Skip to content
CVE PROGRAM SOURCE RECORD7.1 High

CVE-2025-21719

ipmr: do not call mr_mfc_uses_dev() for unres entries

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: ipmr: do not call mr_mfc_uses_dev() for unres entries syzbot found that calling mr_mfc_uses_dev() for unres entries would crash [1], because c->mfc_un.res.minvif / c->mfc_un.res.maxvif alias to "struct sk_buff_head unresolved", which contain two pointers. This code never worked, lets remove it. [1] Unable to handle kernel paging request at virtual address ffff5fff2d536613 KASAN: maybe wild-memory-access in range [0xfffefff96a9b3098-0xfffefff96a9b309f] Modules linked in: CPU: 1 UID: 0 PID: 7321 Comm: syz.0.16 Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : mr_mfc_uses_dev net/ipv4/ipmr_base.c:290 [inline] pc : mr_table_dump+0x5a4/0x8b0 net/ipv4/ipmr_base.c:334 lr : mr_mfc_uses_dev net/ipv4/ipmr_base.c:289 [inline] lr : mr_table_dump+0x694/0x8b0 net/ipv4/ipmr_base.c:334 Call trace: mr_mfc_uses_dev net/ipv4/ipmr_base.c:290 [inline] (P) mr_table_dump+0x5a4/0x8b0 net/ipv4/ipmr_base.c:334 (P) mr_rtm_dumproute+0x254/0x454 net/ipv4/ipmr_base.c:382 ipmr_rtm_dumproute+0x248/0x4b4 net/ipv4/ipmr.c:2648 rtnl_dump_all+0x2e4/0x4e8 net/core/rtnetlink.c:4327 rtnl_dumpit+0x98/0x1d0 net/core/rtnetlink.c:6791 netlink_dump+0x4f0/0xbc0 net/netlink/af_netlink.c:2317 netlink_recvmsg+0x56c/0xe64 net/netlink/af_netlink.c:1973 sock_recvmsg_nosec net/socket.c:1033 [inline] sock_recvmsg net/socket.c:1055 [inline] sock_read_iter+0x2d8/0x40c net/socket.c:1125 new_sync_read fs/read_write.c:484 [inline] vfs_read+0x740/0x970 fs/read_write.c:565 ksys_read+0x15c/0x26c fs/read_write.c:708

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • cb167893f41e21e6bd283d78e53489289dc0592d to < 71a0fcb68c0a5f3ec912b540cd5d72148e6ee5f1affected
  • cb167893f41e21e6bd283d78e53489289dc0592d to < 53df27fd38f84bd3cd6b004eb4ff3c4903114f1daffected
  • cb167893f41e21e6bd283d78e53489289dc0592d to < 547ef7e8cbb98f966c8719a3e15d4e078aaa9b47affected
  • cb167893f41e21e6bd283d78e53489289dc0592d to < 57177c5f47a8da852f8d76cf6945cf803f8bb9e5affected
  • cb167893f41e21e6bd283d78e53489289dc0592d to < b379b3162ff55a70464c6a934ae9bf0497478a62affected
  • cb167893f41e21e6bd283d78e53489289dc0592d to < a099834a51ccf9bbba3de86a251b3433539abfdeaffected
  • cb167893f41e21e6bd283d78e53489289dc0592d to < 26bb7d991f04eeef47dfad23e533834995c26f7aaffected
  • cb167893f41e21e6bd283d78e53489289dc0592d to < 15a901361ec3fb1c393f91880e1cbf24ec0a88bdaffected

Linux Linux

Default version status: affected

  • 4.20affected
  • 0 to < 4.20unaffected
  • 5.4.291 to ≤ 5.4.*unaffected
  • 5.10.235 to ≤ 5.10.*unaffected
  • 5.15.179 to ≤ 5.15.*unaffected
  • 6.1.129 to ≤ 6.1.*unaffected
  • 6.6.76 to ≤ 6.6.*unaffected
  • 6.12.13 to ≤ 6.12.*unaffected
  • 6.13.2 to ≤ 6.13.*unaffected
  • 6.14 to ≤ *unaffected

References