In the Linux kernel, the following vulnerability has been resolved:
ipv6: mcast: fix data-race in ipv6_mc_down / mld_ifc_work
idev->mc_ifc_count can be written over without proper locking.
Originally found by syzbot [1], fix this issue by encapsulating calls
to mld_ifc_stop_work() (and mld_gq_stop_work() for good measure) with
mutex_lock() and mutex_unlock() accordingly as these functions
should only be called with mc_lock per their declarations.
[1]
BUG: KCSAN: data-race in ipv6_mc_down / mld_ifc_work
write to 0xffff88813a80c832 of 1 bytes by task 3771 on cpu 0:
mld_ifc_stop_work net/ipv6/mcast.c:1080 [inline]
ipv6_mc_down+0x10a/0x280 net/ipv6/mcast.c:2725
addrconf_ifdown+0xe32/0xf10 net/ipv6/addrconf.c:3949
addrconf_notify+0x310/0x980
notifier_call_chain kernel/notifier.c:93 [inline]
raw_notifier_call_chain+0x6b/0x1c0 kernel/notifier.c:461
__dev_notify_flags+0x205/0x3d0
dev_change_flags+0xab/0xd0 net/core/dev.c:8685
do_setlink+0x9f6/0x2430 net/core/rtnetlink.c:2916
rtnl_group_changelink net/core/rtnetlink.c:3458 [inline]
__rtnl_newlink net/core/rtnetlink.c:3717 [inline]
rtnl_newlink+0xbb3/0x1670 net/core/rtnetlink.c:3754
rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6558
netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2545
rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6576
netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
netlink_unicast+0x589/0x650 net/netlink/af_netlink.c:1368
netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c:1910
...
write to 0xffff88813a80c832 of 1 bytes by task 22 on cpu 1:
mld_ifc_work+0x54c/0x7b0 net/ipv6/mcast.c:2653
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2700
worker_thread+0x525/0x730 kernel/workqueue.c:2781
...
References
| Link | Resource |
|---|---|
| https://git.kernel.org/stable/c/2e7ef287f07c74985f1bf2858bedc62bd9ebf155 | Mailing List Patch |
| https://git.kernel.org/stable/c/2e7ef287f07c74985f1bf2858bedc62bd9ebf155 | Mailing List Patch |
| https://git.kernel.org/stable/c/380540bb06bb1d1b12bdc947d1b8f56cda6b5663 | Mailing List Patch |
| https://git.kernel.org/stable/c/380540bb06bb1d1b12bdc947d1b8f56cda6b5663 | Mailing List Patch |
| https://git.kernel.org/stable/c/3bb5849675ae1d592929798a2b37ea450879c855 | Mailing List Patch |
| https://git.kernel.org/stable/c/3bb5849675ae1d592929798a2b37ea450879c855 | Mailing List Patch |
| https://git.kernel.org/stable/c/3cc283fd16fba72e2cefe3a6f48d7a36b0438900 | Mailing List Patch |
| https://git.kernel.org/stable/c/3cc283fd16fba72e2cefe3a6f48d7a36b0438900 | Mailing List Patch |
| https://git.kernel.org/stable/c/62b3387beef11738eb6ce667601a28fa089fa02c | Mailing List Patch |
| https://git.kernel.org/stable/c/62b3387beef11738eb6ce667601a28fa089fa02c | Mailing List Patch |
Configurations
Configuration 1 (hide)
|
History
21 Nov 2024, 09:02
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-667 | |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/62b3387beef11738eb6ce667601a28fa089fa02c - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/3cc283fd16fba72e2cefe3a6f48d7a36b0438900 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/3bb5849675ae1d592929798a2b37ea450879c855 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/380540bb06bb1d1b12bdc947d1b8f56cda6b5663 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/2e7ef287f07c74985f1bf2858bedc62bd9ebf155 - Mailing List, Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.7 |
18 Mar 2024, 11:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-03-18 11:15
Updated : 2025-03-10 15:46
NVD link : CVE-2024-26631
Mitre link : CVE-2024-26631
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-667
Improper Locking