023-52611 | wifi: rtw88: sdio: Honor the host max_req_size in the RX path | |
| CVE-2024-26636 | llc: make llc_ui_sendmsg() more robust against bonding changes | |
| CVE-2024-26638 | nbd: always initialize struct msghdr completely | |
| CVE-2023-52617 | PCI: switchtec: Fix stdev_release() crash after surprise hot remove | |
| CVE-2023-52618 | block/rnbd-srv: Check for unlikely string overflow | |
| CVE-2023-52619 | pstore/ram: Fix crash when setting number of cpus to an odd number |
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
Same vendor: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
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