CVE-2025-71291: linux NULL Pointer Dereference
Vulnerability summary
CVE-2025-71291 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.8% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 24 · Related 24Timeline
- 06-05-2026PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: misc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read() In the function bcm_vk_read(), the pointer entry is checked, indicating that it can be NULL. If entry is NULL and rc is set to -EMSGSIZE, the following code may cause null-pointer dereferences: struct vk_msg_blk tmp_msg = entry->to_h_msg[0]; set_msg_id(&tmp_msg, entry->usr_msg_id); tmp_msg.size = entry->to_h_blks - 1; To prevent these possible null-pointer dereferences, copy to_h_msg, usr_msg_id, and to_h_blks from iter into temporary variables, and return these temporary variables to the application instead of accessing them through a potentially NULL entry.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.12%
Chance of exploitation in the next 30 days
Percentile
2%
Versus all other CVEs
30-day change
0.00 pp
From 0.12% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu157 products
- linuxAll versions (No fix recorded) | < 6.8.0-134.134
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 6.8.0-1060.63
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 88517757a829e9ce146a6c7233ad5dcdc66fcbb0, < 741c5a3a0cd893a4218fc0fc8c18403e54fcfb22 | ≥ 88517757a829e9ce146a6c7233ad5dcdc66fcbb0, < ece3722169ba93734bfd1f06255e8ab7f19fe964 | ≥ 88517757a829e9ce146a6c7233ad5dcdc66fcbb0, < aa97ccc3dc1eba9f4537f0410e9dbb0b05ccf2fb | ≥ 88517757a829e9ce146a6c7233ad5dcdc66fcbb0, < 3842f93e6e29d5cc1dcb9e5bda70587b444bed69 | ≥ 88517757a829e9ce146a6c7233ad5dcdc66fcbb0, < 20f2d9dbe5e972516f8f9948d7ae5b95d1ad77bd | ≥ 88517757a829e9ce146a6c7233ad5dcdc66fcbb0, < ba75ecb97d3f4e95d59002c13afb6519205be6cb | 5.19
- linux_kernel≥ 5.19, < 6.1.165 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.16 | ≥ 6.19, < 6.19.6
Debian1 product
- linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.6-1
3 vendors · 160 products
