CVE-2024-26883
Linux Kernel BPF Stackmap Overflow Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stackmap overflow check on 32-bit arches The stackmap code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. The commit in the fixes tag actually attempted to fix this, but the fix did not account for the UB, so the fix only works on CPUs where an overflow does result in a neat truncation to zero, which is not guaranteed. Checking the value before rounding does not have this problem.
INFO
Published Date :
April 17, 2024, 11:15 a.m.
Last Modified :
June 27, 2024, 12:15 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-26883.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-26883 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-26883 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 27, 2024
Action Type Old Value New Value Added Reference kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html [No types assigned] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2024
Action Type Old Value New Value Added Reference kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html [No types assigned] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Apr. 29, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a No Types Assigned https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a Patch Changed Reference Type https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895 No Types Assigned https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895 Patch Changed Reference Type https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d No Types Assigned https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d Patch Changed Reference Type https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0 No Types Assigned https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0 Patch Changed Reference Type https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a No Types Assigned https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a Patch Changed Reference Type https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b No Types Assigned https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b Patch Changed Reference Type https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae No Types Assigned https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae Patch Changed Reference Type https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3 No Types Assigned https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3 Patch Changed Reference Type https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d No Types Assigned https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d Patch Added CWE NIST CWE-119 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 4.19.311 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.273 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.214 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.153 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.83 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.23 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.8 up to (excluding) 6.8.2 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 17, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stackmap overflow check on 32-bit arches The stackmap code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. The commit in the fixes tag actually attempted to fix this, but the fix did not account for the UB, so the fix only works on CPUs where an overflow does result in a neat truncation to zero, which is not guaranteed. Checking the value before rounding does not have this problem. Added Reference kernel.org https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-26883 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-26883
weaknesses.