CVE-2022-49058

Summary

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

cifs: potential buffer overflow in handling symlinks

Smatch printed a warning: arch/x86/crypto/poly1305_glue.c:198 poly1305_update_arch() error: __memcpy() 'dctx->buf' too small (16 vs u32max)

It's caused because Smatch marks 'link_len' as untrusted since it comes from sscanf(). Add a check to ensure that 'link_len' is not larger than the size of the 'link_str' buffer.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131 < 3e582749e742e662a8e9bb37cffac62dccaaa1e2affected
LinuxLinuxc69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131 < 1316c28569a80ab3596eeab05bf5e01991e7e739affected
LinuxLinuxc69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131 < eb5f51756944735ac70cd8bb38637cc202e29c91affected
LinuxLinuxc69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131 < 22d658c6c5affed10c8907e67160cef0b6c92186affected
LinuxLinuxc69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131 < 4e166a41180be2f1e66bbb6d46448e80a9a5ec05affected
LinuxLinuxc69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131 < 9901b07ba42b39266b34a888e48d7306fd707beeaffected
LinuxLinuxc69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131 < 515e7ba11ef043d6febe69389949c8ef5f25e9d0affected
LinuxLinuxc69c1b6eaea1b3e1eecf7ad2fba0208ac4a11131 < 64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304affected
LinuxLinux2.6.37affected
LinuxLinux0 < 2.6.37unaffected
LinuxLinux4.9.311 <= 4.9.*unaffected
LinuxLinux4.14.276 <= 4.14.*unaffected
LinuxLinux4.19.239 <= 4.19.*unaffected
LinuxLinux5.4.190 <= 5.4.*unaffected
LinuxLinux5.10.112 <= 5.10.*unaffected
LinuxLinux5.15.35 <= 5.15.*unaffected
LinuxLinux5.17.4 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References