AI Score
Confidence
Low
EPSS
Percentile
10.3%
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix masking negation logic upon negative dst register
The negation logic for the case where the off_reg is sitting in the
dst register is not correct given then we cannot just invert the add
to a sub or vice versa. As a fix, perform the final bitwise and-op
unconditionally into AX from the off_reg, then move the pointer from
the src to dst and finally use AX as the source for the original
pointer arithmetic operation such that the inversion yields a correct
result. The single non-AX mov in between is possible given constant
blinding is retaining it as it’s not an immediate based operation.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ae03b6b1c880",
"lessThan": "4d542ddb88fb",
"versionType": "git"
},
{
"status": "affected",
"version": "f92a819b4cbe",
"lessThan": "0e2dfdc74a7f",
"versionType": "git"
},
{
"status": "affected",
"version": "979d63d50c0c",
"lessThan": "53e0db429b37",
"versionType": "git"
},
{
"status": "affected",
"version": "979d63d50c0c",
"lessThan": "2cfa537674cd",
"versionType": "git"
},
{
"status": "affected",
"version": "979d63d50c0c",
"lessThan": "6eba92a4d4be",
"versionType": "git"
},
{
"status": "affected",
"version": "979d63d50c0c",
"lessThan": "7cf64d8679ca",
"versionType": "git"
},
{
"status": "affected",
"version": "979d63d50c0c",
"lessThan": "b9b34ddbe207",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/verifier.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.0",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "4.14.233",
"versionType": "custom",
"lessThanOrEqual": "4.14.*"
},
{
"status": "unaffected",
"version": "4.19.190",
"versionType": "custom",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.117",
"versionType": "custom",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.35",
"versionType": "custom",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.11.19",
"versionType": "custom",
"lessThanOrEqual": "5.11.*"
},
{
"status": "unaffected",
"version": "5.12.2",
"versionType": "custom",
"lessThanOrEqual": "5.12.*"
},
{
"status": "unaffected",
"version": "5.13",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/verifier.c"
],
"defaultStatus": "affected"
}
]
git.kernel.org/stable/c/0e2dfdc74a7f4036127356d42ea59388f153f42c
git.kernel.org/stable/c/2cfa537674cd1051a3b8111536d77d0558f33d5d
git.kernel.org/stable/c/4d542ddb88fb2f39bf7f14caa2902f3e8d06f6ba
git.kernel.org/stable/c/53e0db429b37a32b8fc706d0d90eb4583ad13848
git.kernel.org/stable/c/6eba92a4d4be8feb4dc33976abac544fa99d6ecc
git.kernel.org/stable/c/7cf64d8679ca1cb20cf57d6a88bfee79a0922a66
git.kernel.org/stable/c/b9b34ddbe2076ade359cd5ce7537d5ed019e9807