CVE-2026-57918
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in...
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.
- Record
CVE-2026-57918- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L - Weakness
- CWE-191
- Updated
- 2026-11-02
EUVDEUVD-2026-39647
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.
- Record
EUVD-2026-39647- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-27p2-fpv6-cj8c
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in...
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.
- Record
GHSA-27p2-fpv6-cj8c- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L - Weakness
- CWE-191
- Updated
- 2026-11-02
NVD
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.
- Record
CVE-2026-57918- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L - Weakness
- CWE-191
- Updated
- 2026-11-02
OSV
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.
- Record
CVE-2026-57918- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L - Weakness
- CWE-191
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-57918
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.
- Record
DEBIAN-CVE-2026-57918- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-57918
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.
- Record
UBUNTU-CVE-2026-57918- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L - Updated
- 2026-11-02
OSVMGASA-2026-0438 No score
Updated libnfs package fixes a security vulnerability
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker. (CVE-2026-57918)
- Record
MGASA-2026-0438- Updated
- 2026-11-02
OSVopenSUSE-SU-2026:11246-1 No score
libnfs-devel-6.0.2-1.1 on GA media
These are all security issues fixed in the libnfs-devel-6.0.2-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:11246-1- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-57918 is a high vulnerability (CVSS 7.1) in Sahlberg Libnfs, published June 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. Fixed in libnfs 6.0.2-2.2.mga10.
References
github.com/sahlberg/libnfs/commit/935b8db712b3c6649bc57ddc276526c4a31680de
nvd.nist.gov/vuln/detail/CVE-2026-57918
security-tracker.debian.org/tracker/CVE-2026-57918
advisories.mageia.org/MGASA-2026-0438.html