CVE-2020-24241
published 2020-08-25CVE-2020-24241: In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
PriorityP416medium5.5CVSS 3.1
AVLACLPRNUIRSUCNINAH
EPSS
0.78%
52.1th percentile
In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | nasm | < nasm 2.15.04-1 (bookworm) | nasm 2.15.04-1 (bookworm) |
| msrc | azl3_tensorflow_2.16.1-9_on_azure_linux_3.0 | — | — |
| msrc | cbl2_tensorflow_2.11.1-2_on_cbl_mariner_2.0 | — | — |
| nasm | nasm | >= 0 < 2.15.04-1 | 2.15.04-1 |
| nasm | nasm | >= 0 < 2.15.04-1 | 2.15.04-1 |
| nasm | nasm | >= 0 < 2.15.04-1 | 2.15.04-1 |
| nasm | nasm | >= 0 < 2.15.04-1 | 2.15.04-1 |
| nasm | netwide_assembler | — | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P
osv5.5MEDIUM
vendor_debian5.5LOW
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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GHSA
GHSA-x2g3-wj9f-6wcx: In Netwide Assembler (NASM) 2
ghsa_unreviewed·2022-05-24
CVE-2020-24241 [MEDIUM] GHSA-x2g3-wj9f-6wcx: In Netwide Assembler (NASM) 2
In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
OSV
CVE-2020-24241: In Netwide Assembler (NASM) 2
osv·2020-08-25·CVSS 5.5
CVE-2020-24241 [MEDIUM] CVE-2020-24241: In Netwide Assembler (NASM) 2
In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
Microsoft
In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
vendor_msrc·2020-08-11·CVSS 5.5
CVE-2020-24241 [MEDIUM] CWE-416 In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
mitre: mitre
Customer Action Required: Yes
Red Hat
nasm: use-after-free in saa_wbytes function in nasmlib/saa.c
vendor_redhat·2020-07-28·CVSS 5.5
CVE-2020-24241 [MEDIUM] CWE-416 nasm: use-after-free in saa_wbytes function in nasmlib/saa.c
nasm: use-after-free in saa_wbytes function in nasmlib/saa.c
In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
Statement: nasm as shipped with Red Hat Enterprise Linux 7 and 8 are not affected by this flaw because the vulnerable code was introduced in a newer version of nasm.
Package: nasm (Red Hat Enterprise Linux 5) - Out of support scope
Package: nasm (Red Hat Enterprise Linux 6) - Out of support scope
Package: nasm (Red Hat Enterprise Linux 7) - Not affected
Debian
CVE-2020-24241: nasm - In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes...
vendor_debian·2020·CVSS 5.5
CVE-2020-24241 [MEDIUM] CVE-2020-24241: nasm - In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes...
In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
Scope: local
bookworm: resolved (fixed in 2.15.04-1)
bullseye: resolved (fixed in 2.15.04-1)
forky: resolved (fixed in 2.15.04-1)
sid: resolved (fixed in 2.15.04-1)
trixie: resolved (fixed in 2.15.04-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-24241 nasm: use-after-free in saa_wbytes function in nasmlib/saa.c [fedora-all]
bugzilla·2020-08-26·CVSS 5.5
CVE-2020-24241 [MEDIUM] CVE-2020-24241 nasm: use-after-free in saa_wbytes function in nasmlib/saa.c [fedora-all]
CVE-2020-24241 nasm: use-after-free in saa_wbytes function in nasmlib/saa.c [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple support
Bugzilla
CVE-2020-24241 nasm: use-after-free in saa_wbytes function in nasmlib/saa.c
bugzilla·2020-08-26·CVSS 5.5
CVE-2020-24241 [MEDIUM] CVE-2020-24241 nasm: use-after-free in saa_wbytes function in nasmlib/saa.c
CVE-2020-24241 nasm: use-after-free in saa_wbytes function in nasmlib/saa.c
In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.
Reference:
https://bugzilla.nasm.us/show_bug.cgi?id=3392707
Upstream patch:
https://github.com/netwide-assembler/nasm/commit/6ac6ac57e3d01ea8ed4ea47706eb724b59176461
Discussion:
Created nasm tracking bugs for this issue:
Affects: fedora-all [bug 1872804]
---
Statement:
nasm as shipped with Red Hat Enterprise Linux 7 and 8 are not affected by this flaw because the vulnerable code was introduced in a newer version of nasm.
---
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):
https://access.redhat.com/security/cve/cve-2020-24241
2020-08-25
Published