iommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Fix potential buffer overflow in parse_ivrs_acpihid There is a string parsing logic error which can lead to an overflow of hid or uid buffers. Comparing ACPIID_LEN against a total string length doesn't take into account the lengths of individual hid and uid buffers so the check is insufficient in some cases. For example if the length of hid string is 4 and the length of the uid string is 260, the length of str will be equal to ACPIID_LEN + 1 but uid string will overflow uid buffer which size is 256. The same applies to the hid string with length 13 and uid string with length 250. Check the length of hid and uid strings separately to prevent buffer overflow. Found by Linux Verification Center (linuxtesting.org) with SVACE.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
4.7
References 8
git.kernel.org
- stable/c/2b65060c84ee4d8dc64fae6d2728b528e9e832e1
- stable/c/a65ebfed65fa62797ec1f5f1dcf7adb157a2de1e
- stable/c/466d9da267079a8d3b69fa72dfa3a732e1f6dbb5
- stable/c/c3f37faa71f5d26dd2144b3f2b14525ec8f5e41f
- stable/c/13d67528e1ae4486e9ab24b70122fab104c73c29
- stable/c/10d901a95f8e766e5aa0bb9a983fb41271f64718
- stable/c/c8bdfc0297965bb13fa439d36ca9c4f7c8447f0f
- stable/c/8dee308e4c01dea48fc104d37f92d5b58c50b96c