CVE-2022-49058
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.87%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.87% probability · 57th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-120
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1316c28569a80ab3596eeab05bf5e01991e7e739Patch
- https://git.kernel.org/stable/c/22d658c6c5affed10c8907e67160cef0b6c92186Patch
- https://git.kernel.org/stable/c/3e582749e742e662a8e9bb37cffac62dccaaa1e2Patch
- https://git.kernel.org/stable/c/4e166a41180be2f1e66bbb6d46448e80a9a5ec05Patch
- https://git.kernel.org/stable/c/515e7ba11ef043d6febe69389949c8ef5f25e9d0Patch
- https://git.kernel.org/stable/c/64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304Patch
- https://git.kernel.org/stable/c/9901b07ba42b39266b34a888e48d7306fd707beePatch
- https://git.kernel.org/stable/c/eb5f51756944735ac70cd8bb38637cc202e29c91Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.