CVE-2026-53160

fastrpc_map_lookup returns a raw pointer after releasing fl->lock. The caller fastrpc_map_create then calls fastrpc_map_get (kref_get_unless_zero) on this unprotected pointer. A concurrent MEM_UNMAP can free the map between the lock release and the kref operation, resulting in a use-after-free on the freed slab object.

Restore the take_ref parameter to fastrpc_map_lookup so the reference is acquired atomically under fl->lock before the pointer is exposed to the caller.

Database specific

{
    "cna_assigner":  "Linux",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53160.json"
}

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

0b70ec82b309a4093106ff399da1911ad23b52d3

Fixed

0a3b87293fbd34fda651e6aead9964f84b893962

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

d7513b47082c08105e837b06cebeb3f07a5fa56f

Fixed

8b080c89183196fd3e49212f2a1a1c4a29335b9c

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

802359a52676176b18713e33caa17572ad009057

Fixed

5b0166112019d1dce30b976ab28fd67f7f0be532

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

10df039834f84a297c72ec962c0f9b7c8c5ca31a

Fixed

992f121796b7ca83a5a8b93da24e971363206218

Fixed

f20f6512ecb75c816e0debf4551a138f098615c4

Fixed

07ebe87915d8accdaba20c4f88c5ae430fe62fbb

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

6.1.156

Fixed

6.1.176

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

6.6.112

Fixed

6.6.143

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

6.12.53

Fixed

6.12.94

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

6.17.3

Fixed

6.18

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

f3f59bab68e9bc714f757ab22f3fb36153014043

Affected versions

v6.*

v6.1.156

v6.1.157

v6.1.158

v6.1.159

v6.1.160

v6.1.161

v6.1.162

v6.1.163

v6.1.164

v6.1.165

v6.1.166

v6.1.167

v6.1.168

v6.1.169

v6.1.170

v6.1.171

v6.1.172

v6.1.173

v6.1.174

v6.1.175

v6.12.53

v6.12.54

v6.12.55

v6.12.56

v6.12.57

v6.12.58

v6.12.59

v6.12.60

v6.12.61

v6.12.62

v6.12.63

v6.12.64

v6.12.65

v6.12.66

v6.12.67

v6.12.68

v6.12.69

v6.12.70

v6.12.71

v6.12.72

v6.12.73

v6.12.74

v6.12.75

v6.12.76

v6.12.77

v6.12.78

v6.12.79

v6.12.80

v6.12.81

v6.12.82

v6.12.83

v6.12.84

v6.12.85

v6.12.86

v6.12.87

v6.12.88

v6.12.89

v6.12.90

v6.12.91

v6.12.92

v6.12.93

v6.17.10

v6.17.11

v6.17.12

v6.17.13

v6.17.3

v6.17.4

v6.17.5

v6.17.6

v6.17.7

v6.17.8

v6.17.9

v6.6.112

v6.6.113

v6.6.114

v6.6.115

v6.6.116

v6.6.117

v6.6.118

v6.6.119

v6.6.120

v6.6.121

v6.6.122

v6.6.123

v6.6.124

v6.6.125

v6.6.126

v6.6.127

v6.6.128

v6.6.129

v6.6.130

v6.6.131

v6.6.132

v6.6.133

v6.6.134

v6.6.135

v6.6.136

v6.6.137

v6.6.138

v6.6.139

v6.6.140

v6.6.141

v6.6.142

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53160.json"

Linux / Kernel

Package

Name: Kernel

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

6.1.176

Type: ECOSYSTEM
Events: Introduced

6.2.0

Fixed

6.6.143

Type: ECOSYSTEM
Events: Introduced

6.7.0

Fixed

6.12.94

Type: ECOSYSTEM
Events: Introduced

6.13.0

Fixed

6.18.36

Type: ECOSYSTEM
Events: Introduced

6.18.0

Fixed

7.0.13

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53160.json"