libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply()
In the Linux kernel, the following vulnerability has been resolved: libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply() If a message of type CEPH_MSG_AUTH_REPLY contains a zero value for both protocol and result, this is currently not treated as an error. In case of ac->negotiating == true and ac->protocol > 0, this leads to setting ac->protocol = 0 and ac->ops = NULL. Thereafter, the check for ac->protocol != protocol returns false, and init_protocol() is not called. Subsequently, ac->ops->handle_reply() is called, which leads to a null pointer dereference, because ac->ops is still NULL. This patch changes the check for ac->protocol != protocol to !ac->protocol, as this also includes the case when the protocol was set to zero in the message. This causes the message to be treated as containing a bad auth protocol.
CVE-2026-46024
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-46024
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc",
"lessThan": "9ded62c302c0342efdb5eda3bf6e75720caad0df",
"versionType": "git"
},
{
"status": "affected",
"version": "4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc",
"lessThan": "f101271fcf55d7eacfefd610b51ec65f46ba8118",
"versionType": "git"
},
{
"status": "affected",
"version": "4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc",
"lessThan": "4b2738b93edad661178340239de657d876b73d3d",
"versionType": "git"
},
{
"status": "affected",
"version": "4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc",
"lessThan": "927e4bd5692f2a4901808822981fb2c8d4456548",
"versionType": "git"
},
{
"status": "affected",
"version": "4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc",
"lessThan": "016bc663657366d386993f63eb31072eb45a2b77",
"versionType": "git"
},
{
"status": "affected",
"version": "4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc",
"lessThan": "8f2be7285941a33a9f72579a23b96392f83c758e",
"versionType": "git"
},
{
"status": "affected",
"version": "4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc",
"lessThan": "5199c125d25aeae8615c4fc31652cc0fe624338e",
"versionType": "git"
}
],
"programFiles": [
"net/ceph/auth.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.34"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.34",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.86",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.27",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.4",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ceph/auth.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46024
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40104 · Revision 1
- Added to Heist Feed
- Publisher date