CVE-2023-52618 — block/rnbd-srv: Check for unlikely string overflow

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: block/rnbd-srv: Check for unlikely string overflow Since "dev_search_path" can technically be as large as PATH_MAX, there was a risk of truncation when copying it and a second string into "full_path" since it was also PATH_MAX sized. The W=1 builds were reporting this warning: drivers/block/rnbd/rnbd-srv.c: In function 'process_msg_open.isra': drivers/block/rnbd/rnbd-srv.c:616:51: warning: '%s' directive output may be truncated writing up to 254 bytes into a region of size between 0 and 4095 [-Wformat-truncation=] 616 | snprintf(full_path, PATH_MAX, "%s/%s", | ^~ In function 'rnbd_srv_get_full_path', inlined from 'process_msg_open.isra' at drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block/rnbd/rnbd-srv.c:616:17: note: 'snprintf' output between 2 and 4351 bytes into a destination of size 4096 616 | snprintf(full_path, PATH_MAX, "%s/%s", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 617 | dev_search_path, dev_name); | ~~~~~~~~~~~~~~~~~~~~~~~~~~ To fix this, unconditionally check for truncation (as was already done for the case where "%SESSNAME%" was present).

Affected (CNA)

Vendor / product	Versions
Linux / Linux	affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before 95bc866c11974d3e4a9d922275ea8127ff809cf7; affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before f6abd5e17da33eba15df2bddc93413e76c2b55f7; affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before af7bbdac89739e2e7380387fda598848d3b7010f; affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before 5b9ea86e662035a886ccb5c76d56793cba618827; affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before a2c6206f18104fba7f887bf4dbbfe4c41adc4339; affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before 9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41
Linux / Linux	affected 5.8; unaffected 0 before 5.8; unaffected 5.10.210 through 5.10.; unaffected 5.15.149 through 5.15.; unaffected 6.1.77 through 6.1.; unaffected 6.6.16 through 6.6.; unaffected 6.7.4 through 6.7.; unaffected 6.8 through

Vendor / product

Versions

Linux / Linux

affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before 95bc866c11974d3e4a9d922275ea8127ff809cf7; affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before f6abd5e17da33eba15df2bddc93413e76c2b55f7; affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before af7bbdac89739e2e7380387fda598848d3b7010f; affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before 5b9ea86e662035a886ccb5c76d56793cba618827; affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before a2c6206f18104fba7f887bf4dbbfe4c41adc4339; affected 2de6c8de192b9341ffa5e84afe1ce6196d4eef41 before 9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41

Linux / Linux

affected 5.8; unaffected 0 before 5.8; unaffected 5.10.210 through 5.10.*; unaffected 5.15.149 through 5.15.*; unaffected 6.1.77 through 6.1.*; unaffected 6.6.16 through 6.6.*; unaffected 6.7.4 through 6.7.*; unaffected 6.8 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.