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CVE-2025-38476— rpl: Fix use-after-free in rpl_do_srh_inline().

EPSS 0.03% · P7

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinuxa7a29f9c361f8542604ef959ae6627f423b7a412< c09e21dfc08d8afb92d9ea3bee3457adbe3ef297affected
a7a29f9c361f8542604ef959ae6627f423b7a412< 8ba6c2362b85089b8972ac5f20b24fc71a4b8ffcaffected
a7a29f9c361f8542604ef959ae6627f423b7a412< e8101506ab86dd78f823b7028f2036a380f3a12aaffected
a7a29f9c361f8542604ef959ae6627f423b7a412< 62dcd9d6e61c39122d2f251a26829e2e55b0a11daffected
a7a29f9c361f8542604ef959ae6627f423b7a412< 06ec83b6c792fde1f710c1de3e836da6e257c4c4affected
a7a29f9c361f8542604ef959ae6627f423b7a412< 034b428aa3583373a5a20b1c5931bb2b3cae1f36affected
a7a29f9c361f8542604ef959ae6627f423b7a412< b640daa2822a39ff76e70200cb2b7b892b896dceaffected
5.7affected
… +8 more rows
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I. Basic Information for CVE-2025-38476

Vulnerability Information
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Vulnerability Title
rpl: Fix use-after-free in rpl_do_srh_inline().
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: rpl: Fix use-after-free in rpl_do_srh_inline(). Running lwt_dst_cache_ref_loop.sh in selftest with KASAN triggers the splat below [0]. rpl_do_srh_inline() fetches ipv6_hdr(skb) and accesses it after skb_cow_head(), which is illegal as the header could be freed then. Let's fix it by making oldhdr to a local struct instead of a pointer. [0]: [root@fedora net]# ./lwt_dst_cache_ref_loop.sh ... TEST: rpl (input) [ 57.631529] ================================================================== BUG: KASAN: slab-use-after-free in rpl_do_srh_inline.isra.0 (net/ipv6/rpl_iptunnel.c:174) Read of size 40 at addr ffff888122bf96d8 by task ping6/1543 CPU: 50 UID: 0 PID: 1543 Comm: ping6 Not tainted 6.16.0-rc5-01302-gfadd1e6231b1 #23 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: <IRQ> dump_stack_lvl (lib/dump_stack.c:122) print_report (mm/kasan/report.c:409 mm/kasan/report.c:521) kasan_report (mm/kasan/report.c:221 mm/kasan/report.c:636) kasan_check_range (mm/kasan/generic.c:175 (discriminator 1) mm/kasan/generic.c:189 (discriminator 1)) __asan_memmove (mm/kasan/shadow.c:94 (discriminator 2)) rpl_do_srh_inline.isra.0 (net/ipv6/rpl_iptunnel.c:174) rpl_input (net/ipv6/rpl_iptunnel.c:201 net/ipv6/rpl_iptunnel.c:282) lwtunnel_input (net/core/lwtunnel.c:459) ipv6_rcv (./include/net/dst.h:471 (discriminator 1) ./include/net/dst.h:469 (discriminator 1) net/ipv6/ip6_input.c:79 (discriminator 1) ./include/linux/netfilter.h:317 (discriminator 1) ./include/linux/netfilter.h:311 (discriminator 1) net/ipv6/ip6_input.c:311 (discriminator 1)) __netif_receive_skb_one_core (net/core/dev.c:5967) process_backlog (./include/linux/rcupdate.h:869 net/core/dev.c:6440) __napi_poll.constprop.0 (net/core/dev.c:7452) net_rx_action (net/core/dev.c:7518 net/core/dev.c:7643) handle_softirqs (kernel/softirq.c:579) do_softirq (kernel/softirq.c:480 (discriminator 20)) </IRQ> <TASK> __local_bh_enable_ip (kernel/softirq.c:407) __dev_queue_xmit (net/core/dev.c:4740) ip6_finish_output2 (./include/linux/netdevice.h:3358 ./include/net/neighbour.h:526 ./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) ip6_output (./include/linux/netfilter.h:306 net/ipv6/ip6_output.c:248) ip6_send_skb (net/ipv6/ip6_output.c:1983) rawv6_sendmsg (net/ipv6/raw.c:588 net/ipv6/raw.c:918) __sys_sendto (net/socket.c:714 (discriminator 1) net/socket.c:729 (discriminator 1) net/socket.c:2228 (discriminator 1)) __x64_sys_sendto (net/socket.c:2231) do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1)) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) RIP: 0033:0x7f68cffb2a06 Code: 5d e8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 75 19 83 e2 39 83 fa 08 75 11 e8 26 ff ff ff 66 0f 1f 44 00 00 48 8b 45 10 0f 05 <48> 8b 5d f8 c9 c3 0f 1f 40 00 f3 0f 1e fa 55 48 89 e5 48 83 ec 08 RSP: 002b:00007ffefb7c53d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000564cd69f10a0 RCX: 00007f68cffb2a06 RDX: 0000000000000040 RSI: 0000564cd69f10a4 RDI: 0000000000000003 RBP: 00007ffefb7c53f0 R08: 0000564cd6a032ac R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000202 R12: 0000564cd69f10a4 R13: 0000000000000040 R14: 00007ffefb7c66e0 R15: 0000564cd69f10a0 </TASK> Allocated by task 1543: kasan_save_stack (mm/kasan/common.c:48) kasan_save_track (mm/kasan/common.c:60 (discriminator 1) mm/kasan/common.c:69 (discriminator 1)) __kasan_slab_alloc (mm/kasan/common.c:319 mm/kasan/common.c:345) kmem_cache_alloc_node_noprof (./include/linux/kasan.h:250 mm/slub.c:4148 mm/slub.c:4197 mm/slub.c:4249) kmalloc_reserve (net/core/skbuff.c:581 (discriminator 88)) __alloc_skb (net/core/skbuff.c:669) __ip6_append_data (net/ipv6/ip6_output.c:1672 (discriminator 1)) ip6_ ---truncated---
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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rpl_do_srh_inline函数中存在释放后重用。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux a7a29f9c361f8542604ef959ae6627f423b7a412 ~ c09e21dfc08d8afb92d9ea3bee3457adbe3ef297 -
LinuxLinux 5.7 -

II. Public POCs for CVE-2025-38476

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III. Intelligence Information for CVE-2025-38476

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Same Patch Batch · Linux · 2025-07-28 · 29 CVEs total

CVE-2025-38484iio: backend: fix out-of-bound write
CVE-2025-38497usb: gadget: configfs: Fix OOB read on empty string write
CVE-2025-38496dm-bufio: fix sched in atomic context
CVE-2025-38495HID: core: ensure the allocated report buffer can contain the reserved report ID
CVE-2025-38494HID: core: do not bypass hid_hw_raw_request
CVE-2025-38493tracing/osnoise: Fix crash in timerlat_dump_stack()
CVE-2025-38492netfs: Fix race between cache write completion and ALL_QUEUED being set
CVE-2025-38491mptcp: make fallback action and fallback decision atomic
CVE-2025-38490net: libwx: remove duplicate page_pool_put_full_page()
CVE-2025-38489s390/bpf: Fix bpf_arch_text_poke() with new_addr == NULL again
CVE-2025-38488smb: client: fix use-after-free in crypt_message when using async crypto
CVE-2025-38487soc: aspeed: lpc-snoop: Don't disable channels that aren't enabled
CVE-2025-38485iio: accel: fxls8962af: Fix use after free in fxls8962af_fifo_flush
CVE-2025-38486soundwire: Revert "soundwire: qcom: Add set_channel_map api support"
CVE-2025-38468net/sched: Return NULL when htb_lookup_leaf encounters an empty rbtree
CVE-2025-38483comedi: das16m1: Fix bit shift out of bounds
CVE-2025-38482comedi: das6402: Fix bit shift out of bounds
CVE-2025-38481comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large
CVE-2025-38480comedi: Fix use of uninitialized data in insn_rw_emulate_bits()
CVE-2025-38478comedi: Fix initialization of data for instructions that write to subdevice

Showing top 20 of 29 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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