🛡️ CVE-2024-49996 on Ubuntu — linux

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix buffer overflow when parsing NFS reparse points ReparseDataLength is sum of the InodeType size and DataBuffer size. So to get DataBuffer size it is needed to subtract InodeType's size from ReparseDataLength. Function cifs_strndup_from_utf16() is currentlly accessing buf->DataBuffer at position after the end of the buffer because it does not subtract InodeType size from the length. Fix this problem and correctly subtract variable len. Member InodeType is present only when reparse buffer is large enough. Check for ReparseDataLength before accessing InodeType to prevent another invalid memory access. Major and minor rdev values are present also only when reparse buffer is large enough. Check for reparse buffer size before calling reparse_mkdev().

Distribution advisory

This page covers CVE-2024-49996 as tracked by Ubuntu, for the package linux. The fix is available in version 6.8.0-54.56; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity low, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

Attack vector: Network — reachable from anywhere that can route to the service.
Attack complexity: Low — the attack works reliably, with no preparation.
Privileges required: None — an unauthenticated stranger can try it.
User interaction: None — nobody has to be tricked into anything.
Scope: Unchanged — the damage stays inside the vulnerable component.
Confidentiality impact: High — total loss, or loss the attacker controls.
Integrity impact: Low — limited, and the attacker does not choose what is affected.
Availability impact: High — total loss, or loss the attacker controls.

Weakness class

UBUNTU-CVE-2024-49996 is classified as CWE-120: Classic Buffer Overflow. Input is copied into a fixed-size buffer without a length check, overwriting memory past the end of it.

Affected software

UBUNTU-CVE-2024-49996 is recorded against 130 packages.

linux (fixed in 6.8.0-54.56)
linux-allwinner-5.19
linux-aws (fixed in 6.8.0-1023.25)
linux-aws-5.0
linux-aws-5.11
linux-aws-5.13
linux-aws-5.15 (fixed in 5.15.0-1080.87~20.04.1)
linux-aws-5.19
linux-aws-5.3
linux-aws-5.4 (fixed in 5.4.0-1142.152~18.04.1)
linux-aws-5.8
linux-aws-6.2
linux-aws-6.5
linux-aws-6.8 (fixed in 6.8.0-1023.25~22.04.1)
linux-aws-fips (fixed in 5.15.0-1080.87+fips1)
linux-azure (fixed in 6.8.0-1025.30)
linux-azure-5.11
linux-azure-5.13
linux-azure-5.15 (fixed in 5.15.0-1086.95~20.04.1)
linux-azure-5.19
linux-azure-5.3
linux-azure-5.4 (fixed in 5.4.0-1147.154~18.04.1)
linux-azure-5.8
linux-azure-6.11 (fixed in 6.11.0-1012.12~24.04.1)

Show the remaining 106 packages

linux-azure-6.2
linux-azure-6.5
linux-azure-6.8 (fixed in 6.8.0-1025.30~22.04.1)
linux-azure-edge
linux-azure-fde
linux-azure-fde-5.19
linux-azure-fde-6.2
linux-azure-fips (fixed in 5.15.0-1083.92+fips1)
linux-azure-nvidia (fixed in 6.8.0-1014.15)
linux-bluefield
linux-fips (fixed in 6.8.0-78.78+fips1)
linux-gcp (fixed in 6.8.0-1024.26)
linux-gcp-5.11
linux-gcp-5.13
linux-gcp-5.15 (fixed in 5.15.0-1081.90~20.04.1)
linux-gcp-5.19
linux-gcp-5.3
linux-gcp-5.4 (fixed in 5.4.0-1145.154~18.04.1)
linux-gcp-5.8
linux-gcp-6.11 (fixed in 6.11.0-1011.11~24.04.1)
linux-gcp-6.2
linux-gcp-6.5
linux-gcp-6.8 (fixed in 6.8.0-1024.26~22.04.1)
linux-gcp-fips (fixed in 5.15.0-1079.88+fips1)
linux-gke (fixed in 6.8.0-1019.23)
linux-gke-4.15
linux-gke-5.15
linux-gke-5.4
linux-gkeop (fixed in 6.8.0-1006.8)
linux-gkeop-5.15
linux-gkeop-5.4
linux-hwe
linux-hwe-5.11
linux-hwe-5.13
linux-hwe-5.15 (fixed in 5.15.0-136.147~20.04.1)
linux-hwe-5.19
linux-hwe-5.4 (fixed in 5.4.0-211.231~18.04.1)
linux-hwe-5.8
linux-hwe-6.2
linux-hwe-6.5
linux-hwe-6.8 (fixed in 6.8.0-57.59~22.04.1)
linux-hwe-edge
linux-ibm (fixed in 6.8.0-1022.22)
linux-ibm-5.15 (fixed in 5.15.0-1074.77~20.04.1)
linux-ibm-5.4 (fixed in 5.4.0-1090.95~18.04.1)
linux-ibm-6.8 (fixed in 6.8.0-1023.23~22.04.1)
linux-intel-5.13
linux-intel-iot-realtime (fixed in 5.15.0-1073.75)
linux-intel-iotg (fixed in 5.15.0-1075.81)
linux-intel-iotg-5.15 (fixed in 5.15.0-1077.83~20.04.1)
linux-iot (fixed in 5.4.0-1048.51)
linux-kvm (fixed in 5.15.0-1076.81)
linux-lowlatency (fixed in 6.8.0-54.56.1)
linux-lowlatency-hwe-5.15 (fixed in 5.15.0-135.146~20.04.1)
linux-lowlatency-hwe-5.19
linux-lowlatency-hwe-6.2
linux-lowlatency-hwe-6.5
linux-lowlatency-hwe-6.8 (fixed in 6.8.0-54.56.1~22.04.1)
linux-nvidia (fixed in 6.8.0-1022.25)
linux-nvidia-6.11 (fixed in 6.11.0-1007.7)
linux-nvidia-6.2
linux-nvidia-6.5
linux-nvidia-6.8 (fixed in 6.8.0-1022.25~22.04.2)
linux-nvidia-lowlatency (fixed in 6.8.0-1022.25.2)
linux-nvidia-tegra (fixed in 5.15.0-1033.33)
linux-nvidia-tegra-5.15 (fixed in 5.15.0-1039.39~20.04.1)
linux-nvidia-tegra-igx (fixed in 5.15.0-1021.21)
linux-oem
linux-oem-5.10
linux-oem-5.13
linux-oem-5.14
linux-oem-5.17
linux-oem-5.6
linux-oem-6.0
linux-oem-6.1
linux-oem-6.11 (fixed in 6.11.0-1015.15)
linux-oem-6.5
linux-oem-6.8 (fixed in 6.8.0-1024.24)
linux-oracle (fixed in 6.8.0-1020.21)
linux-oracle-5.0
linux-oracle-5.11
linux-oracle-5.13
linux-oracle-5.15 (fixed in 5.15.0-1077.83~20.04.1)
linux-oracle-5.3
linux-oracle-5.4 (fixed in 5.4.0-1140.149~18.04.1)
linux-oracle-5.8
linux-oracle-6.5
linux-oracle-6.8 (fixed in 6.8.0-1020.21~22.04.1)
linux-raspi (fixed in 6.8.0-1019.23)
linux-raspi-5.4 (fixed in 5.4.0-1129.142~18.04.1)
linux-raspi-realtime (fixed in 6.8.0-2018.19)
linux-raspi2
linux-realtime (fixed in 6.8.1-1016.17)
linux-realtime-6.8 (fixed in 6.8.1-1016.17~22.04.1)
linux-riscv (fixed in 6.8.0-53.55.1)
linux-riscv-5.11
linux-riscv-5.15 (fixed in 5.15.0-1075.79~20.04.1)
linux-riscv-5.19
linux-riscv-5.8
linux-riscv-6.5
linux-riscv-6.8 (fixed in 6.8.0-53.55.1~22.04.1)
linux-starfive-5.19
linux-starfive-6.2
linux-starfive-6.5
linux-xilinx (fixed in 6.8.0-1017.18)
linux-xilinx-zynqmp (fixed in 5.15.0-1044.48)

Timeline and source

Published on 21 October 2024 and last revised on 17 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

Other advisories for this package

linux has other advisories on record. If you are patching this one, these are worth checking on the same host:

DEBIAN-CVE-2022-4994 (published 30 Jul 2026)
CVE-2026-35233 (4.4 Medium, published 1 May 2026)
CVE-2026-21996 (3.3 Low, published 1 May 2026)
CVE-2026-21991 (5.5 Medium, published 16 Mar 2026)
CGA-mcwh-q4vm-9f29 (published 29 Jan 2026)
CGA-w6xv-3fg4-grm5 (published 29 Jan 2026)
CGA-7wmc-rrpx-535w (published 7 Jan 2026)
CGA-5g29-pc3v-86pw (published 7 Jan 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-120: Classic Buffer Overflow) in other software:

CVE-2019-5064 (8.0 High, published 9 Jul 2026)
CVE-2022-29210 (5.0 Medium, published 6 Jul 2026)
CVE-2021-41499 (8.0 High, published 2 Jul 2026)
CVE-2022-29974 (4.3 Medium, published 9 Dec 2024)
CVE-2022-20846 (4.3 Medium, published 15 Nov 2024)
CVE-2022-32504 (9.8 Critical, published 14 May 2024)
CVE-2022-24807 (6.5 Medium, published 16 Apr 2024)
CVE-2022-24805 (6.5 Medium, published 16 Apr 2024)

CVE-2024-49996 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

BellSoft — BELL-CVE-2024-49996 Base record — CVE-2024-49996 Debian — DEBIAN-CVE-2024-49996

Details

Severity Unknown

CVSS Score N/A

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2024-10-21

Updated 2026-08-20

Modified 2026-08-17

Fix URL N/A

Affected Packages

Software	From version	Fixed in
linux	—	6.8.0-54.56
linux-allwinner-5.19	—	—
linux-aws	—	6.8.0-1023.25
linux-aws-5.0	—	—
linux-aws-5.11	—	—
linux-aws-5.13	—	—
linux-aws-5.15	—	5.15.0-1080.87~20.04.1
linux-aws-5.19	—	—
linux-aws-5.3	—	—
linux-aws-5.4	—	5.4.0-1142.152~18.04.1
linux-aws-5.8	—	—
linux-aws-6.2	—	—
linux-aws-6.5	—	—
linux-aws-6.8	—	6.8.0-1023.25~22.04.1
linux-aws-fips	—	5.15.0-1080.87+fips1
linux-azure	—	6.8.0-1025.30
linux-azure-5.11	—	—
linux-azure-5.13	—	—
linux-azure-5.15	—	5.15.0-1086.95~20.04.1
linux-azure-5.19	—	—
linux-azure-5.3	—	—
linux-azure-5.4	—	5.4.0-1147.154~18.04.1
linux-azure-5.8	—	—
linux-azure-6.11	—	6.11.0-1012.12~24.04.1
linux-azure-6.2	—	—
linux-azure-6.5	—	—
linux-azure-6.8	—	6.8.0-1025.30~22.04.1
linux-azure-edge	—	—
linux-azure-fde	—	—
linux-azure-fde-5.19	—	—
linux-azure-fde-6.2	—	—
linux-azure-fips	—	5.15.0-1083.92+fips1
linux-azure-nvidia	—	6.8.0-1014.15
linux-bluefield	—	—
linux-fips	—	6.8.0-78.78+fips1
linux-gcp	—	6.8.0-1024.26
linux-gcp-5.11	—	—
linux-gcp-5.13	—	—
linux-gcp-5.15	—	5.15.0-1081.90~20.04.1
linux-gcp-5.19	—	—
linux-gcp-5.3	—	—
linux-gcp-5.4	—	5.4.0-1145.154~18.04.1
linux-gcp-5.8	—	—
linux-gcp-6.11	—	6.11.0-1011.11~24.04.1
linux-gcp-6.2	—	—
linux-gcp-6.5	—	—
linux-gcp-6.8	—	6.8.0-1024.26~22.04.1
linux-gcp-fips	—	5.15.0-1079.88+fips1
linux-gke	—	6.8.0-1019.23
linux-gke-4.15	—	—
linux-gke-5.15	—	—
linux-gke-5.4	—	—
linux-gkeop	—	6.8.0-1006.8
linux-gkeop-5.15	—	—
linux-gkeop-5.4	—	—
linux-hwe	—	—
linux-hwe-5.11	—	—
linux-hwe-5.13	—	—
linux-hwe-5.15	—	5.15.0-136.147~20.04.1
linux-hwe-5.19	—	—
linux-hwe-5.4	—	5.4.0-211.231~18.04.1
linux-hwe-5.8	—	—
linux-hwe-6.2	—	—
linux-hwe-6.5	—	—
linux-hwe-6.8	—	6.8.0-57.59~22.04.1
linux-hwe-edge	—	—
linux-ibm	—	6.8.0-1022.22
linux-ibm-5.15	—	5.15.0-1074.77~20.04.1
linux-ibm-5.4	—	5.4.0-1090.95~18.04.1
linux-ibm-6.8	—	6.8.0-1023.23~22.04.1
linux-intel-5.13	—	—
linux-intel-iot-realtime	—	5.15.0-1073.75
linux-intel-iotg	—	5.15.0-1075.81
linux-intel-iotg-5.15	—	5.15.0-1077.83~20.04.1
linux-iot	—	5.4.0-1048.51
linux-kvm	—	5.15.0-1076.81
linux-lowlatency	—	6.8.0-54.56.1
linux-lowlatency-hwe-5.15	—	5.15.0-135.146~20.04.1
linux-lowlatency-hwe-5.19	—	—
linux-lowlatency-hwe-6.2	—	—
linux-lowlatency-hwe-6.5	—	—
linux-lowlatency-hwe-6.8	—	6.8.0-54.56.1~22.04.1
linux-nvidia	—	6.8.0-1022.25
linux-nvidia-6.11	—	6.11.0-1007.7
linux-nvidia-6.2	—	—
linux-nvidia-6.5	—	—
linux-nvidia-6.8	—	6.8.0-1022.25~22.04.2
linux-nvidia-lowlatency	—	6.8.0-1022.25.2
linux-nvidia-tegra	—	5.15.0-1033.33
linux-nvidia-tegra-5.15	—	5.15.0-1039.39~20.04.1
linux-nvidia-tegra-igx	—	5.15.0-1021.21
linux-oem	—	—
linux-oem-5.10	—	—
linux-oem-5.13	—	—
linux-oem-5.14	—	—
linux-oem-5.17	—	—
linux-oem-5.6	—	—
linux-oem-6.0	—	—
linux-oem-6.1	—	—
linux-oem-6.11	—	6.11.0-1015.15
linux-oem-6.5	—	—
linux-oem-6.8	—	6.8.0-1024.24
linux-oracle	—	6.8.0-1020.21
linux-oracle-5.0	—	—
linux-oracle-5.11	—	—
linux-oracle-5.13	—	—
linux-oracle-5.15	—	5.15.0-1077.83~20.04.1
linux-oracle-5.3	—	—
linux-oracle-5.4	—	5.4.0-1140.149~18.04.1
linux-oracle-5.8	—	—
linux-oracle-6.5	—	—
linux-oracle-6.8	—	6.8.0-1020.21~22.04.1
linux-raspi	—	6.8.0-1019.23
linux-raspi-5.4	—	5.4.0-1129.142~18.04.1
linux-raspi-realtime	—	6.8.0-2018.19
linux-raspi2	—	—
linux-realtime	—	6.8.1-1016.17
linux-realtime-6.8	—	6.8.1-1016.17~22.04.1
linux-riscv	—	6.8.0-53.55.1
linux-riscv-5.11	—	—
linux-riscv-5.15	—	5.15.0-1075.79~20.04.1
linux-riscv-5.19	—	—
linux-riscv-5.8	—	—
linux-riscv-6.5	—	—
linux-riscv-6.8	—	6.8.0-53.55.1~22.04.1
linux-starfive-5.19	—	—
linux-starfive-6.2	—	—
linux-starfive-6.5	—	—
linux-xilinx	—	6.8.0-1017.18
linux-xilinx-zynqmp	—	5.15.0-1044.48

References

REPORT https://ubuntu.com/security/CVE-2024-49996

REPORT https://www.cve.org/CVERecord?id=CVE-2024-49996

REPORT https://git.kernel.org/linus/e2a8910af01653c1c268984855629d71fb81f404

REPORT https://git.kernel.org/stable/c/c6db81c550cea0c73bd72ef55f579991e0e4ba07

REPORT https://git.kernel.org/stable/c/803b3a39cb096d8718c0aebc03fd19f11c7dc919

REPORT https://git.kernel.org/stable/c/c173d47b69f07cd7ca08efb4e458adbd4725d8e9

REPORT https://git.kernel.org/stable/c/e2a8910af01653c1c268984855629d71fb81f404

ADVISORY https://ubuntu.com/security/notices/USN-7276-1

ADVISORY https://ubuntu.com/security/notices/USN-7277-1

ADVISORY https://ubuntu.com/security/notices/USN-7301-1

ADVISORY https://ubuntu.com/security/notices/USN-7303-1

ADVISORY https://ubuntu.com/security/notices/USN-7304-1

ADVISORY https://ubuntu.com/security/notices/USN-7303-2

ADVISORY https://ubuntu.com/security/notices/USN-7310-1

ADVISORY https://ubuntu.com/security/notices/USN-7311-1

ADVISORY https://ubuntu.com/security/notices/USN-7303-3

ADVISORY https://ubuntu.com/security/notices/USN-7384-1

ADVISORY https://ubuntu.com/security/notices/USN-7385-1

ADVISORY https://ubuntu.com/security/notices/USN-7386-1

ADVISORY https://ubuntu.com/security/notices/USN-7387-1

ADVISORY https://ubuntu.com/security/notices/USN-7388-1

ADVISORY https://ubuntu.com/security/notices/USN-7389-1

ADVISORY https://ubuntu.com/security/notices/USN-7390-1

ADVISORY https://ubuntu.com/security/notices/USN-7387-2

ADVISORY https://ubuntu.com/security/notices/USN-7387-3

ADVISORY https://ubuntu.com/security/notices/USN-7391-1

ADVISORY https://ubuntu.com/security/notices/USN-7392-1

ADVISORY https://ubuntu.com/security/notices/USN-7393-1

ADVISORY https://ubuntu.com/security/notices/USN-7392-2

ADVISORY https://ubuntu.com/security/notices/USN-7384-2

ADVISORY https://ubuntu.com/security/notices/USN-7392-3

ADVISORY https://ubuntu.com/security/notices/USN-7401-1

ADVISORY https://ubuntu.com/security/notices/USN-7392-4

ADVISORY https://ubuntu.com/security/notices/USN-7403-1

ADVISORY https://ubuntu.com/security/notices/USN-7407-1

ADVISORY https://ubuntu.com/security/notices/USN-7413-1

ADVISORY https://ubuntu.com/security/notices/USN-7421-1

ADVISORY https://ubuntu.com/security/notices/USN-7458-1

ADVISORY https://ubuntu.com/security/notices/USN-7459-1

ADVISORY https://ubuntu.com/security/notices/USN-7463-1

ADVISORY https://ubuntu.com/security/notices/USN-7459-2

ADVISORY https://ubuntu.com/security/notices/USN-7468-1

ADVISORY https://ubuntu.com/security/notices/USN-7539-1

ADVISORY https://ubuntu.com/security/notices/USN-7540-1

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🛡️ CVE-2024-49996 on Ubuntu — linux

Description

Distribution advisory

How this vulnerability can be exploited

CVSS metrics in full

Weakness class

Affected software

Timeline and source

References

Other advisories for this package

Same weakness in other software

CVE-2024-49996 on other distributions

Are you running linux?

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