CVE-2022-49374

Summary

In the Linux kernel, the following vulnerability has been resolved:

tipc: check attribute length for bearer name

syzbot reported uninit-value:

BUG: KMSAN: uninit-value in string_nocheck lib/vsprintf.c:644 [inline] BUG: KMSAN: uninit-value in string+0x4f9/0x6f0 lib/vsprintf.c:725 string_nocheck lib/vsprintf.c:644 [inline] string+0x4f9/0x6f0 lib/vsprintf.c:725 vsnprintf+0x2222/0x3650 lib/vsprintf.c:2806 vprintk_store+0x537/0x2150 kernel/printk/printk.c:2158 vprintk_emit+0x28b/0xab0 kernel/printk/printk.c:2256 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2283 vprintk+0x15f/0x180 kernel/printk/printk_safe.c:50 _printk+0x18d/0x1cf kernel/printk/printk.c:2293 tipc_enable_bearer net/tipc/bearer.c:371 [inline] __tipc_nl_bearer_enable+0x2022/0x22a0 net/tipc/bearer.c:1033 tipc_nl_bearer_enable+0x6c/0xb0 net/tipc/bearer.c:1042 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]

• Do sanity check the attribute length for TIPC_NLA_BEARER_NAME.
• Do not use 'illegal name' in printing message.

Affected Software

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://git.kernel.org/stable/c/f07670871f4d19e613740eebe210e7e9ea535973
• https://git.kernel.org/stable/c/8b91d0dfc839e67708c905648cd0e7507a2263e5
• https://git.kernel.org/stable/c/b8fac8e321044a9ac50f7185b4e9d91a7745e4b0
• https://git.kernel.org/stable/c/92a930fcf4250fe961f6238b99af0bc405799f39
• https://git.kernel.org/stable/c/292be63c382ce20673ee61dff1ee9ed4a3dcaae7
• https://git.kernel.org/stable/c/3af15272cde28fe5c8489174b8624e232c1775ec
• https://git.kernel.org/stable/c/7f36f798f89bf32c0164049cb0e3fd1af613d0bb

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