CVE - CVE-2022-49197

CVE-ID
CVE-2022-49197	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: af_netlink: Fix shift out of bounds in group mask calculation When a netlink message is received, netlink_recvmsg() fills in the address of the sender. One of the fields is the 32-bit bitfield nl_groups, which carries the multicast group on which the message was received. The least significant bit corresponds to group 1, and therefore the highest group that the field can represent is 32. Above that, the UB sanitizer flags the out-of-bounds shift attempts. Which bits end up being set in such case is implementation defined, but it's either going to be a wrong non-zero value, or zero, which is at least not misleading. Make the latter choice deterministic by always setting to 0 for higher-numbered multicast groups. To get information about membership in groups >= 32, userspace is expected to use nl_pktinfo control messages[0], which are enabled by NETLINK_PKTINFO socket option. [0] https://lwn.net/Articles/147608/ The way to trigger this issue is e.g. through monitoring the BRVLAN group: # bridge monitor vlan & # ip link add name br type bridge Which produces the following citation: UBSAN: shift-out-of-bounds in net/netlink/af_netlink.c:162:19 shift exponent 32 is too large for 32-bit type 'int'
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0caf6d9922192dd1afa8dc2131abfb4df1443b9f URL:https://git.kernel.org/stable/c/0caf6d9922192dd1afa8dc2131abfb4df1443b9f MISC:https://git.kernel.org/stable/c/41249fff507387c3323b198d0052faed08b14de4 URL:https://git.kernel.org/stable/c/41249fff507387c3323b198d0052faed08b14de4 MISC:https://git.kernel.org/stable/c/7409ff6393a67ff9838d0ae1bd102fb5f020d07a URL:https://git.kernel.org/stable/c/7409ff6393a67ff9838d0ae1bd102fb5f020d07a MISC:https://git.kernel.org/stable/c/ac5883a8890a11c00b32a19949a25d4afeaa2f5a URL:https://git.kernel.org/stable/c/ac5883a8890a11c00b32a19949a25d4afeaa2f5a MISC:https://git.kernel.org/stable/c/b0898362188e05b2202656058cc32d98fabf3bac URL:https://git.kernel.org/stable/c/b0898362188e05b2202656058cc32d98fabf3bac MISC:https://git.kernel.org/stable/c/e1c5d46f05aa23d740daae5cd3a6472145afac42 URL:https://git.kernel.org/stable/c/e1c5d46f05aa23d740daae5cd3a6472145afac42 MISC:https://git.kernel.org/stable/c/e23e1e981247feb3c7d0236fe58aceb685f234ae URL:https://git.kernel.org/stable/c/e23e1e981247feb3c7d0236fe58aceb685f234ae MISC:https://git.kernel.org/stable/c/e8aaf3134bc5e943048eefe9f2ddaabf41d92b1a URL:https://git.kernel.org/stable/c/e8aaf3134bc5e943048eefe9f2ddaabf41d92b1a MISC:https://git.kernel.org/stable/c/f75f4abeec4c04b600a15b50c89a481f1e7435ee URL:https://git.kernel.org/stable/c/f75f4abeec4c04b600a15b50c89a481f1e7435ee
Assigning CNA
kernel.org
Date Record Created
20250226	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250226)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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