diff --git a/frontend/dockerfile/dockerignore/dockerignore_deprecated.go b/frontend/dockerfile/dockerignore/dockerignore_deprecated.go
new file mode 100644
index 000000000000..c30712bf5007
--- /dev/null
+++ b/frontend/dockerfile/dockerignore/dockerignore_deprecated.go
@@ -0,0 +1,14 @@
+package dockerignore
+
+import (
+	"io"
+
+	"github.com/moby/patternmatcher/ignorefile"
+)
+
+// ReadAll is an alias for [ignorefile.ReadAll].
+//
+// Deprecated: use [ignorefile.ReadAll] instead.
+func ReadAll(reader io.Reader) ([]string, error) {
+	return ignorefile.ReadAll(reader)
+}
diff --git a/frontend/dockerfile/dockerignore/dockerignore_test.go b/frontend/dockerfile/dockerignore/dockerignore_test.go
deleted file mode 100644
index c3cd07884cf8..000000000000
--- a/frontend/dockerfile/dockerignore/dockerignore_test.go
+++ /dev/null
@@ -1,61 +0,0 @@
-package dockerignore
-
-import (
-	"os"
-	"path/filepath"
-	"testing"
-)
-
-func TestReadAll(t *testing.T) {
-	di, err := ReadAll(nil)
-	if err != nil {
-		t.Fatalf("Expected not to have error, got %v", err)
-	}
-
-	if diLen := len(di); diLen != 0 {
-		t.Fatalf("Expected to have zero dockerignore entry, got %d", diLen)
-	}
-
-	diName := filepath.Join(t.TempDir(), ".dockerignore")
-	content := "test1\n/test2\n/a/file/here\n\nlastfile\n# this is a comment\n! /inverted/abs/path\n!\n! \n"
-	err = os.WriteFile(diName, []byte(content), 0600)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	diFd, err := os.Open(diName)
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer diFd.Close()
-
-	di, err = ReadAll(diFd)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if len(di) != 7 {
-		t.Fatalf("Expected 7 entries, got %v", len(di))
-	}
-	if di[0] != "test1" {
-		t.Fatal("First element is not test1")
-	}
-	if di[1] != "test2" { // according to https://docs.docker.com/engine/reference/builder/#dockerignore-file, /foo/bar should be treated as foo/bar
-		t.Fatal("Second element is not test2")
-	}
-	if di[2] != "a/file/here" { // according to https://docs.docker.com/engine/reference/builder/#dockerignore-file, /foo/bar should be treated as foo/bar
-		t.Fatal("Third element is not a/file/here")
-	}
-	if di[3] != "lastfile" {
-		t.Fatal("Fourth element is not lastfile")
-	}
-	if di[4] != "!inverted/abs/path" {
-		t.Fatal("Fifth element is not !inverted/abs/path")
-	}
-	if di[5] != "!" {
-		t.Fatalf("Sixth element is not !, but %s", di[5])
-	}
-	if di[6] != "!" {
-		t.Fatalf("Seventh element is not !, but %s", di[6])
-	}
-}
diff --git a/frontend/dockerui/config.go b/frontend/dockerui/config.go
index 12ec2c6880e0..0ae30245ed64 100644
--- a/frontend/dockerui/config.go
+++ b/frontend/dockerui/config.go
@@ -15,10 +15,10 @@ import (
 	"github.com/moby/buildkit/client/llb"
 	"github.com/moby/buildkit/exporter/containerimage/image"
 	"github.com/moby/buildkit/frontend/attestations"
-	"github.com/moby/buildkit/frontend/dockerfile/dockerignore"
 	"github.com/moby/buildkit/frontend/gateway/client"
 	"github.com/moby/buildkit/solver/pb"
 	"github.com/moby/buildkit/util/flightcontrol"
+	"github.com/moby/patternmatcher/ignorefile"
 	digest "github.com/opencontainers/go-digest"
 	ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/pkg/errors"
@@ -80,7 +80,8 @@ type Client struct {
 	g           flightcontrol.Group[*buildContext]
 	bopts       client.BuildOpts
 
-	dockerignore []byte
+	dockerignore     []byte
+	dockerignoreName string
 }
 
 type SBOM struct {
@@ -375,6 +376,7 @@ func (bc *Client) ReadEntrypoint(ctx context.Context, lang string, opts ...llb.L
 	})
 	if err == nil {
 		bc.dockerignore = dt
+		bc.dockerignoreName = bctx.filename + ".dockerignore"
 	}
 
 	return &Source{
@@ -435,13 +437,14 @@ func (bc *Client) MainContext(ctx context.Context, opts ...llb.LocalOption) (*ll
 			dt = []byte{}
 		}
 		bc.dockerignore = dt
+		bc.dockerignoreName = DefaultDockerignoreName
 	}
 
 	var excludes []string
 	if len(bc.dockerignore) != 0 {
-		excludes, err = dockerignore.ReadAll(bytes.NewBuffer(bc.dockerignore))
+		excludes, err = ignorefile.ReadAll(bytes.NewBuffer(bc.dockerignore))
 		if err != nil {
-			return nil, errors.Wrap(err, "failed to parse dockerignore")
+			return nil, errors.Wrapf(err, "failed parsing %s", bc.dockerignoreName)
 		}
 	}
 
diff --git a/frontend/dockerui/namedcontext.go b/frontend/dockerui/namedcontext.go
index 6a441c50822e..dd44b7d8fe89 100644
--- a/frontend/dockerui/namedcontext.go
+++ b/frontend/dockerui/namedcontext.go
@@ -11,9 +11,9 @@ import (
 	"github.com/moby/buildkit/client/llb"
 	"github.com/moby/buildkit/exporter/containerimage/exptypes"
 	"github.com/moby/buildkit/exporter/containerimage/image"
-	"github.com/moby/buildkit/frontend/dockerfile/dockerignore"
 	"github.com/moby/buildkit/frontend/gateway/client"
 	"github.com/moby/buildkit/util/imageutil"
+	"github.com/moby/patternmatcher/ignorefile"
 	"github.com/pkg/errors"
 )
 
@@ -206,9 +206,9 @@ func (bc *Client) namedContextRecursive(ctx context.Context, name string, nameWi
 			}) // error ignored
 
 			if len(dt) != 0 {
-				excludes, err = dockerignore.ReadAll(bytes.NewBuffer(dt))
+				excludes, err = ignorefile.ReadAll(bytes.NewBuffer(dt))
 				if err != nil {
-					return nil, nil, err
+					return nil, nil, errors.Wrapf(err, "failed parsing %s", DefaultDockerignoreName)
 				}
 			}
 		}
diff --git a/go.mod b/go.mod
index 3a0f30b56ebf..cae356e8498e 100644
--- a/go.mod
+++ b/go.mod
@@ -45,7 +45,7 @@ require (
 	github.com/klauspost/compress v1.16.3
 	github.com/mitchellh/hashstructure/v2 v2.0.2
 	github.com/moby/locker v1.0.1
-	github.com/moby/patternmatcher v0.5.0
+	github.com/moby/patternmatcher v0.6.0
 	github.com/moby/sys/mountinfo v0.6.2
 	github.com/moby/sys/signal v0.7.0
 	github.com/morikuni/aec v1.0.0
diff --git a/go.sum b/go.sum
index 8d45ddd3c5af..cdeadc543062 100644
--- a/go.sum
+++ b/go.sum
@@ -906,8 +906,8 @@ github.com/mitchellh/osext v0.0.0-20151018003038-5e2d6d41470f/go.mod h1:OkQIRizQ
 github.com/moby/buildkit v0.8.1/go.mod h1:/kyU1hKy/aYCuP39GZA9MaKioovHku57N6cqlKZIaiQ=
 github.com/moby/locker v1.0.1 h1:fOXqR41zeveg4fFODix+1Ch4mj/gT0NE1XJbp/epuBg=
 github.com/moby/locker v1.0.1/go.mod h1:S7SDdo5zpBK84bzzVlKr2V0hz+7x9hWbYC/kq7oQppc=
-github.com/moby/patternmatcher v0.5.0 h1:YCZgJOeULcxLw1Q+sVR636pmS7sPEn1Qo2iAN6M7DBo=
-github.com/moby/patternmatcher v0.5.0/go.mod h1:hDPoyOpDY7OrrMDLaYoY3hf52gNCR/YOUYxkhApJIxc=
+github.com/moby/patternmatcher v0.6.0 h1:GmP9lR19aU5GqSSFko+5pRqHi+Ohk1O69aFiKkVGiPk=
+github.com/moby/patternmatcher v0.6.0/go.mod h1:hDPoyOpDY7OrrMDLaYoY3hf52gNCR/YOUYxkhApJIxc=
 github.com/moby/sys/mount v0.1.0/go.mod h1:FVQFLDRWwyBjDTBNQXDlWnSFREqOo3OKX9aqhmeoo74=
 github.com/moby/sys/mount v0.1.1/go.mod h1:FVQFLDRWwyBjDTBNQXDlWnSFREqOo3OKX9aqhmeoo74=
 github.com/moby/sys/mount v0.3.3 h1:fX1SVkXFJ47XWDoeFW4Sq7PdQJnV2QIDZAqjNqgEjUs=
diff --git a/frontend/dockerfile/dockerignore/dockerignore.go b/vendor/github.com/moby/patternmatcher/ignorefile/ignorefile.go
similarity index 65%
rename from frontend/dockerfile/dockerignore/dockerignore.go
rename to vendor/github.com/moby/patternmatcher/ignorefile/ignorefile.go
index e7f29ae8df68..94ea5a0ef550 100644
--- a/frontend/dockerfile/dockerignore/dockerignore.go
+++ b/vendor/github.com/moby/patternmatcher/ignorefile/ignorefile.go
@@ -1,4 +1,4 @@
-package dockerignore
+package ignorefile
 
 import (
 	"bufio"
@@ -6,23 +6,31 @@ import (
 	"io"
 	"path/filepath"
 	"strings"
-
-	"github.com/pkg/errors"
 )
 
-// ReadAll reads a .dockerignore file and returns the list of file patterns
-// to ignore. Note this will trim whitespace from each line as well
-// as use GO's "clean" func to get the shortest/cleanest path for each.
+// ReadAll reads an ignore file from a reader and returns the list of file
+// patterns to ignore, applying the following rules:
+//
+//   - An UTF8 BOM header (if present) is stripped.
+//   - Lines starting with "#" are considered comments and are skipped.
+//
+// For remaining lines:
+//
+//   - Leading and trailing whitespace is removed from each ignore pattern.
+//   - It uses [filepath.Clean] to get the shortest/cleanest path for
+//     ignore patterns.
+//   - Leading forward-slashes ("/") are removed from ignore patterns,
+//     so "/some/path" and "some/path" are considered equivalent.
 func ReadAll(reader io.Reader) ([]string, error) {
 	if reader == nil {
 		return nil, nil
 	}
 
-	scanner := bufio.NewScanner(reader)
 	var excludes []string
 	currentLine := 0
-
 	utf8bom := []byte{0xEF, 0xBB, 0xBF}
+
+	scanner := bufio.NewScanner(reader)
 	for scanner.Scan() {
 		scannedBytes := scanner.Bytes()
 		// We trim UTF8 BOM
@@ -59,7 +67,7 @@ func ReadAll(reader io.Reader) ([]string, error) {
 		excludes = append(excludes, pattern)
 	}
 	if err := scanner.Err(); err != nil {
-		return nil, errors.Wrap(err, "error reading .dockerignore")
+		return nil, err
 	}
 	return excludes, nil
 }
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 76695844bad4..500dad70b301 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -632,9 +632,10 @@ github.com/mitchellh/hashstructure/v2
 # github.com/moby/locker v1.0.1
 ## explicit; go 1.13
 github.com/moby/locker
-# github.com/moby/patternmatcher v0.5.0
+# github.com/moby/patternmatcher v0.6.0
 ## explicit; go 1.19
 github.com/moby/patternmatcher
+github.com/moby/patternmatcher/ignorefile
 # github.com/moby/sys/mount v0.3.3
 ## explicit; go 1.16
 github.com/moby/sys/mount