CVE-2026-3904
published 2026-03-11CVE-2026-3904: Calling NSS-backed functions that support caching via nscd may call the nscd client side code and in the GNU C Library version 2.36 under high load on x86_64…
PriorityP424medium6.2CVSS 3.1
AVLACLPRNUINSUCNINAH
EPSS
0.15%
4.0th percentile
Calling NSS-backed functions that support caching via nscd may call the
nscd client side code and in the GNU C Library version 2.36 under high
load on x86_64 systems, the client may call memcmp on inputs that are
concurrently modified by other processes or threads and crash.
The nscd client in the GNU C Library uses the memcmp function with
inputs that may be concurrently modified by another thread, potentially
resulting in spurious cache misses, which in itself is not a security
issue. However in the GNU C Library version 2.36 an optimized
implementation of memcmp was introduced for x86_64 which could crash
when invoked with such undefined behaviour, turning this into a
potential crash of the nscd client and the application that uses it.
This implementation was backported to the 2.35 branch, making the nscd
client in that branch vulnerable as well. Subsequently, the fix for
this issue was backported to all vulnerable branches in the GNU C
Library repository.
It is advised that distributions that may have cherry-picked the memcpy
SSE2 optimization in their copy of the GNU C Library, also apply the fix
to avoid the potential crash in the nscd client.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | glibc | < glibc 2.36-9 (bookworm) | glibc 2.36-9 (bookworm) |
| gnu | glibc | >= 0 < 2.36-9 | 2.36-9 |
| gnu | glibc | >= 0 < 2.36-9 | 2.36-9 |
| gnu | glibc | >= 0 < 2.36-9 | 2.36-9 |
| gnu | glibc | >= 2.35 < 2.37 | 2.37 |
| msrc | cbl2_glibc_2.35-10_on_cbl_mariner_2.0 | — | — |
| the_gnu_c_library | glibc | >= 2.35 < 2.37 | 2.37 |
CVSS provenance
nvdv3.16.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv6.2MEDIUM
vendor_debian6.2MEDIUM
vendor_msrc6.2MEDIUM
vendor_redhat6.2MEDIUM
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OSV
CVE-2026-3904: (Calling NSS-backed functions that support caching via nscd may call th
osv·2026-03-12·CVSS 6.2
CVE-2026-3904 [MEDIUM] CVE-2026-3904: (Calling NSS-backed functions that support caching via nscd may call th
(Calling NSS-backed functions that support caching via nscd may call th ...)
OSV
CVE-2026-3904: Calling NSS-backed functions that support caching via nscd may call the nscd client side code and in the GNU C Library version 2
osv·2026-03-11·CVSS 6.2
CVE-2026-3904 [MEDIUM] CVE-2026-3904: Calling NSS-backed functions that support caching via nscd may call the nscd client side code and in the GNU C Library version 2
Calling NSS-backed functions that support caching via nscd may call the nscd client side code and in the GNU C Library version 2.36 under high load on x86_64 systems, the client may call memcmp on inputs that are concurrently modified by other processes or threads and crash. The nscd client in the GNU C Library uses the memcmp function with inputs that may be concurrently modified by another thread, potentially resulting in spurious cache misses, which in itself is not a security issue. However in the GNU C Library version 2.36 an optimized implementation of memcmp was introduced for x86_64 which could crash when invoked with such undefined behaviour, turning this into a potential crash of the nscd client and the application that uses it. This implementation was backported to the 2.35 bran
GHSA
GHSA-3584-5r39-4gm3: Calling NSS-backed functions that support caching via nscd may call the
nscd client side code and in the GNU C Library version 2
ghsa_unreviewed·2026-03-11
CVE-2026-3904 [MEDIUM] CWE-366 GHSA-3584-5r39-4gm3: Calling NSS-backed functions that support caching via nscd may call the
nscd client side code and in the GNU C Library version 2
Calling NSS-backed functions that support caching via nscd may call the
nscd client side code and in the GNU C Library version 2.36 under high
load on x86_64 systems, the client may call memcmp on inputs that are
concurrently modified by other processes or threads and crash.
The nscd client in the GNU C Library uses the memcmp function with
inputs that may be concurrently modified by another thread, potentially
resulting in spurious cache misses, which in itself is not a security
issue. However in the GNU C Library version 2.36 an optimized
implementation of memcmp was introduced for x86_64 which could crash
when invoked with such undefined behaviour, turning this into a
potential crash of the nscd client and the application that uses it.
This implementation was backported to the 2.35 br
Red Hat
kernel: net: team: fix NULL pointer dereference in team_xmit during mode change
vendor_redhat·2026-07-20·CVSS 5.5
CVE-2026-64190 [MEDIUM] CWE-476 kernel: net: team: fix NULL pointer dereference in team_xmit during mode change
kernel: net: team: fix NULL pointer dereference in team_xmit during mode change
In the Linux kernel, the following vulnerability has been resolved:
net: team: fix NULL pointer dereference in team_xmit during mode change
__team_change_mode() clears team->ops with memset() before restoring
safe dummy handlers via team_adjust_ops(). A concurrent team_xmit()
running under RCU on another CPU can read team->ops.transmit during
this window and call a NULL function pointer, crashing the kernel.
The race requires a mode change (CAP_NET_ADMIN) concurrent with
transmit on the team device.
BUG: kernel NULL pointer dereference, address: 0000000000000000
Oops: 0010 [#1] SMP KASAN NOPTI
RIP: 0010:0x0
Call Trace:
team_xmit (drivers/net/team/team_core.c:1853)
dev_hard_start_xmit (net/core/dev.c:3904)
__de
Red Hat
glibc: nscd client crash on x86_64 under high nscd load
vendor_redhat·2026-03-11·CVSS 6.2
CVE-2026-3904 [MEDIUM] CWE-366 glibc: nscd client crash on x86_64 under high nscd load
glibc: nscd client crash on x86_64 under high nscd load
Calling NSS-backed functions that support caching via nscd may call the
nscd client side code and in the GNU C Library version 2.36 under high
load on x86_64 systems, the client may call memcmp on inputs that are
concurrently modified by other processes or threads and crash.
The nscd client in the GNU C Library uses the memcmp function with
inputs that may be concurrently modified by another thread, potentially
resulting in spurious cache misses, which in itself is not a security
issue. However in the GNU C Library version 2.36 an optimized
implementation of memcmp was introduced for x86_64 which could crash
when invoked with such undefined behaviour, turning this into a
potential crash of the nscd client and the application that use
Microsoft
CVE-2026-3904: Mariner: Mariner
glibc: glibc
Customer Action Required: Yes
vendor_msrc·2026-03-10·CVSS 6.2
CVE-2026-3904 [MEDIUM] CWE-366 CVE-2026-3904: Mariner: Mariner
glibc: glibc
Customer Action Required: Yes
Mariner: Mariner
glibc: glibc
Customer Action Required: Yes
Debian
CVE-2026-3904: glibc - Calling NSS-backed functions that support caching via nscd may call the nscd cl...
vendor_debian·2026·CVSS 6.2
CVE-2026-3904 [MEDIUM] CVE-2026-3904: glibc - Calling NSS-backed functions that support caching via nscd may call the nscd cl...
Calling NSS-backed functions that support caching via nscd may call the nscd client side code and in the GNU C Library version 2.36 under high load on x86_64 systems, the client may call memcmp on inputs that are concurrently modified by other processes or threads and crash. The nscd client in the GNU C Library uses the memcmp function with inputs that may be concurrently modified by another thread, potentially resulting in spurious cache misses, which in itself is not a security issue. However in the GNU C Library version 2.36 an optimized implementation of memcmp was introduced for x86_64 which could crash when invoked with such undefined behaviour, turning this into a potential crash of the nscd client and the application that uses it. This implementation was backported to the 2.35 bran
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-3904 glibc: nscd client crash on x86_64 under high nscd load
bugzilla·2026-03-11·CVSS 6.2
CVE-2026-3904 [MEDIUM] CVE-2026-3904 glibc: nscd client crash on x86_64 under high nscd load
CVE-2026-3904 glibc: nscd client crash on x86_64 under high nscd load
Calling NSS-backed functions that support caching via nscd may call the
nscd client side code and in the GNU C Library version 2.36 under high
load on x86_64 systems, the client may call memcmp on inputs that are
concurrently modified by other processes or threads and crash.
The nscd client in the GNU C Library uses the memcmp function with
inputs that may be concurrently modified by another thread, potentially
resulting in spurious cache misses, which in itself is not a security
issue. However in the GNU C Library version 2.36 an optimized
implementation of memcmp was introduced for x86_64 which could crash
when invoked with such undefined behaviour, turning this into a
potential crash of the nscd client and the appl
Wiz
CVE-2026-3904 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 6.2
CVE-2026-3904 [MEDIUM] CVE-2026-3904 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-3904 :
Wolfi vulnerability analysis and mitigation
Calling NSS-backed functions that support caching via nscd may call the
nscd client side code and in the GNU C Library version 2.36 under high
load on x86_64 systems, the client may call memcmp on inputs that are
concurrently modified by other processes or threads and crash.
The nscd client in the GNU C Library uses the memcmp function with
inputs that may be concurrently modified by another thread, potentially
resulting in spurious cache misses, which in itself is not a security
issue. However in the GNU C Library version 2.36 an optimized
implementation of memcmp was introduced for x86_64 which could crash
when invoked with such undefined behaviour, turning this into a
potential crash of the nscd client and the application
https://sourceware.org/bugzilla/show_bug.cgi?id=29863https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0004;hb=HEADhttps://sourceware.org/git/?p=glibc.git;a=commit;h=8804157ad9da39631703b92315460808eac86b0chttps://sourceware.org/git/?p=glibc.git;a=commit;h=b712be52645282c706a5faa038242504feb06db5http://www.openwall.com/lists/oss-security/2026/03/11/5https://cert-portal.siemens.com/productcert/html/ssa-082556.html
2026-03-11
Published